Manufacturing method of Sn-plated steel sheet and Sn-plated steel sheet

摘要

The Sn-plated steel sheet according to the present invention includes a steel sheet, a Sn-plated layer provided on at least one surface of the steel sheet, and a film provided on the surface of the Sn-plated layer and containing zirconium oxide and tin oxide. Wherein the content of the zirconium oxide in the coating is 0.2 mg / m2 to 50 mg / m2 in metal Zr content, and the zirconium oxide is present as a zirconium oxide in the depth direction analysis by X-ray photoelectron spectroscopy. The depth position A where the element concentration of Zr is maximum is located closer to the surface of the coating than the depth position B where the element concentration of Sn present as tin oxide is maximum, and the depth The distance in the depth direction between the position A and the depth position B is 0.5 nm or more.