| 摘要 |
[Problem] To provide: a surface treatment agent for a metal material that is capable of forming a corrosion-resistant film and has excellent liquid stability; and a metal material with a metal surface treatment film formed by said surface treatment agent. [Solution] Said problem is solved by a surface treatment agent for a metal material characterized: in containing an alkali metal salt (component a) and a nitrate (component b) of zirconium carbonate, and one or more organic polymers (component c) selected from urethane resins, epoxy resins, acrylic resins, phenol resins, polyester resins, polyvinyl resins, polyolefin resins and natural polymers; and the pH being greater than 7 and not more than 12. |
