Effect of plasma nitriding on behavior of austenitic stainless steel 304L bipolar plate in proton exchange membrane fuel cell
Effect of plasma nitriding on behavior of austenitic stainless steel 304L bipolar plate in proton exchange membrane fuel cell
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DOI：
10.1016/j.jpowsour.2006.09.053
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发表时间：
2007
影响因子：
9.2
通讯作者：
R. Tian;J. C. Sun;Liang Wang
中科院分区：
文献类型：
--
作者：
R. Tian;J. C. Sun;Liang Wang
采用低温等离子体渗氮技术在304L奥氏体不锈钢表面获得了一层致密、高电导率的过饱和氮层。采用电化学和电阻测量方法研究了等离子渗氮对奥氏体不锈钢304L在0.05M H2SO4+2ppm F−模拟质子交换膜燃料电池（PEMFC）环境中的腐蚀行为和界面接触电阻（ICR）的影响。实验结果表明，在PEMFC运行条件下，在指定的阳极或阴极电位下进行恒电位极化后，形成了稳定的钝化膜，等离子体渗氮略微提高了304 L的耐腐蚀性，并显着降低了ICR。恒电位极化4h后，等离子体渗氮304L的ICR增大，在150Ncm−2的压力下，ICR小于100mΩ cm 2。
A dense and supersaturated nitrogen layer with higher conductivity is obtained on the surface of austenitic stainless steel 304L by the low temperature plasma nitriding. The effect of plasma nitriding on the corrosion behavior and interfacial contact resistance (ICR) for the austenitic stainless steel 304L was investigated in 0.05M H2SO4+2ppm F−simulating proton exchange membrane fuel cell (PEMFC) environment using electrochemical and electric resistance measurements. The experiment results show that the stable passive film is formed after the potentiostatic polarization at the specified anodic or cathodic potentials under PEMFC operation condition, and the plasma nitriding improves slightly the corrosion resistance and decreases markedly the ICR of 304L. The ICR of the plasma nitrided 304L increases after the potentiostatic polarizations for 4h, and lower than 100mΩcm2at the compaction force of 150Ncm−2.