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METHOD OF TREATING SURFACE OF METAL BASE, METALLIC MATERIAL TREATED BY THE SURFACE TREATMENT METHOD, AND METHOD OF COATING THE METALLIC MATERIAL
METHOD OF TREATING SURFACE OF METAL BASE, METALLIC MATERIAL TREATED BY THE SURFACE TREATMENT METHOD, AND METHOD OF COATING THE METALLIC MATERIAL
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机译:金属基体的表面处理方法,通过表面处理法处理的金属材料以及金属材料的被覆方法
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摘要
A method of treating the surface of a metal base which is conducted prior to cationic electrodeposition coating in order to improve throwing power in the cationic electrodeposition coating; a metallic material treated by the surface treatment method; and a method of coating this metallic material. The method of treating the metal surface of a metal base, which improves throwing power in cationic electrodeposition coating, comprises: a surface treatment step in which a metal surface treatment composition comprising zirconium ions and/or titanium ions and an adhesion promoter characterized by being at least one member selected from the group consisting of (A) silicon compounds, (B) adhesion-promoting metal ions, and (C) adhesion-promoting resins is brought into contact with a metal base to form a chemical conversion coating on the base; and a heat-drying step in which the metal base having the chemical conversion coating formed is heated at 60-190° for 30 seconds or longer to dry the coating.
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