TIN-PLATED STEEL SHEET AND METHOD FOR PRODUCING SAME

摘要

A tinned steel sheet includes an Sn-containing plating layer which is disposed on at least one surface of a steel sheet and in which the mass per unit area of Sn is 0.05 to 20 g/m 2 ; a first chemical conversion coating which is disposed on the Sn-containing plating layer, which contains P and Sn, and in which the mass per unit area of P is 0.3 to 10 mg/m 2 ; a second chemical conversion coating which is disposed on the first chemical conversion coating, which contains P and A1, and in which the mass per unit area of P is 1.2 to 10 mg/m 2 and the mass per unit area of Al is 0.24 to 8.7 mg/m 2 ; and a silane coupling agent-treating layer which is disposed on the second chemical conversion coating and in which the mass per unit area of Si is 0.10 to 100 mg/m 2 . The steel sheet can suppress the deterioration of appearance and the reduction of paint adhesion due to the surface oxidation of a tin plating layer without using Cr and which can be subjected to chemical conversion at low cost.