SURFACE-TREATED METAL MATERIAL AND METHOD FOR PRODUCING THE SAME

摘要

Disclosed is a surface-treated metal material comprising a composite coating film which is obtained by applying an aqueous metal surface treatment agent over the surface of a metal material and drying the agent thereon. The aqueous metal surface treatment agent is composed of an organosilicon compound (W) obtained by blending a silane coupling agent (A) having one amino group in a molecule and a silane coupling agent (B) having one glycidyl group in a molecule at a solid content mass ratio [(A)/(B)] of 0.7-1.7, at least one fluorocompound (X) selected from titanium hydrofluoric acid and zirconium hydrofluoric acid, phosphoric acid (Y), a vanadium compound (Z) and a lubricating agent (J).