Electrochemical nitridation of a stainless steel for PEMFC bipolar plates
Electrochemical nitridation of a stainless steel for PEMFC bipolar plates
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DOI：
10.1016/j.ijhydene.2011.07.045
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发表时间：
2011-10
期刊：
影响因子：
--
通讯作者：
Heli Wang;J. Turner
中科院分区：
文献类型：
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作者：
Heli Wang;J. Turner
AISI 446钢在0.1MHNO3 + 0.5MKNO3溶液中进行了室温电化学氮化。XPS分析显示表面NH3和更深的氮化物层。电化学氮化改性的不锈钢表面层由氮结合的氧化物膜组成。氮化钢显示出非常低的界面接触电阻（约1000 Ω）。在140 N/cm 2下为18 m × cm 2），在模拟PEMFC环境中具有优异的耐腐蚀性。电化学氮化是一种经济的不锈钢表面改性方法，在燃料电池双极板上具有很好的应用前景。
AISI446 steel has been electrochemically nitrided in 0.1 M HNO3+ 0.5 M KNO3solution at room temperature. XPS analysis revealed surface NH3and a deeper nitride layer. The surface layer of the stainless steel modified by electrochemical nitridation was thus composed of a nitrogen-incorporated oxide film. The nitrided steel showed very low interfacial contact resistance (ca. 18 mΩ cm2at 140 N/cm2) and excellent corrosion resistance in simulated PEMFC environments. Electrochemical nitridation provides an economic way to modify the stainless steel’s surface, and is very promising for application to fuel cell bipolar plates.