How to select the right paint system Guidelines for coating protection in accordance with ISO 12944
How to select the right paint system
Introduction
The purpose of this guide is to help you select the best Hempel coating system to protect your structure against corrosion. All steel structures, facilities and installations, exposed to atmosphere, staying under water or in soil, suffer because of corrosion and require protection. Throughout this guide you will find important information regarding paint technology, criteria for right paint selection and surface preparation requirements. This guide has been prepared in accordance with the latest edition of the International Standard ISO 12944 “Paints and varnishes – corrosion protection of steel structures by protective paint systems”. Outlined at the end of this document are generic coating systems recommended by ourselves for different corrosive environments. This document is to be considered as a guide only.
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How to select the right paint system
1. How to select the right paint system A. Environmental corrosivity B. A type of protected surface C. The durability required for a paint system D. Planning the paint application process
6-9 6 9 9 9
2. Surface preparation 10-12 2.1 Surface preparation grades 10 A. Grades of a surface according to the ISO 8501-1 standard 10 B. Surface preparation grades after high pressure water cleaning 12 2.2 Types of surfaces 14 1. Steel surfaces 14 2. A bare steel structure with no previous protective coatings 14 3. A steel surface covered with shopprimers 15 4. A steel surface coated with a paint system which needs to be maintained 16 B. Hot dipped galvanised steel, aluminium and stainless steel surfaces 16 1. Hot dipped galvanised steel 16 2. Aluminium and stainless steel 16 3. Maximum service temperatures
17
4. Useful definitions A. Waviness of paint film B. Size and shape of the surface C. Surface roughness of the substrate D. Physical losses
18 19 19 19 19
5. Guide specification according to ISO 12944 C1/C2 Corrosivity category C3 Corrosivity category C4 Corrosivity category C5-I Corrosivity category C5-M Corrosivity category Immersed structures
20-41 20-23 24-25 26-29 30-33 34-37 38-41
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How to select the right paint system
World-leading coatings supplier Hempel was founded in 1915 and is today one of the world’s leading manufacturers and suppliers of coating solutions. Our advanced protective and decorative coatings can be found on millions of surfaces around the globe. From the world’s longest bridges and tallest skyscrapers to airports, sports stadia and civil structures our coatings protect your assets against corrosion in many different and challenging environments. Our history is rooted in protective coatings for the extreme conditions experienced in the Marine, Decorative and Protective industries, so you can be assured that we offer trusted technology, expert technical service and reliability. With our vast expertise and knowledge, you know we are the trusted protective coatings partner for many customers around the world.
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How to select the right paint system
Global service We want to give you the right products on site, on time, every time. With the support of our 28 manufacturing plants and over 150 stock points worldwide, we offer a flexible service to all our customers. A service that we believe is second to none.
Proven performance Our range of high performance protective coatings offer advanced protection and optimised application for a durable finish that looks good for longer, in even the most challenging climates. With our proven track record, we are a trusted protective coatings partner for customers around the world.
Professional support Our customers know that specifying the right products is crucial, to ensure corrosion and fire protection, good appearance and minimum maintenance. Our multinational, globally based teams are uniquely positioned to ensure the smooth running of your project. From planning to completion, specification to application, we have key people to support you both off and on site.
Innovative solutions With 15 global research and development facilities, we work locally with you to provide the right solution for your project. Our research and development teams are committed to continuous development of innovative and effective speciality coatings to give you durable protection whilst ensuring environmental responsibilities are met.
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How to select the right paint system
1. How to select the right paint system
Selecting the correct paint system for protection against corrosion requires a variety of factors to be taken into account to ensure that the best technical solution is achieved. For each project the most important factors to consider before selecting a protective coating are: • environmental corrosivity • surface preparation grades after high pressure water cleaning A. Environmental corrosivity When selecting a paint system it is vitally important to work out the conditions in which the structure, facility or installation is to operate. To establish the effect of environmental corrosivity, the following factors must be taken into account: • humidity and temperature (service temperature and temperature gradients) • the presence of UV radiation • chemical exposure (e.g. specific exposure in industrial plants) • mechanical damage (impact, abrasion etc.) 6
In the case of buried structures their porosity must be considered and the ground conditions which they are subject to. The dampness and pH of the terrain and biological exposure to bacteria and micro-organisms are of critical importance. In the case of water, the type and chemical composition of the water present is also significant. The corrosive aggressiveness of the environment will have an effect on: • the type of paint used for protection • the total thickness of a paint system • the surface preparation required • minimum and maximum recoating intervals
How to select the right paint system
Note that the more corrosive the environment, the more thorough the surface preparation required. The recoating intervals must also be strictly observed. Part 2 of ISO 12944 standard gives the corrosion classifications for atmospheric conditions, soil and water. This standard is a very general evaluation based on the corrosion time for carbon steel and zinc. It does not reflect specific chemical, mechanical or temperature exposure. However the standard specification may still be accepted as a good indicator for paint system projects as a whole.
ISO 12944 distinguishes 5 basic atmospheric corrosivity categories: C1
Very low
C2
Low
C2
Low
C4
High
C5-I
Very high (Industrial)
C5-M
Very high (Marine)
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How to select the right paint system
Corrosivity category C1 Very low
Environment examples Exterior -
Interior Heated buildings with a clean atmosphere such as offices, shops, schools, hotels.
Page 20-23
C2 Low
Atmosphere contaminated to a small extent, mainly rural regions.
Buildings which are not heated, where condensation may occur e.g. storehouses, sports halls.
20-23
C3 Medium
Industrial and urban atmosphere with an average sulphur oxide (IV) contamination level. Inshore areas of low salinity.
Production space of high humidity and certain air contamination e.g. foodstuff plants, laundries, breweries, dairies.
24-25
C4 High
Industrial areas and inshore areas of medium salinity.
Chemical plants, swimming pools, ship repair yards.
26-29
C5-I Very high (Industrial)
Industrial areas of high humidity and aggressive atmosphere.
Buildings and areas of almost constant condensation and high contamination.
