Sn-plated steel sheet
The Sn-plated steel sheet of the disclosure is an Sn-plated steel sheet including: a steel sheet; an Sn plating layer formed on at least one side of the steel sheet and containing, based on % by mass, from 0.1 g/m 2 to 15 g/m 2 of metal Sn; and a coating layer formed on the surface of the Sn plating layer and containing zirconium oxide and tin oxide; in which the content of the zirconium oxide in the coating layer is from 0.2 mg/m 2 to 50 mg/m 2 in terms of metal Zr amount, and the peak position of binding energy of Sn3d 5/2 according to X-ray photoelectron spectroscopy of the tin oxide in the coating layer is 1.6 eV or higher than the peak position of binding energy of the metal Sn.
1. An Sn-plated steel sheet comprising:
a steel sheet;
an Sn plating layer formed on at least one side of the steel sheet and containing from 0.1 g/m 2 to 15 g/m 2 of metal Sn; and
a coating layer formed on the surface of the Sn plating layer and containing zirconium oxide and tin oxide;
wherein a content of the zirconium oxide in the coating layer is from 0.2 mg/m 2 to 50 mg/m 2 in terms of metal Zr amount, and
a peak position of binding energy of Sn3d 5/2 according to X-ray photoelectron spectroscopy of the tin oxide in the coating layer is 1.6 eV or higher than a peak position of binding energy of the metal Sn.
2. The Sn-plated steel sheet according to claim 1 , wherein a thickness of the coating layer is from 2 nm to 100 nm.
3. The Sn-plated steel sheet according to claim 1 , wherein the coating layer further contains phosphorus and a P amount/a metal Zr amount is from 0.2 to 1 in terms of mass ratio per unit area.
4. The Sn-plated steel sheet according to claim 2 , wherein the coating layer further contains phosphorus and a P amount/a metal Zr amount is from 0.2 to 1 in terms of mass ratio per unit area.