Corrosive characteristics of surface-modified stainless steel bipolar plate in solid polymer fuel cell
Corrosive characteristics of surface-modified stainless steel bipolar plate in solid polymer fuel cell
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DOI：
10.1142/s0217984915400011
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发表时间：
2015-04
影响因子：
1.9
通讯作者：
Xiaowen Zhang;Lixia Wang;Juncai Sun
中科院分区：
文献类型：
--
作者：
Xiaowen Zhang;Lixia Wang;Juncai Sun
本文研究了经铌或氮化铌改性的AISI 304不锈钢（分别记作Nb-N304 SS和Nb-N304 SS）在模拟固体聚合物燃料电池（SPFC）运行条件下的腐蚀行为。动电位极化曲线表明，与裸304不锈钢相比，表面改性后的304不锈钢在模拟阳极SPFC环境中的腐蚀电位正移，腐蚀电流密度显著降低。在腐蚀电位、腐蚀电流密度和点蚀电位方面，Nb-N304 SS的耐蚀性顺序为：Nb-N304 SS >渗层304 SS >裸层304 SS。结果表明，在甲醇燃料的SPFC工况下，随着甲醇浓度的增加，裸板和钝化板的耐腐蚀性能均有所提高。
In this paper, corrosion behavior of an AISI 304 stainless steel modified by niobium or niobium nitride (denoted as niobized 304 SS and Nb-N 304 SS, respectively) is investigated in simulated solid polymer fuel cell (SPFC) operating conditions. Potentiodynamic polarizations show that the corrosion potentials of surface modified 304 SS shift to positive direction while the corrosion current densities decrease greatly comparing with the bare 304 SS in simulated anodic SPFC environments. The order of corrosive resistance in corrosive potential, corrosive current density and pitting potential is: Nb-N 304 SS > niobized 304 SS > bare 304 SS. In the methanol-fueled SPFC operating conditions, the results show that the corrosion resistance of bare and niobized 304 SS increases with the methanol concentration increasing in the test solutions.