COATING FILM AND METAL AUTOMOTIVE PART ON WHICH COATING FILM IS FORMED AND CONSTANT VELOCITY UNIVERSAL JOINT

摘要

Provided are: a coating film that exhibits excellent adhesion even if a chemical conversion coating process is not carried out as a primer process; and a metal automotive part having said coating film. By depositing a powder on the surface of a metal automotive part that has been quenched after being forged using a powder coating method and then simultaneously tempering the metal automotive part and bake hardening the deposited powder a coating film is formed on the surface of the metal automotive part. The surface of the metal automotive part before the powder has been deposited using the powder coating method serves as a work hardened base surface that has not undergone a chemical conversion coating process.