Surface-treated metal material and aqueous metal surface treatment agent

摘要

A surface-treated metal material according to the present invention is a metal material the surface of which is coated with a composite film comprising an organic silicon compound (W) having cyclic siloxane bonds, at least one type of metal compound (X) selected from the group consisting of titanium compounds and zirconium compounds, a phosphoric acid compound (Y), and a fluorine compound (Z). In each component of the composite film, the ratio (X