Surface treatment agent for metal material, surface treatment method of metal material using the same, surface treatment metal material

摘要

The present invention can form an unprecedented new film having heat resistance, weldability, continuous processability, conductivity, fingerprint resistance and paintability on the surface of a metal material, and has excellent liquid stability. It aims at providing the surface treating agent for materials. The surface treatment agent for a metal material of the present invention contains two or more functional groups (a) represented by -SiR1R2R3 and a hydrophilic functional group (b) in one molecule, and the functional group (b) 1 At least one metal alkoxide having a compound (A) having a molecular weight per unit (average molecular weight / number of functional groups) in the range of 300 to 5,000 and one element selected from the group consisting of Si, Ti, and Zr ( B), at least one compound (C) selected from the group consisting of fluorine-containing compounds and phosphoric acid compounds, and at least one hydrophilic selected from the group consisting of carboxylic acid groups, phosphonic acid groups, and sulfonic acid groups An organic compound (D) having a functional functional group and water are contained.