| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal surface treatment agent capable of fully satisfying needs for discoloration resistance and corrosion resistance of a metal, especially a metal surface treatment agent capable of fully satisfying needs for discoloration resistance and corrosion resistance of 2 or more kinds of metals with one time treatment in a member having two or more kinds of metal surfaces.SOLUTION: A surface treatment agent for a metal contains at least one kind of organic compound having a mercapto group and a nonionic surfactant, and has a pH of 3 or less. |
