Surface treated stainless steel sheet for automobile fuel tank excellent in corrosion resistance under salt corrosive environment

摘要

The present invention provides a surface treated stainless steel sheet for an automobile fuel tank excellent in corrosion resistance under a salt corrosive environment, that is, a surface treated stainless steel sheet for an automobile fuel tank excellent in corrosion resistance under a salt corrosive environment characterized by comprising a ferritic stainless steel sheet base material containing, by mass %, Cr: 10.0 to 25.0%, having an average r value of 1.4 or more, and having a total elongation of 30% or more or an austenitic stainless steel sheet base material containing Cr: 10.0 to 25.0%, having a total elongation of 45% or more, and having a work hardening rate of 400 N/mm² on the surface of which is formed a plating layer containing 5 to 13% of Si and having a balance of unavoidable impurities and Al by a weight of 5 g/m² to 80 g/m², between the plating layer and base iron is formed an alloy layer having a thickness of less than 5.0 μm, and on the plating layer of which is provided a lubricating film comprised of a soluble resin and, by mass %, 1 to 30% of a lubrication function imparting agent with respect to the soluble resin and having a friction coefficient of 0.15 or less.