30-33
C5-M Very high (Marine)
Inshore areas and offshore areas of high salinity.
Buildings and areas of almost constant condensation and high contamination.
34-37
The categories for water and soil according to the ISO 12944 standard are shown as:
Im1
Fresh water
Im2
Sea or brackish water
Im3
Soil
Corrosivity category
Environment
Examples of environments and structures
Im1
Fresh water
River installations, hydroelectric power plants.
Im2
Sea or brackish water
Seaports with the following structures: sluice gate, locks (water steps), water stilts, piers, offshore structures.
Im3
8
Soil
Underground tanks, steel stilts, pipelines.
Page
38-41
How to select the right paint system
B. A type of protected surface Designing a coating system normally involves dealing with constructional materials such as steel, hot dipped galvanised steel, spray-metallised steel, aluminium or stainless steel. The surface preparation, the paint products used (particularly the primer) and the total system thickness will depend mainly on the constructional material to be protected. C. The durability required for a paint system The lifetime of a paint system is assumed to be the period of time which passes until maintenance is required for the first time after application. ISO 12944 specifies a range of three time frames to categorise durability: Property
Standard
Low - L
2 to 5 years
Medium - M
5 to 15 years
High - H
More than 15 years
D. P lanning the paint application process The building schedule and the various stages of construction of any particular project determine how and when the paint system needs to be applied. Consideration needs to be given to materials at their prefabrication stage, when components are being prefabricated both off and on site and when building stages are complete. It is necessary to plan the job so that surface preparation and the drying/curing time of paint products in relation to temperature and humidity are considered. Also if one stage of construction takes place in a protected workshop environment and the next stage then takes place on site, recoating intervals must also be taken into account. Our skilled personnel are always available to assist our customers in selecting the most adequate coating system for the customer’s needs and requirements. For further information, please contact your local Hempel representative.
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How to select the right paint system
2. Surface preparation for metal 2.1 Surface preparation grades There are many ways to classify steel surface preparation grades but this document focuses on those outlined below. A. Grades of a surface according to the ISO 8501-1 standard Standard surface preparation grades for primary surface preparation by abrasive blasting methods Sa 3
Blast-cleaning to visually clean steel When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and shall be free from mill scale, rust, paint coatings and foreign matter1. It shall have a uniform metallic colour.
Sa 2 ½ Very thorough blast-cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from mill scale, rust, paint coatings and foreign matter1. Any remaining traces of contamination shall show only as slight stains in the form of spots or stripes. Sa 2
Thorough blast-cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from most of the mill scale, rust, paint coatings and foreign matter1. Any residual contamination shall be firmly adhering2.
Sa 1
Light blast-cleaning When viewed without magnification, the surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter1.
Standard preparation grades for primary surface preparation by hand cleaning St 3
Very thorough hand and power tool cleaning As for St 2, but the surface shall be treated much more thoroughly to give a metallic sheen arising from the metallic substrate.
St 2
Thorough hand and power tool cleaning When viewed without magnification, the surfaces shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter3.
Notes: 1. The term ‘foreign matter’ may include water-soluble salts and welding residues. These contaminants cannot always be completely removed from the surface by dry blast cleaning, hand and power tool cleaning or flame cleaning; wet blast cleaning may be necessary. 2. Mill scale, rust or a paint coating is considered to be poorly adhering if it can be removed by lifting with a blunt putty knife. 3. Preparation grade St 1 is not included as it corresponds to a surface unsuitable for painting.
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How to select the right paint system
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How to select the right paint system
B. Surface preparation grades after high pressure water cleaning Surface preparation grades by high pressure water cleaning should not only include the cleanliness grade but also the flash rust grade, since flash rusting may occur on cleaned steel during the drying period. There are several ways to classify the degree to which a steel surface is prepared after high pressure water cleaning.
This guide has used the ISO 8501-4 surface preparation grade standard using high pressure water jetting: “Initial surface conditions, preparation grades and flash rust grades in connection with high pressure water jetting”.
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How to select the right paint system
The standard applies to surface preparation by high pressure water cleaning for a paint coating. It distinguishes three levels of cleanliness with reference to visible contaminants (Wa 1 – Wa 2½) such as rust, mill scale, old paint coatings and other foreign matter. Description of the surface after cleaning Wa 1
Light high-pressure water jetting When viewed without magnification, the surface shall be free from visible oil and grease, loose or defective paint, loose rust and other foreign matter. Any residual contamination shall be randomly dispersed and firmly adherent.
Wa 2
Thorough high-pressure water jetting When viewed without magnification, the surface shall be free from visible oil, grease and dirt and most of the rust, previous paint coatings and other foreign matter. Any residual contamination shall be randomly dispersed and can consist of firmly adherent coatings, firmly adherent foreign matter and stains of previously existent rust.
Wa 2½
Very thorough high-pressure water jetting When viewed without magnification, the surface shall be free from all visible rust, oil, grease, dirt, previous paint coatings and, except for slight traces, all other foreign matter. Discolouration of the surface can be present where the original coating was not intact. The grey or brown/black discolouration observed on pitted and corroded steel cannot be removed by further water jetting.
Description of the surface appearance relating to three grades of flash rust L
Light flash rust A surface which, when viewed without magnification, exhibits small quantities of a yellow/brown rust layer through which the steel substrate can be seen. The rust, (seen as a discolouration) can be evenly distributed or present in patches, but it will be tightly adherent and not easily removed by gentle wiping with a cloth.
M
Medium flash rust A surface which, when viewed without magnification, exhibits a layer of yellow/brown rust that obscures the original steel surface. The rust can be evenly distributed or present in patches, but it will be reasonably well adherent and it will lightly mark a cloth that is gently wiped over the surface.
H
Heavy flash rust A surface which, when viewed without magnification, exhibits a layer of red yellow/brown rust that obscures the original steel surface and is loosely adherent. The rust layer can be evenly distributed or present in patches and it will readily mark a cloth that is gently wiped over the surface.
