| abstract |
PROBLEM TO BE SOLVED: To provide a rust preventive agent for a metal surface and a surface-treated metal product capable of forming a rust preventive layer having excellent corrosion resistance and water resistance. An aqueous dispersion comprising an ionomer resin (A) neutralized with a monovalent metal and a divalent metal (A), an ionomer resin (B) neutralized with ammonia or an amine, and water, wherein (A) and (B) ), The monovalent metal content is 0.6 or less (chemical equivalent) and the divalent metal content is 0.05 to A rust preventive agent for a metal surface blended to 0.8 (chemical equivalent) is applied to the metal surface and dried. Thereby, a surface-treated metal product excellent in corrosion resistance and water adhesion can be obtained. |