| 摘要 |
PURPOSE:To enhance the adhesive strength of a coated film by bringing a metal subjected to chemical conversion treatment into contact with an aqueous soln. contg. metallic ions of Fe, Zn, Ni, Mo or the like at a prescribed concn. before coating the metal. CONSTITUTION:A metallic plate for coating is subjected to chemical conversion treatment with an aqueous soln. of zinc phosphate, chromate or the like. An aqueous soln. contg. 10-10,000ppm metallic ions of >=1 kind of metal selected from Fe, Zn, Ni, Mo, Co, W, Mg, Mn and Si is prepared. The soln. is brought into contact with the treated metallic plate by spraying, dipping or electrolytic treatment to pretreat the metallic surface. Thus, the adhesive strength of a film coated on the metallic surface is enhanced. |
