SURFACE-TREATED METAL MATERIAL AND AQUEOUS METAL SURFACE-TREATMENT AGENT

摘要

A surface-treated metal material of the present invention has a composite film on the surface of a metal material. The composite film includes an organic silicon compound (W) having cyclic siloxane bonds, at least one metal compound (X) selected from a group consisting of a titanium compound and a zirconium compound, a phosphate compound (Y) and a fluorine compound (Z). In each of the components of the composite film, the ratio of X s/W s is from 0.06 to 0.16, where W s is a solid mass of Si derived from the organic silicon compound (W) and X s is a solid mass of at least one metal component selected from a group consisting of Ti and Zr included in the metal compound (X); the ratio of Y s/W s is from 0.15 to 0.31, where W s is the solid mass of Si and Y s is a solid mass of P derived from the phosphate compound (Y); and the ratio of Z s/ W s is from 0.08 to 0.50, where W s is the solid mass of Si and Z s is a solid mass of F derived from the fluorine compound (Z).