| abstract |
The invention relates to a method for coating a metallic surface with an aqueous composition, wherein the composition in addition to water a) as an essential constituent an organic film former of at least one synthetic resin containing from 70 to 100% by weight of the content of synthetic resin (s) in the organic film former at least one water-soluble or / and water-dispersed synthetic resin in the form of polymers, copolymers, block copolymers or / and Graft copolymers based on synthetic resins, selected from the group consisting of polycarbonate, polyurethane, ionomer, poly (meth) acrylate, polyester, polyether or / and polystyrene, wherein the content of polycarbonate and polyurethane is in each case at least 10 wt .-% . b) at least one long-chain alcohol as film-forming assistant for the organic film-forming agent, c) at least one crosslinker, d) at least one lubricant as well e) at least one substance based on silane, silanol and / or siloxane or / and at least one inorganic compound in particle form having a mean particle diameter, measured on a scanning electron microscope in the range of 0.005 to 0.3 μm in diameter, and f) optionally containing at least one organic corrosion inhibitor, at least one organic solvent or / and at least one additive, wherein the metallic surface is contacted with the aqueous composition and a polymeric film is deposited on the metallic surface. |