固体高分子形燃料電池セパレータ用ステンレス鋼およびその製造方法

摘要

PROBLEM TO BE SOLVED: To provide a solid polymer fuel cell separator which is capable of maintaining low contact resistance in its use environment and is excellent in durability.SOLUTION: An Sn-based film which satisfies a thin-film X-ray diffraction peak intensity ratio FeSn/FeSnof FeSn to FeSnin the Sn-based film of 2.4 or larger is formed on a surface of a stainless steel.