Corrosion resistance of chromized 316L stainless steel for PEMFC bipolar plates

被引：71

作者：

Cho, K. H. ^{[1
]}

Lee, W. G. ^{[1
]}

Lee, S. B. ^{[1
]}

Jang, H. ^{[1
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136701, South Korea

来源：

JOURNAL OF POWER SOURCES | 2008年 / 178卷 / 02期

关键词：

bipolar plates; PEM fuel cell; chromizing; corrosion; stainless steel;

D O I：

10.1016/j.jpowsour.2007.09.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Corrosion resistance of the chromized 316L stainless steel was studied in a proton exchange membrane fuel cell (PEMFC) operating condition. Cr-rich surface layer was formed by pack cementation technique and electrochemical properties of the chromized surface were examined by potentiodynamic and potentiostatic tests. Results showed that the Cr-rich layers underneath the free surface passivated the surface and protect the surface from corrosion in 0.5 M H2SO4 solution at 80 degrees C. However, the Cr-rich layers showed columnar grains with voids when the stainless steel was pack cemented for an extended period of time, resulting in drastic degradation of corrosion resistance. The optimum condition for the best corrosion resistance in the PEMFC operating condition was obtained without sacrificing the interfacial contact resistance. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：671 / 676

页数：6

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