In general these paints are far easier to work and easier to clean up. Water-based or latex and acrylic paints dry much faster than the oil based paints. Oil based paints are available in many colours and finishes, eg matte, flat and gloss. Once fully dried and cured, these paints are very tough and do not easily chip or stain, and. They also take longer to dry than other pain systems. These paints can smell bad as they usually contain solvents, which can also be flammable. This type of final coat paint is not always readily identified as suitable for stainless steel, however it is commonly noted for metal finishes. Remember as already mentioned it is important to consider applying a primer before applying any type of paint to the bare steel. Lets look at those commonly used for stainless steel paint. Types of Paints for Stainless SteelĪs with many other substrates for painting, there are different types of paint available. Manufacturers have their own proprietary versions of the systems, and will provide advice.Ĭold rolled stainless steel with a 2B or BA finish has a smooth surface profile, and requires a primer coat to ensure good adhesion. The appropriate paint system depends on the application, the surface condition of the steel, and the degree of protection required. Consult the paint supplier for details.Ĭleanliness can be checked by ensuring that the surface dries water break free. Water soluble solvent degreasers are most easily used. DegreasingĪll fabrications should be degreased to remove the shop soil almost inevitably picked up while being worked. Use only clean, uncontaminated consumables intended for use on stainless steel. Small areas can be cleaned with a stainless steel wire brush, disc grinder, flap wheel or other abrasive. Other methods of preparing stainless steel for painting It is advisable to passivate the stainless surface with nitric acid after blasting to remove any possible carbon steel contamination and ensure optimum corrosion resistance. Suitable blasting media are washed silica sand, stainless steel shot, glass beads. Blasting media must be clean, free from metallic iron, not previously used on carbon steel and free from chlorides. This method of cleaning is particularly useful for large structures and is highly effective in removing mill scale. Thorough rinsing after pickling is essential. Consult Austral Wright Metals for details. Mill scale on HRA and welding or heat treatment heat tints can be removed by pickling with pickling paste, or by immersion in a mixture of nitric and hydrofluoric acids. Also do not use steel wool during preparation as this is typical made of carbon steel which can leave residues causing rusting on the surface of the stainless steel surface. ![]() The recommendations of the paint manufacturer should be followed. The cleaning required depends on the intended application as well as the coating system to be used. How To Prepare Stainless Steel for PaintingĬleaning is usually carried out after welding or fabrication, including removing heat tint from welds. The preparation required will depend on the surface finish of the stainless steel. Surface preparation prior to paint a stainless steel surface is as important as it is for carbon steel. ![]() Painting may actually reduce the corrosion resistance, but may be required for other reasons such as product marking or identification, or for the protection of carbon steel welded to it. Stainless steels have an aesthetically pleasing appearance, and can be further polished or painted to enhance this feature.
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