METHOD OF TREATING SURFACE OF METAL BASE, METALLIC MATERIAL TREATED BY THE SURFACE TREATMENT METHOD, AND METHOD OF COATING THE METALLIC MATERIAL

摘要

A method of treating the surface of a metal base which is conducted prior to cationic electrodeposition coating and is used for improving throwing power in the cationic electrodeposition coating; a metallic material treated by the surface treatment method; and a method of coating this metallic material.