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How to select the right paint system
2.2 Types of surfaces 1. Steel surfaces To guarantee that a coating system delivers long lasting protection, it is essential to ensure that the right surface preparation is carried out before any paint is applied. For this reason the initial surface condition of the steel needs to be evaluated. Generally speaking, the condition of a steel surface prior to painting falls into one of the three following categories: 1) a bare steel structure with no previous protective paint coatings 2) a steel surface coated with a shopprimer 3) a steel surface coated with a paint system which needs to be maintained
ISO 8501-1 standard identifies four initial conditions for steel: A, B, C, D A Steel surface largely covered with adherent mill scale but little, if any, rust.
B Steel surface which has begun to rust and from which the mill scale has begun to flake.
2. A bare steel structure with no previous protective coatings Steel surfaces which have never been protected by paint coatings may be covered to a varying extent by rust, mill scale or other contaminants (dust, grease, ionic contamination/soluble salts, residues etc.).
C Steel surface on which the mill scale has rusted away or can be removed by scraping, but with slight pitting visible under normal vision.
The initial condition of such surfaces is defined by ISO 8501-1 standard: “Preparation of steel substrates before application of paints and related products. Visual assessment of surface cleanliness”.
D Steel surface on which the mill scale has rusted away and on which general pitting is visible under normal vision.
The corresponding photographs show levels of corrosion, preparation grades of unprotected steel substrates and steel substrates after completely removing previous coatings.
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A Grades - A 2½
B Grades - Sa 2½
C Grades - Sa 2½
D Grades - Sa 2½
A Grades - Sa 3
B Grades - Sa 3
C Grades - Sa 3
D Grades - Sa 3
How to select the right paint system
3. A steel surface covered with shopprimers The main purpose of applying shopprimers is to protect steel plates and structural components used in the prefabrication stage, or in storage before a main paint system is applied. A shopprimer film thickness normally equals 20 - 25μm (these figures are quoted for a smooth test panel). Steel plates and structural components coated with shopprimers can be welded. We offer the following shopprimers: Hempel’s Shopprimer 15280 (protection period - 3 to 5 months) is a solvent-borne epoxy shopprimer pigmented with zinc polyphosphate. It is designed for automatic spray application or manual application. Hempel’s Shopprimer ZS 15890 (protection period - 4 to 6 months) is a solvent-borne zinc silicate shopprimer designed for automatic spray application. Hempel’s Shopprimer ZS 15820 (protection period - 3 to 5 months) is a solvent-borne zinc silicate shopprimer, designed for automatic spray application. Hemucryl Shopprimer 18250 (protection period - 3 to 5 months) is a waterborne acrylic shopprimer. It is designed for automatic spray application or manual application.
Surfaces coated with a shopprimer must be prepared correctly prior to the application of a finishing paint system; this is termed, ‘second surface preparation’. A shopprimer may need to be partially or completely removed. The second surface preparation will be determined, by the finishing paint system and two key factors need to be taken into account: • the compatibility of an applied shopprimer and a finishing paint system • the surface profile achieved during preparation prior to a shopprimer application, i.e. whether the profile is suitable for a finishing paint system A surface coated with a shopprimer should always be thoroughly washed with water and detergent, (e.g. Hempel’s Light Clean 99350) at 15-20 MPa, and then rinsed carefully prior to a paint system application. Corrosion and damage due to welding spots must be cleaned to the preparation grade as specified in the ISO 8501-1 standard.
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How to select the right paint system
4. A steel surface coated with a paint system which needs to be maintained The condition of an existing paint system must be assessed using the degradation grade according to the standard and this must be done each time maintenance work is carried out. It will need to be determined whether the system should be completely removed or whether parts of the coating can remain.
For the different amounts of surface preparation required refer to ISO 8501-2 standard: “Preparation of steel substrates before application of paints and related products. Visual assessment of surface cleanliness. Preparation grades of previously coated steel substrates after localised removal of previous coatings”.
B. H ot dipped galvanised steel, aluminium and stainless steel surfaces In addition to standard steel, other non-iron materials can be used in construction such as hot dipped galvanised steel, aluminium or high-alloy steels. All of them require a separate approach in terms of surface preparation and the selection of a paint system. 1. Hot dipped galvanised steel When galvanised steel is exposed to the atmosphere, zinc corrosion products form on its surface. These products vary in their composition and adhesion and influence therefore the adhesive properties of applied paint systems. It is generally considered that the best surface for painting is one of pure, (within hours of the galvanisation process) or seasoned zinc. For stages in between it is recommended that the zinc corrosion products are removed by washing the surface with Hempel’s alkaline cleaner. This can be carried out using a mixture of 20 litres of pure water to half a litre of Hempel’s Light Clean 99350 detergent. The mixture must be applied to the surface and then rinsed off after half an hour, preferably at high pressure.
If necessary, washing should be combined with scrubbing using a special hard nylon bristle brush, abrasive paper or the surface cleaned by an abrasive, (glass balls, sand, etc.). For coating systems in lower corrosion classes, special adhesion primers are recommended. For coating systems in higher corrosion classes, surface preparation should include mechanical preparation of the surface, preferably by abrasive sweep blasting with a mineral abrasive. 2. Aluminium and stainless steel In the case of aluminium and stainless steel, the surface should be cleaned with fresh water and a detergent, then rinsed off thoroughly by pressure washing with fresh water. To obtain better adhesion for the paint system, it is recommended that abrasive blasting is carried out with a mineral abrasive or special brushes are used.
For further information and thorough explanations on processes and procedures of surface preparation, contact your local Hempel representative.
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How to select the right paint system
3. Maximum service temperatures Paint products have different resistances to temperatures depending on the binder and pigments used. The temperature resistance of individual paint types is shown below.
Temperature °C -50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100 110 120 140 200 400 600
alkyds bitumen acrylics epoxies polyurethanes silicates silicones
Suitable for continuous dry service Suitable for short temporary service only Suitability will depend on pigmentation. Above 400°C only aluminium pigment is suitable
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How to select the right paint system
4. Useful definitions
There are several useful definitions and terms used in coating protection technology. Here we provide you with a few necessary terms that you should be acquainted with when dealing with paints. Volume solids The volume solids (VS) figure expresses as a percentage the ratio of: Dry film thickness Wet film thickness The stated figure has been determined as the ratio between dry and wet film thickness of the coating applied in the indicated thickness under laboratory conditions, where no paint loss has been encountered.
