Salt damage corrosion resistance and weld reliability excellent for automotive fuel tank and vehicle fuel pipe for the surface treatment of stainless steel plate and pipe expansion workability in excellent automobile refueling tube for surface treatment of stainless steel welded pipe

摘要

PROBLEM TO BE SOLVED: To provide a surface-treated stainless steel sheet having excellent corrosion resistance and excellent weld zone reliability under salt-attack-incurring environments, for an automotive fuel tank or an automobile fuel pipe, and to provide a welded pipe of the surface-treated stainless steel for an automobile fuel inlet pipe.;SOLUTION: This surface-treated stainless steel sheet includes: a stainless steel sheet substrate that contains, 0.030% or less of C, 2.00% or less of Si, 2.00% or less of Mn, 0.050% or less of P, 0.010% or less of S, 0.030% or less of N, 0.010 to 0.100% of Al, 10.00 to 25.00% of Cr, further contains one or more elements among 4.00% or less of Ni, 2.00% or less of Cu, 2.00% or less of Mo and 1.00% or less of V, one or two elements among 0.01 to 0.30% of Ti and 0.01 to 0.30% of Nb, and has a Y-value of -10.4 or less; and a corrosion-preventive plated layer formed on the surface, which mainly contains Sn and has a coating weight of 10 to 200 g/m² or less, or a corrosion-preventive plated layer formed on the surface, which mainly contains Sn and Zn of 0.8 to 10.0% and has a coating weight of 10 to 200 g/m².;COPYRIGHT: (C)2009,JPO&INPIT