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

Claim 3:
4. The surface-treated metal material according to claim 1, wherein, in the composite coating, when analyzed with the micro-fluorescent X-rays at a spot size of φ2 mm,
an average value of (Zr+Ti)/Si, which is a ratio of a total solid content mass of Zr and/or Ti to a solid content mass of Si, is 0.06 to 0.15,
an average value of P/Si, which is a ratio of a solid content mass of P to the solid content mass of Si, is 0.15 to 0.25, and
an average value of V/Si is 0.01 to 0.10.