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Theoretical spreading rate The theoretical spreading rate of the paint in a given dry film thickness on a completely smooth surface is calculated as follows: Volume solids % x 10 = m2/litre Dry film thickness (micron) Practical consumption The practical consumption is estimated by multiplying the theoretical consumption with a relevant consumption factor (CF). The consumption factor or the practical consumption cannot be stated in the Product Data Sheet because it depends on a number of external conditions.
How to select the right paint system
A. Waviness of paint film When paint is manually applied, the film will show some waviness on the surface. It will also have an average thickness higher than the specified dry film thickness in order to fulfil the 80:20 rule for example. This means the paint consumption will be higher than the theoretically calculated amount if you want to reach the minimum specified film thickness.
C. Surface roughness of the substrate When a substrate has a particularly rough surface this creates a “dead volume” which uses more paint than if the surface was smooth and this will affect any theoretical calculations. In the case of shopprimers with a thin film, this has the effect of seemingly larger surface causing higher consumption as the paint film covers irregular surface hollows.
B. Size and shape of the surface Complex and small-sized surfaces will lead to higher consumption through overspray, than the square, flat area which was used to work out the theoretical calculation.
D. Physical losses Factors such as residues in cans, pumps and hoses, discarded paint due to exceeded pot life, losses due to atmospheric conditions, insufficient skills of a painter etc. will all contribute to a higher consumption.
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How to select the right paint system
5. Guide specification according to ISO 12944 C1/2 Corrosivity category Sample systems corresponding to C1/C2 Corrosivity categories* Lifetime Top Coat
Topcoat 2nd Coat Primer
2-5 Years
System no. 1
System
DFT (μm)
Recommended use
1× Hempel's Speed-dry Alkyd 43140/1
40
As a single/double coat anticorrosive primer/finish for steel structures, general steel work has a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempaquick Enamel 53840
40
As a topcoat on steel in mild to moderately corrosive environment. In case of line application of small items to be packed together, Hempalin Enamel 52140 is recommended.
Total DFT
80
1× Hempel's Speed-dry Alkyd 43140/1
40
As a single/double coat anticorrosive primer/finish for steel structures, general steel work has a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempel's Speed-dry Alkyd 43140/1
40
As a single/double coat anticorrosive primer/finish for steel structures, general steel work has a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
Total DFT
80
1× Hemulin Primer 18310
40
As a fast drying primer on interior and exterior steelwork, machinery parts etc. in mildly to moderately corrosive environment.
1× Hemulin Enamel 58380
40
As a fast drying topcoat on steel in mildly to moderately corrosive environment.
Total DFT
80
1× Hempathane HS 55610
80
Total DFT
80
Surface
Top Coat
2-5 Years
Topcoat 2nd Coat
2
Primer
Surface
Top Coat
Topcoat 2nd Coat Primer
2-5 Years
3
Surface
Topcoat
2-5 Years
4
Surface
20
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Alkyd
Glossy
41 ± 1
519 g/L
45 minutes
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
WB Alkyd
Flat
41 ± 1
1 g/L
1 hour approx
WB Alkyd
Glossy
40 ± 1
4 g/L
30 minutes approx
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
Exterior
Interior
C1 Very low
-
Heated buildings with a clean atmosphere such as offices, shops, schools, hotels.
C2 Low
Atmosphere contaminated to a small extent, mainly rural regions.
Buildings which are not heated, where condensation may occur. e.g. storehouses, sports halls.
* For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
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How to select the right paint system
C1/2 Corrosivity category Sample systems corresponding to C1/C2 Corrosivity categories* Lifetime
Topcoat
5 - 15 Years
System no. 1
Surface Topcoat
5 - 15 Years
2
System
DFT (μm)
Recommended use
1× Hempadur Fast Dry 45410
120
As a fast curing topcoat in mild to severely corrosive environment. As one coat direct to metal in mild corrosive environment. As a topcoat where the usual cosmetic performance of epoxy coatings is acceptable.
Total DFT
120
1× Hempathane HS 55610
120
Total DFT
120
1× Hempel's Speed-dry Alkyd 43140/1
60
As a single/double coat anticorrosive primer/finish for steel structures, general steel work add a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempel's Speed-dry Alkyd 43140/1
60
As a single/double coat anticorrosive primer/finish for steel structures, general steel work add a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempaquick Enamel 53840
40
As a topcoat on steel in mild to moderately corrosive environment. In case of line application of small items to be packed together, Hempalin Enamel 52140 is recommended.
Total DFT
160
1× Hempel's Speed-dry Alkyd 43140/1
80
As a single/double coat anticorrosive primer/finish for steel structures, general steel work add a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempel's Speed-dry Alkyd 43140/1
80
As a single/double coat anticorrosive primer/finish for steel structures, general steel work add a multitude of applications for heavy and light steel industry, where quick drying properties are required. It is for general use, in exterior and interior steel surfaces. Suitable for protection of steel in mild to medium atmospheric corrosive environments.
Total DFT
160
1× Hempadur Mastic 45880
160
Total DFT
160
1x Hempadur Fast Dry 17410
100
1× Hempathane HS 55610
60
Total DFT
160
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Surface
> 15 Years
Topcoat
1
2nd Coat Primer
Surface
> 15 Years Top Coat
2
Topcoat 2nd Coat Primer
Surface
> 15 Years
Topcoat
3
Surface
Top Coat
> 15 Years
Topcoat 2nd Coat
4
Primer
Surface
22
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
Is suitable for the protection of new build and maintained steel structures where fast dry to handle and short overcoating times are required, such as in industrial halls, stadiums, exhibition halls, airports, bridges, power plants, refineries, chemical and petrochemical.
