Patent ID: 11965249
Assignee: NIPPON STEEL CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A surface-treated metal material, comprising:
a metal sheet;
a plating layer formed on the metal sheet and containing aluminum, magnesium, and zinc; and
a composite coating formed on a surface of the plating layer, the composite coating including an organic silicon compound; a zirconium compound and/or a titanium compound; a phosphoric acid compound; a fluorine compound; and a vanadium compound,
wherein, when a surface of the composite coating is analyzed at a spot size of φ30 μm using micro-fluorescent X-rays, a maximum value of V/Zn, which is a mass ratio of a V content to a Zn content, is 0,010 to 0,100.