| abstract |
The present invention relates to a multi-stage method for applying a weldable anti-scale coat to steel, in which first of all a thin silicatic layer free from metal pigments is produced on the metallic steel surface, and subsequently a wet film of a curable, pigment-containing paint is applied and cured, the curable, pigment-containing paint comprising, in solution in a liquid phase, a binder, which comprises hydrolysates and/or condensates of at least one silane/siloxane and/or at least one silicone resin, and also comprises at least one metallic pigment of aluminium and at least one metallic pigment of bismuth, in each case in particulate form. The present invention further relates to a preferred curable, pigment-containing paint formula for application in the method of the invention, and also to a hot forming operation on semi-finished steel products coated in the method of the invention. Also encompassed by the present invention is a hot-formed steel component suitable for electrical spot welding processes and for the application of an organic paint film system which affords protection from corrosion and which is obtainable in the method of the invention. |