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
SB Epoxy
Semi flat
65 ± 1
331 g/L
1 hours approx
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Alkyd
Glossy
41 ± 1
519 g/L
45 minutes
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Alkyd
Flat
49 ± 1
442 g/L
15 minutes
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Epoxy
SB Polyurethane
Flat
75 ± 1
235 g/L
1 hour approx
Exterior
Interior
C1 Very low
-
Heated buildings with a clean atmosphere such as offices, shops, schools, hotels.
C2 Low
Atmosphere contaminated to a small extent, mainly rural regions.
Buildings which are not heated, where condensation may occur. e.g. storehouses, sports halls.
* For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
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How to select the right paint system
C3 Corrosivity category Sample systems corresponding to C3 Corrosivity category* Lifetime
Top Coat
2-5 Years
Topcoat 2nd Coat
System no. 1
Primer
System
DFT (μm)
1× Hempalin Primer 12050
80
General purpose for primer for Hempalin systems for protection of steel in mild to medium atmospheric corrosive environments.
1× Hempalin Enamel 52140
40
As a general purpose finishing coat in alkyd systems on exterior and interior steel and woodwork in mildly to moderately corrosive environment. As a finishing coat in engine rooms including tank tops, main engines and auxiliary machinery.
Total DFT
120
1× Hempathane HS 55610
120
Total DFT
120
1x Hempadur Fast Dry 17410
100
Is suitable for the protection of new build and maintained steel structures where fast dry to handle and short overcoating times are required, such as in industrial halls, stadiums, exhibition halls, airports, bridges, power plants, refineries, chemical and petrochemical.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
160
1× Hemudur 18500
100
As a general purpose primer on steel constructions.
1× Hemuthane Enamel 58510
60
As a durable topcoat in waterborne epoxy systems.
Total DFT
160
1× Hempadur Mastic 45880
140
As a self primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas where Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray-metallised surfaces to minimize popping.
1x Hempathane HS 55610
60
As a VOC-compliant, high build finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
200
1x Hempadur Fast Dry 17410
120
As a primer in mild to medium atmospheric environments. As an intermediated or finishing coat in epoxy systems in medium to severely corrosive atmospheric environments.
1x Hempathane HS 55610
80
As a VOC-compliant, high build finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
200
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempathane HS 55610
100
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
160
Surface
Topcoat
2-5 Years
2
Surface
5 - 15 Years Top Coat
1
Recommended use
Topcoat 2nd Coat
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Primer
Surface
Top Coat
5 - 15 Years
Topcoat 2nd Coat
2
Primer
Surface
> 15 Years Top Coat
1
Topcoat 2nd Coat Primer
Surface
Top Coat
Topcoat 2nd Coat Primer
> 15 Years
2
Surface
Top Coat
Topcoat 2nd Coat Primer
Surface
24
> 15 Years
3
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
SB Alkyd
Flat
49 ± 1
407 g/L
45 minutes
C3 Medium
SB Alkyd
Glossy
46 ± 1
429 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Epoxy
Flat
75 ± 1
235 g/L
1 hour approx
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
WB Epoxy
Semi flat
50 ± 1
22 g/L
2 hours approx
WB Polyurethane
Glossy
48 ± 1
50 g/L
20 minutes
Exterior
Interior
Industrial and urban atmosphere with an average sulphur oxide (IV) contamination level. Instore areas of low salinity.
Production space of high humidity and certain air contamination e.g. foodstuff plants, laundries, breweries, dairies.
* For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
Solvent Based Epoxy
Semi gloss
74 ± 1
238 g/L
45 minutes
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
25
How to select the right paint system
C4 Corrosivity category Sample systems corresponding to C4 Corrosivity category* Lifetime 2-5 Years Top Coat
System no. 1
System
DFT (μm)
Recommended use
1x Hempadur Fast Dry 17410
120
As a primer in mild to medium atmospheric environments. As an intermediated or finishing coat in epoxy systems in medium to severely corrosive atmospheric environments.
1× Hempathane HS 55610
80
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
200
1x Hempadur Fast Dry 17410
90
As a primer in mild to medium atmospheric environments. As an intermediated or finishing coat in epoxy systems in medium to severely corrosive atmospheric environments.
1x Hempadur Fast Dry 17410
90
As a primer in mild to medium atmospheric environments. As an intermediated or finishing coat in epoxy systems in medium to severely corrosive atmospheric environments.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
240
1x Hemudur 18500
90
As a general purpose primer on steel constructions.
1x Hemudur 18500
90
As a general purpose primer on steel constructions.
1× Hemuthane Enamel 58510
60
As a durable topcoat in waterborne epoxy systems.
Total DFT
240
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1x Hempadur Fast Dry 17410
80
As a primer in mild to medium atmospheric environments. As an intermediated or finishing coat in epoxy systems in medium to severely corrosive atmospheric environments.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
200
Topcoat 2nd Coat Primer
Surface
5 - 15 Years
Top Coat
1
Topcoat 2nd Coat Primer
Surface
Topcoat
5 - 15 Years
2nd Coat
2
Primer
Surface
5 - 15 Years Topcoat
2nd Coat
3
Primer
Surface
26
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
Exterior
Interior
SB Epoxy
Semi gloss
74 ± 1
238 g/L
45 minutes
C4 High
Industrial areas and instore areas of medium salinity.
Chemical plants, swimming pools, ship repair yards.
WB Acrylic
Glossy
67 ± 1
336 g/L
3 hours
SB Epoxy
Semi gloss
74 ± 1
238 g/L
45 minutes
SB Epoxy
Semi gloss
74 ± 1
238 g/L
45 minutes
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
WB Epoxy
Semi flat
50 ± 1
22 g/L
2 hours approx
WB Epoxy
Semi flat
50 ± 1
22 g/L
2 hours approx
WB Polyurethane
Glossy
48 ± 1
50 g/L
20 minutes
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Epoxy
Semi gloss
74 ± 1
238 g/L
45 minutes
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours * For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
27
How to select the right paint system
C4 Corrosivity category Sample systems corresponding to C4 Corrosivity category* Lifetime > 15 Years
Topcoat
System no. 1
2nd Coat Primer
System
DFT (μm)
1× Hempadur Mastic 45880/1
110
As a self primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas where Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spraymetallised surfaces to minimise popping.
