METAL MATERIAL WITH A BISMUTH FILM ATTACHED AND METHOD FOR PRODUCING SAME, SURFACE TREATMENT LIQUID USED IN SAID METHOD, AND CATIONIC ELECTRODEPOSITION COATED METAL MATERIAL AND METHOD FOR PRODUCING SAME

摘要

Provided is a metal material with a bismuth film attached, which has excellent coating properties, corrosion resistance and paint film adhesion, and which can be produced with little impact on the environment.  The metal material with a bismuth film attached has a layer containing bismuth on at least part of the surface of the metal material, the numerical proportion of bismuth atoms at the surface layer of said metal material with a bismuth film attached being 10% or above.