质子交换膜燃料电池用不锈钢双极板氮化Cr镀层的耐蚀性  

Corrosion Resistance of Cr Coating Treated by Nitriding on Stainless Steel Bipolar Plate fo Proton Exchange Membrane Fuel Cell

作　　者：朱雁雁 沈喜训 王涛[4] 邓呈维 徐群杰 ZHU Yanyan;SHEN Xixun;WANG Tao;DENG Chengwei;XU Qunjie(Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai 200090,China;Shanghai Engineering Research Center of Heat-Exchange System and Energy Saving,Shanghai 200090,China;Shanghai Institute of Space Power-Sources,Shanghai 200245,China)

机构地区：[1]上海电力大学,上海200090 [2]上海市电力材料防护与新材料重点实验室,上海200090 [3]上海热交换系统节能工程技术研究中心,上海200090 [4]上海空间电源研究所,上海200245

出　　处：《腐蚀与防护》2023年第4期1-8,14,共9页Corrosion & Protection

基　　金：上海市科委项目(18511110902);国家自然科学基金(21972090)。

摘　　要：采用液相等离子体电解渗氮技术在镀有纯Cr镀层的316L不锈钢双极板上进行短时的氮化处理。采用扫描电子显微镜、X射线衍射仪等对Cr氮化镀层的形貌和成分进行了表征,采用电化学试验测试了其耐蚀性,并测量了镀层的界面接触电阻(RIC)。结果表明:Cr氮化镀层的表面呈现出凹凸不平的胞状结构、层镀为非晶相结构;与基体试样相比,Cr氮化镀层的腐蚀电位明显更高(约为+600 mV),腐蚀电流密度比不锈钢基体降低两个数量级,耐蚀效率为99.67%;Cr氮化镀层的RIC为13.7 mΩ·cm^(2),导电性能良好。The liquid phase plasma electrolytic nitriding technology was used to conduct short-term nitriding treatment on 316L stainless steel bipolar plate with pure Cr coating.The morphology and composition of Cr nitrided coating were characterized by scanning electron microscope and X-ray diffraction.Its corrosion resistance was tested by electrochemical test,and the interface contact resistance(Ric)of the coating was measured.The results showed that the surface of Cr nitrided coating presented uneven cellular structure,and the coating was amorphous structure.Compared with substrate sample,the corrosion potential of Cr nitrided coating was significantly high(about+600 mV),the corrosion current density was two orders of magnitude lower than that of stainless steel substrate,and the corrosion resistance efficiency was 99.67%.The Ric of Cr nitrided coating was 13.7 mΩ·cm^(2),which had good conductivity.

关 键 词：电沉积 液相等离子体渗氮 不锈钢双极板 耐蚀性 导电性 

分 类 号：TG174[金属学及工艺—金属表面处理]