▎ 摘　　要

NOVELTY - The utility model claims a protective layer structure of cyanide-free cadmium plating and electrophoretic painting, comprising a metal substrate, a non-cyanide cadmium plating layer, a phosphate layer and an electrophoretic paint coating orderly prepared from inside to outside on the metal substrate. the advantages of the utility model are as follows: the prepared protective layer has high wear resistance and corrosion resistance; it is suitable for preparing high corrosion resistance coating in various strong corrosion environment; it has good market prospect.