1× Hempadur Mastic 45880/1
110
As a self primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas where Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spraymetallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
280
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempadur Mastic 45880/1
120
As a self primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas where Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spraymetallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
240
1× Hempel's Galvosil 15703
60
As a general purpose, heavy duty, rust preventing primer. As a single, complete coating for long-term protection of steel exposed to moderately to severely corrosive environment and to abrasion. As a tank lining in accordance with the Cargo Protection Guide. In compliance with SSPC-Paint 20, type 1, level 1 and ISO 12944-5.
1× Hempadur Mastic 45880/1
120
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
240
Surface
> 15 Years
Topcoat
2
Recommended use
2nd Coat Primer
Surface
> 15 Years
Topcoat
2nd Coat
3
Primer
Surface
28
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
Exterior
Interior
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
C4 High
Industrial areas and instore areas of medium salinity.
Chemical plants, swimming pools, ship repair yards.
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
* For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
SB Zinc Silicate
Flat
64 ± 1
432 g/L
30 minutes
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
29
How to select the right paint system
C5-I Corrosivity category Sample systems corresponding to C5 Industrial Corrosivity category* Lifetime 5 - 15 Years
System no. 1
System
DFT (μm)
Recommended use
1× Hempadur Mastic 45880/1
150
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempadur Mastic 45880/1
150
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
Total DFT
300
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempadur Mastic 45880/1
120
As an intermediate high build fairing surfacer in an epoxy system where the cosmetic finish is important.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
240
Topcoat 2nd Coat Primer
Surface
5 - 15 Years Topcoat
2nd Coat Primer
Surface
30
2
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
Exterior
Interior
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
C5-I Very high (Industrial)
Industrial areas of high humidity and aggressive atmosphere.
Buildings and areas of almost constant condensation and high contamination.
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Epoxy
Semi gloss
63 ± 1
359 g/L
1 hour
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
* For places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred, especially for later overcoating with paints containing zinc. Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in the case of later overcoating with paint not containing zinc. Ask Hempel for more specific guidelines regarding the optimum choice of shopprimer and the need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
31
How to select the right paint system
C5-I Corrosivity category Sample systems corresponding to C5 Industrial Corrosivity category* Lifetime > 15 Years
Topcoat
System no. 1
2nd Coat Primer
System
DFT (μm)
1× Hempadur Mastic 45880/1
130
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempadur Mastic 45880/1
130
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempadur Mastic 45880/1
200
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
1× Hempel's Galvosil 15700
60
As a general purpose, heavy duty, rust preventing timber. As a single, complete coating for long term protection of steel exposed to moderately to severely corrosive environment and to abrasion. As a tank lining in accordance with the Cargo Protection Guide in compliance with SSPC-Paint 20 type 1, level 1 and ISO 12944-5.
1× Hempadur Mastic 45880/1
200
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
Surface
> 15 Years Topcoat
2
2nd Coat Primer
Surface
> 15 Years
Topcoat
2nd Coat
3
Primer
Surface
32
Recommended use
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
Exterior
Interior
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
C5-I Very high (Industrial)
Industrial areas of high humidity and aggressive atmosphere.
Buildings and areas of almost constant condensation and high contamination.
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Silicate
Flat
67 ± 1
535 g/L
30 minutes approx
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
* For the places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred – especially for later overcoating with zinc containing paints – Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in case of later overcoating with non-zinc containing paint. Ask Hempel for more specific guidelines regarding optimum choice of shopprimer and need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
33
How to select the right paint system
C5-M Corrosivity category Sample systems corresponding to C5 Marine Corrosivity category* Lifetime 5 - 15 Years
System no. 1
System
DFT (μm)
1× Hempadur Mastic 45880
150
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempadur Mastic 45880
150
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
Total DFT
300
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempadur Mastic 45880
120
Is suitable for the protection of new build and maintained steel structures where fast dry to handle and short overcoating times are required, such as in industrial halls, stadiums, exhibition halls, airports, bridges, power plants, refineries, chemical and petrochemical.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
240
Topcoat 2nd Coat Primer
Surface
5 - 15 Years
Topcoat
2nd Coat
2
Primer
Surface
34
Recommended use
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
C5-M Very high (Marine)
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Epoxy
Flat
75 ± 1
235 g/L
1 hour approx
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
Exterior
Interior
Marine areas and offshore areas of high salinity.
Buildings and areas of almost constant condensation and high contamination.
* For places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred, especially for later overcoating with paints containing zinc. Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in the case of later overcoating with paint not containing zinc. Ask Hempel for more specific guidelines regarding the optimum choice of shopprimer and the need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
35
How to select the right paint system
C5-M Corrosivity category Sample systems corresponding to C5 Marine Corrosivity category* Lifetime > 15 Years
Topcoat
System no. 1
System
DFT (μm)
1× Hempadur Mastic 45880/1
130
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempadur Mastic 45880/1
130
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
1× Hempadur Avantguard 750
60
As a versatile primer for long-term protection of steel in severely corrosive environments.
1× Hempadur Mastic 45880/1
100
Is suitable for the protection of new build and maintained steel structures where fast dry to handle and short overcoating times are required, such as in industrial halls, stadiums, exhibition halls, airports, bridges, power plants, refineries, chemical and petrochemical.
1× Hempadur Mastic 45880/1
100
Is suitable for the protection of new build and maintained steel structures where fast dry to handle and short overcoating times are required, such as in industrial halls, stadiums, exhibition halls, airports, bridges, power plants, refineries, chemical and petrochemical.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
1× Hempel's Galvosil 15700
60
As a general purpose, heavy duty, rust preventing timber. As a single, complete coating for long term protection of steel exposed to moderately to severely corrosive environment and to abrasion. As a tank lining in accordance with the Cargo Protection Guide in compliance with SSPC-Paint 20 type 1, level 1 and ISO 12944-5.
