Importance

Loading Importance Indicators...

Abstract

There is provided a separator for polymer electrolyte fuel cells having a substrate of a ferritic, having a chemical composition comprising, in mass %, C: 0.001 to 0.012%, Si: 0.01 to 0.6%, Mn: 0.01 to 0.6%, P: 0.035% or less, S: 0.01% or less, Cr: 22.5 to 35.0%, Mo: 0.01 to 4.5%, Ni: 0.01 to 2.5%, Cu: 0.01 to 0.6%, Sn: 0.01 to 1.0%, In: 0.001 to 0.30%, N: 0.015% or less, V: 0.01 to 0.35%, and Al: 0.001 to 0.050%, and the calculated value of {Content of Cr (%)+3×Content of Mo (%)} being 22.5 to 45.0, and includes a surface modified layer containing O: less than 30% and the balance: Sn and In. A polymer electrolyte fuel cell including the separator is remarkably excellent in corrosion resistance in an in-cell environment.

Loading the Abstract Image...

First Claim