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

A metal material is provided with a bismuth coating which enables the subsequent coating to be accomplished at a high throwing power, and has excellent corrosion resistance, coating adhesion and is able to be produced with reduced damage to the environment. The metal material has a surface and a bismuth-containing layer deposited on at least a part of the surface of the metal material, wherein the percentage of bismuth atoms in the number of atoms in the surface layer of the metal material with a bismuth coating is at least 10%.

主权项

1. A surface treating solution for use in a chemical conversion of a metal material surface conducted as a pretreatment of a coating, wherein the surface treating solution contains bismuth ions and a first ligand for the bismuth ions in an amount effective to form a bismuth chemical conversion film on the metal surface.