1× Hempadur Mastic 45880/1
100
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempadur Mastic 45880/1
100
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1× Hempathane HS 55610
60
As a VOC compliant, high building finishing coat for protection of structural steel in severely corrosive environment. May be specified as a one coat "direct to metal" system in environments classified as C2 and C3.
Total DFT
320
2nd Coat Primer
Surface
> 15 Years
Topcoat
2
3rd Coat 2nd Coat Primer
Surface
> 15 Years
Topcoat
3
3rd Coat 2nd Coat Primer
Surface
36
Recommended use
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Corrosivity category
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
C5-M Very high (Marine)
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Epoxy
Flat
65 ± 1
315 g/L
10 minutes
SB Epoxy
Flat
75 ± 1
235 g/L
1 hour approx
SB Epoxy
Flat
75 ± 1
235 g/L
1 hour approx
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
SB Zinc Silicate
Flat
64 ± 1
535 g/L
30 minutes approx
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
SB Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
Exterior
Interior
Marine areas and offshore areas of high salinity.
Buildings and areas of almost constant condensation and high contamination.
* For places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred, especially for later overcoating with paints containing zinc. Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in the case of later overcoating with paint not containing zinc. Ask Hempel for more specific guidelines regarding the optimum choice of shopprimer and the need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
SB Polyurethane
Glossy
67 ± 1
336 g/L
3 hours
37
How to select the right paint system
Immersed structures For steel structures immersed in water (excluding potable water) or buried in soil Lifetime 5 - 15 Years
Topcoat
System no. 1
System
DFT (μm)
1x Hempadur Quattro 17634
190
As a universal epoxy and self primed high performance coating system for atmospheric or in water service, including water ballast tanks and cargo oil tanks to be coated according to IMO-PSPC requirements. It is intended for all year application down to -10°C/15°F.
1x Hempadur Quattro 17634
190
As a universal epoxy and self primed high performance coating system for atmospheric or in water service, including water ballast tanks and cargo oil tanks to be coated according to IMO-PSPC requirements. It is intended for all year application down to -10°C/15°F.
Total DFT
380
1x Hempadur Mastic 45880/1
190
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
1x Hempadur Mastic 45880/1
190
As a self-primed, surface tolerant paint system or as an intermediate or finishing coat in heavy duty paint systems where low VOC and high film build are required. For immersed areas Hempadur Mastic 45880 is only recommended for minor repairs. Can be specified where extended recoating properties for polyurethane topcoats are requested (typically travel coating). May be used directly on cured zinc silicate (Galvosil products) or spray metallised surfaces to minimise popping.
Total DFT
380
1x Hempadur Multi-strength GF 35870
400
Total DFT
400
Primer
Surface
5 - 15 Years
2
Topcoat 2nd Coat Primer
Surface
Topcoat
Surface
38
5 - 15 Years
3
Recommended use
As a self primed, high build coating primarily for areas subject to abrasion and/ or to a highly corrosive environment, e.g. splash zones, jetty pilings and working decks. Can be used as interior lining for crude oil and fuel oil storage tanks.
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Epoxy
Semi flat
72 ± 1
275 g/L
2 hours
Epoxy
Semi flat
72 ± 1
275 g/L
2 hours
* For places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred, especially for later overcoating with paints containing zinc. Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in the case of later overcoating with paint not containing zinc. Ask Hempel for more specific guidelines regarding the optimum choice of shopprimer and the need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
Epoxy
Semi gloss
80 ± 1
216 g/L
3 hours
Epoxy GF
Glossy
87 ± 1
188 g/L
4 hours
39
How to select the right paint system
Immersed structures For steel structures immersed in water (excluding potable water) or buried in soil Lifetime > 15 Years
Topcoat
System no. 1
2nd Coat Primer
Surface
> 15 Years
Topcoat
2
2nd Coat Primer
System
DFT (μm)
Recommended use
1x Hempadur Quattro 17634
150
As a universal epoxy and self primed high performance coating system for atmospheric or in water service, including water ballast tanks and cargo oil tanks to be coated according to IMO-PSPC requirements. It is intended for all year application down to -10°C/15°F.
1x Hempadur Quattro 17634
175
As a universal epoxy and self primed high performance coating system for atmospheric or in water service, including water ballast tanks and cargo oil tanks to be coated according to IMO-PSPC requirements. It is intended for all year application down to -10°C/15°F.
1x Hempadur Quattro 17634
175
As a universal epoxy and self primed high performance coating system for atmospheric or in water service, including water ballast tanks and cargo oil tanks to be coated according to IMO-PSPC requirements. It is intended for all year application down to -10°C/15°F.
Total DFT
500
1x Hempadur Multi-strength 45751/3
150
As a heavy duty coating for areas exposed to abrasion and aggressive corrosive climate such as ramps, ship hulls and holds of bulk carriers. As a ballast tank coating for special purposes where pure epoxy coating is requested. As a finishing coat where a cosmetic appearance is less important. 45751 is intended for use in warm climates. 45753 for use in cold climates.
1x Hempadur Multi-strength 45751/3
175
As a heavy duty coating for areas exposed to abrasion and aggressive corrosive climate such as ramps, ship hulls and holds of bulk carriers. As a ballast tank coating for special purposes where pure epoxy coating is requested. As a finishing coat where a cosmetic appearance is less important. 45751 is intended for use in warm climates. 45753 for use in cold climate.
1x Hempadur Multi-strength 45751/3
175
As a heavy duty coating for areas exposed to abrasion and aggressive corrosive climate such as ramps, ship hulls and holds of bulk carriers. As a ballast tank coating for special purposes where pure epoxy coating is requested. As a finishing coat where a cosmetic appearance is less important. 45751 is intended for use in warm climates. 45753 for use in cold climate.
Total DFT
500
1x Hempadur Multi-strength GF 35870
300
As a self primed, high build coating primarily for areas subject to abrasion and/ or to a highly corrosive environment, e.g. splash zones, jetty pilings and working decks. Can be used as interior lining for crude oil and fuel oil storage tanks.
