17-4PH不锈钢无氰镀银封闭处理的耐腐蚀及抗微动磨损性能  

Corrosion and fretting wear resistance of cyanide-free silver coating electroplated on 17-4PH stainless steel after sealing

作　　者：张安琴 詹中伟 张骐 张昂 孙志华 ZHANG Anqin;ZHAN Zhongwei;ZHANG Qi;ZHANG Ang;SUN Zhihua(AECC Guiyang Engine Research Institute,Guiyang 550081,China;Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发贵阳发动机设计研究所,贵州贵阳550081 [2]中国航发北京航空材料研究院,航空材料先进腐蚀与防护航空科技重点实验室,北京100095

出　　处：《电镀与涂饰》2023年第13期36-44,共9页Electroplating & Finishing

基　　金：中国航发创新基金项目“无氰电镀技术研究”(ZZCX-2017-027)。

摘　　要：对航空发动机零件用17-4PH不锈钢表面无氰镀银后再封闭处理。通过酸性盐雾试验研究了无氰镀银+封闭处理试样的耐蚀性,并与氰化镀银,等离子喷涂CuNiIn涂层和CoCrAlYSi-hBN(六方氮化硼)复合涂层,以及空气喷涂干膜润滑涂层(DFL)的试样进行对比。在高温微动磨损试验后,采用白光干涉仪、扫描电子显微镜和能谱仪分析了上述5种防护层的摩擦因数、磨损率、磨痕微观形貌及元素分布。结果表明,无氰镀银+封闭处理试样具有最佳的耐腐蚀和抗微动磨损性能。A silver coating was electroplated from a cyanide-free bath and sealed on the surface of 17-4PH stainless steel used for aircraft engine part,and its corrosion resistance were studied by acidic salt spray test and compared with the coatings obtained by other surface modification technologies i.e.cyanide silver electroplating,plasma spraying of CuNiIn coating and CoCrAlYSi-hBN(hexagonal boron nitride)composite coating,and air spraying of dry film lubricant(DFL)coating.The friction coefficients and wear rates of the said coatings during high-temperature fretting wear test and the morphology and element distribution of the fretting traces on them were examined by using white light interferometer,scanning electron microscope,and energy-dispersive spectrometer.The results showed that the specimen treated by cyanide-free silver electroplating and sealing had the best corrosion and fretting wear resistance.

关 键 词：沉淀硬化马氏体不锈钢 无氰镀银 封闭 等离子喷涂 干膜润滑涂层 耐蚀性 微动磨损 

分 类 号：TQ153.16[化学工程—电化学工业] U177.2[交通运输工程]