| 摘要 |
The invention relates to a process for the coating of surfaces of a metallic component by contacting the surfaces of the metallic component with an aqueous composition that contains predominantly organic polymeric material whereby the aqueous composition contains at least one compound each of: A) organic film-forming polymeric material(s) selected from the group consisting of ionomeric copolymers, copolymers chemically related to ionomeric copolymers showing nearly or totally the properties of ionomeric copolymers and their corresponding monomers, comonomers, oligomers, cooligomers, polymers, blockcopolymers as well as their esters, salts and derivates, which all together are constituents of at least 80 % by weight of the total organic polymeric material and whereby the total organic polymeric material has an average acid number in the range from 20 to 300, A') optionally at least one further organic film-forming polymer or their corresponding monomer(s), oligomer(s), copolymer(s), blockcopolymer(s), their derivates or any combination of them that do not belong to A) participating in the rest of the total organic polymeric material to 100 % by weight, B) optionally neutralizing agent(s), C) cross-linking agent(s) and D) water, whereby the pH of the aqueous composition is at the beginning of the coating process in the range from 6 to 10.5. |