1x Hempadur Multi-strength GF 35870
300
As a self primed, high build coating primarily for areas subject to abrasion and/ or to a highly corrosive environment, e.g. splash zones, jetty pilings and working decks. Can be used as interior lining for crude oil and fuel oil storage tanks.
Total DFT
600
1x Hempadur 87540
800
Total DFT
800
Surface
> 15 Years
Topcoat
3
Primer
Surface
Topcoat
Surface
40
> 15 Years
4
As a self primed, high build coating for the protection of the exterior of buried steel pipes, valves, fittings etc. operating at elevated temperatures in severely corrosive environments. As a repair system for pipelines.
How to select the right paint system
Paint type
Finish
Volume solids
VOC
Dry to touch 20° C
Epoxy
Semi flat
72 ± 1
275 g/L
2 hours
Epoxy
Semi flat
72 ± 1
275 g/L
2 hours
Epoxy
Semi flat
72 ± 1
275 g/L
2 hours
Epoxy
Semi gloss
79 ± 1
45751 250 g/L
45751 7-8 hours
45753 235 g/L
45753 8-10 hours
45751 250 g/L
45751 7-8 hours
45753 235 g/L
45753 8-10 hours
45751 250 g/L
45751 7-8 hours
45753 235 g/L
45753 8-10 hours
188 g/L
4 hours
Epoxy
Epoxy
Epoxy
Semi gloss
Semi gloss
Glossy
79 ± 1
79 ± 1
87 ± 1
Epoxy
Glossy
87 ± 1
188 g/L
4 hours
Epoxy
Glossy
100
5 g/L
1 hour
* For places where blasting as secondary surface preparation is not possible after production, the use of shopprimed steel is an option. Zinc silicate based shopprimers e.g. Hempel’s Shopprimer ZS 15890 or 15820 are preferred, especially for later overcoating with paints containing zinc. Epoxy based shopprimers e.g. Hempel Shopprimer 15280 can also be used in the case of later overcoating with paint not containing zinc. Ask Hempel for more specific guidelines regarding the optimum choice of shopprimer and the need for secondary surface preparation. SB = Solvent-borne WB = Waterborne DFT = Dry Film Thickness
41
How to select the right paint system
Winning solutions 2014 World Cup Stadia, Brazil Although the 2014 FIFA World Cup officially kicked off on 12th June 2014 when host nation Brazil played Croatia, we had been actively involved in the country’s intense stadium preparation programme for the previous 3 years.
Stadiums including: Arena Fonte Nova Stadium Castelao Stadium Arena do Gremio Stadium
Hempel was a natural choice for this project. With our global facilities and flexible service offering, it was possible to assist our customer efficiently both in Portugal, for the initial build and in Brazil for subsequent touch up and repair work after the long crossing. The huge metal structures for all 3 stadiums were manufactured and fully coated in Portugal, before being shipped to Brazil and erected on site. Our systems were chosen to resist the corrosive salty ocean crossing, the hard knocks that happen during transportation and protect against the Brazilian climate for many years to come. With a reputation among steel constructors as an extremely reliable product that combines excellent mechanical resistance with high productivity, Hempadur Fast Dry 15560 was integral to this durable protective coating system. Arena Fonte Nova in Salvador da Bahia, with a capacity for 55,000 spectators, and coated with 40,000 litres of Hempel, was awarded the 2013 European Steel Design Award by ECCS (European Convention for Construction Steelwork). Part of the legacy of Brazil 2014, these three stadia continue to play an important role as major sporting venues and our coatings systems continue to protect a combined 6,220 tonnes of steel that form their roofs.
Products Hempadur Zinc 17360 Hempadur Fast Dry 15560 Hempathane HS 55610
42
Photo: Fábio Lima
How to select the right paint system
Vestas, Denmark 140 metres high, the Vestas’ wind turbine produces electricity for around 7,500 homes. It is protected with our two-coat system that Vestas use as standard on their offshore wind towers. As well as excellent anti-corrosive performance and rapid application properties, the system delivers excellent abrasion resistance to protect during transportation and installation, and lasting weather and UV resistance. Products Hempadur 4774A Hempathane HS 5561B
Elco, Oman Elco, a leading engineering and fabrication company, identified Hempel as the right coatings supplier for the onshore Khazzan and Makarem processing facility, to give the best corrosion protection available. The system that Elco are using includes Hempadur Avantguard 750, an activated zinc primer that is ideal for use in severely corrosive environments.
Products Hempadur Avantguard 750 Hempadur MIO 47950 Hempathane HS 55610
VW Manufacturing Plant, Russia When constructing a new factory for a leading German automotive manufacturer, our customer needed a coating system that not only delivers excellent corrosion protection, but could also be applied extremely quickly. Hempel's Speed Dry Alkyd met these tough conditions, as it is engineered for C2 corrosive environments and dries in less than two hours.
Products Speed-Dry Alkyd 4314 (primer) Speed-Dry Alkyd 4314 (topcoat) 43
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Since 1915 Hempel has been a world-leading coatings specialist, providing protection and inspiration to the world around us. Today we have over 5,500 people in 80 countries delivering trusted solutions in the protective, decorative, marine, container, industrial and yacht markets. This includes many recognised brands like Crown Paints, Schaepman and Jones-Blair. Hempel is proudly owned by the Hempel Foundation, which supports cultural, humanitarian and scientific causes across the world.
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Hempel Jeddah Al Suhaili Commercial Centre, Siteen Street, Al Rabwah District, P.O.Box 6783, Jeddah 21452 Kingdom of Saudi Arabia Tel: +966 2 257 4567 Fax: +966 2 275 2828
Hempel Kuwait Shuwaikh Industrial Area Block B, Street No. 30, Plot No. 119 P.O.Box 3400, Safat 13034, State of Kuwait Tel: +965 2 202 0700 Fax: +965 2 484 3307
Hempel Syria Industrial City, Hassia P.O.Box 11613, Damascus Syrian Arab Republic Tel: +963 31 5360150/8 Hempel (Decorative Paints) in Egypt Tel: +20105298886
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