质子膜燃料电池是极具发展潜力的绿色能源,金属双极板取代石墨双极板是燃料电池发展的趋势.但金属双极板耐腐蚀性差,接触电阻高,需要对金属表面进行改性处理.本文采用新型Fe-Ni-Cr合金,对合金双极板进行表面化学改性处理.利用电子探针(EPMA)对改性后的金属双极板表面形貌及成分进行分析,结合不同工艺条件下材料耐腐蚀性能,认为金属表面经改性处理后形成致密氧化膜能提高双极板耐腐蚀性能,电子探针探测金属表面多个微区的氧含量,以及氧含量分布的均匀性,能够合理解释不同工艺条件所引起的耐腐蚀性能的差异.%Proton exchange membrane fuel cell (PEMFC) is a kind of most promising and-friendly power source. The bipolar plate is an important component of PEMFC. Metal plate is considered as a good candidate material for bipolar plate, but it is limited to use as a bipolar plate due to its corrosion problem and high interfacial contact resistance. Various chemical treatments are performed with Fe-Ni-Cr alloy, Electron probe microanalysis (EPMA) is used to detect the microstructure and chemical composition analysis. Combined with the analysis of corrosion, the result shows that the passive film on the alloy after chemical treatments can improve the corrosion property of the plate. The distribution of oxygen and its content detected by EPMA offers proper expansion for the difference among various chemical treatments.
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