Anti-Corrosion Protective Coating System (C3 Medium) - For Medium Corrosivity Environments
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EPD
Certificate type
EPD
Certificate type
Anti-Corrosion Protective Coating System for the painting of steel to protect against corrosion in C3 basic atmospheric corrosivity environments as per ISO 12944.
Application
Refer to manufacturers application guidelines.
Description
Anti-Corrosion Protective Coating System for the painting of steel to protect against corrosion in C3 basic atmospheric corrosivity environments as per ISO 12944.
Systems are also available for C2, C4, and C5 corrosivity environments (ranging from Medium, High and Very High - specified separately).
Full system includes Primer and Topcoat.
If you require an Intumescent System, see 'Intumescent Fire Protection' and choose the system you require. If you would like specific information or advice on specifying a system for your project please contact Hempel.
Selecting the correct paint system for protection against corrosion requires a variety of factors to be taken into account to ensure that the most economical and best technical solution is achieved. For each project the most important factors to consider before selecting a protective coating are:
- Environmental Corrosivity (see table in image 2 above or Hempel ISO 12944 Brochure attached).
- Type of protected surface - Designing a coating system normally involves dealing with construction materials such as steel, hot dipped galvanized 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 construction material to be protected.
- 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 four time frames to categorize durability (see table in image 3 above or Hempel ISO 12944 Brochure attached).
- Planning 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.
General information
Color | Grey Guidance for specification option: Primer coat - Hempadur Speed-Dry ZP 600. Other Guidance for specification option: Multi-tint option for finishing coat. |
Finish | Gloss Semi-gloss |
Material | Epoxy Polyurethane (PUR) |
Shape | Formless |
Warranty description | Other |
Uniclass | |
CAWS | M60/195 Special coating M60/18 Special coating |
Specification data - Special coating systems
Classification data | |
System performance | C3 Medium (LFTM: 7–15 Years). Guidance for specification option: Medium corrosivity category (C3) environments requiring medium durability (7-15 years estimated life to first major maintenance), such as: External: Industrial and urban atmospheres with a low sulphur oxide (IV) contamination level. Inshore areas of low salinity. Internal: Production halls to facilities humidity and certain air contamination e.g. foodstuff plants, laundries, breweries, dairies. Hempadur Speed-Dry ZP600: A self-priming, two-component high build epoxy paint containing zinc phosphate. Hempathane Fast Dry 55750: Recommended as a high-build solution for protecting steel structures, in compliance with VOC regulations. May be specified as a one-coat direct-to-metal system. Can also be used as an undercoated intermediate coat or topcoat within the system. Hempathane HS 55610: This type of polyurethane has a high resistance to chemical leaks and spills. VOC compliant, with good gloss and colour retention. It is recommended as a topcoat for anticorrosive protection for industrial structures such as refineries, cellulosic plants, mines, exterior of storage tanks as well as in ports and ships. |
Preparation | Guidance for specification option: Blast clean to the cleanliness preparation grade Sa2½ according to ISO 8501-1: 2007 or as per the Product Data Sheet of the primer to be applied. Both metallic and non-metallic abrasives can be used. Grit is recommended. Remove any remaining dust before applying the paint. Surface preparation for most common substrates Carbon Steel, including cast iron and Corten steel Remove oil and grease by fresh water washing with a suitable detergent followed by fresh water rinsing to remove remaining salts and other contamination. Solvent cleaning may also be applied for small areas. All surfaces to be prepared in accordance with the coating manufacturer's written instructions. Consult manufacturer's literature for details or visit the website: www.hempel.com |
Initial coats | Hempadur Speed-Dry ZP 600. Guidance for specification option: A self-priming, two-component high build epoxy paint containing zinc phosphate. Manufacturer guidance(Primer) |
Finishing coats | Hempathane 55610 (Glossy). Guidance for specification option: A one coat Polyurethane topcoat cured with aliphatic isocyanate. It has a high volume solids and contains zinc phosphate making it suitable for protection of structures in corrosive environments. It can be applied direct to metal. VOC compliant two-component topcoat, with good gloss and colour retention. Hempathane Fast Dry 55750 (Semi-Gloss). Guidance for specification option: A two-component polyurethane paint, cured with aliphatic isocyanates. Good gloss retention and colour stability. Contains zinc phosphate. |
Sealing of internal movement joints | Guidance for specification option: Insert requirements or omit. |
External pointing to existing frames | Guidance for specification option: Insert requirements or omit. |
Additional coatings to surfaces that will be concealed when component is fixed in place | Manufacturer guidanceInsert requirements or omit. |
Estimated life to first major maintenance | 7–15 years. |
Dry film thickness | Manufacturer's standard. Guidance for specification option: Initial coat/ primer: 70 microns. Finishing coat/ topcoat: 50 microns. Total nominal: 120 microns. |
Colour | Primer: Grey 18620. Topcoat: Multi-Tint®. |
Finish | Manufacturer's standard. Guidance for specification option: See Finishing coats guidance for details. |
Standards | To ISO 12944. |
Sustainability data
Contains Red List materials | No |
Material | Epoxy Polyurethane (PUR) |
Expected Life | Seven year 15 year |
Product certifications
Product certifications
EPD
EPD - Hempathane HS 55610
EPD
Hempathane Fast Dry 55750
Literature
Literature type
Frequently Used Paints Brochure
Hempathane Fast Dry 55750 - Polyurethane Topcoat
Hempathane HS 55610 - Polyurethane Topcoat
Hempathane HS 55610 Product Information Sheet
Hempel Corporate Brochure
Hempel ISO 12944 Brochure
Hempel Sustainability E-Folder
How To Select The Right Paint System-ISO-12944
Case studies
Protecting millions of visitors at Park of Poland
Trusted corrosion protection for the Queensferry Crossing
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