铝合金表面润滑耐蚀复合镀层的制备及性能分析  

Preparation and Performance Analysis of Lubricating and Corrosion-resistant Composite Coating on Aluminum Alloy Surface

作　　者：肖金涛 鞠鹏飞 臧旭升 邢明秀 周宏 徐州 李忠建 XIAO Jintao;JU Pengfei;ZANG Xusheng;XING Mingxiu;ZHOU Hong;XU Zhou;LI Zhongjian(Shanghai Aerospace Equipments Manufacture Co.,Ltd,Shanghai 200245,China)

机构地区：[1]上海航天设备制造总厂有限公司,上海200245

出　　处：《中国表面工程》2021年第4期38-45,共8页China Surface Engineering

基　　金：国家自然科学基金(51771122);上海市优秀技术带头人计划(20XD1431400);上海市浦江人才计划(19PJ1431500)资助项目。

摘　　要：针对铝合金表面易磨损、易腐蚀的问题,开展铝合金阳极氧化和磁控溅射二硫化钼复合镀技术研究,制备润滑耐蚀复合镀层。通过表面形貌分析、摩擦磨损试验、电化学测试和磨痕分析,分别评价复合镀层的湿热存储前后的润滑性能、耐蚀性能和润滑机理。结果表明,当氧化膜厚度为15μm,溅射二硫化钼膜为2μm时,复合膜在载荷分别为1、5、10和20 N的往复运动模式下,湿热存储2 160 h前后的摩擦因数均小于0.1,摩擦寿命大于20 000次;采用EDS对磨痕的形貌和成分分析,表明复合膜层表面与9Cr18对偶件对磨时形成了转移膜,磨损机制为粘着磨损;采用动电位极化曲线分析,表明复合膜层主要通过提高铝合金表面的腐蚀电位来提高铝合金表面的耐蚀性。研究证明制备的复合镀层有效地提高了铝合金表面的润滑耐蚀性能,在航空航天领域有较好的应用前景。In order to solve the problem of easy wear and corrosion on the surface of aluminum alloy,the technology of anodic oxidation and magnetron sputtering molybdenum disulfide composite plating on aluminum alloy was studied.Through surface morphology analysis,friction and wear experiment,electrochemical test and wear scar analysis,respectively,the lubrication performance and resistance corrosion performance and lubrication mechanism were evaluated.Results show that when the oxide film thickness is 15 μm and molybdenum disulfide film is 2 μm,the friction coefficient of the composite film under the load of 1,5,10 and 20 N,in humidity and heat storage about 2 160 h with before and after,is less than 0.1,and the friction life are more than 20 000 times.Using EDS to analyze the morphology and composition of the wear scar,a transfer film is formed when the surface of the composite film layer is rubbed with the 9Cr18 counterpart,and the wear mechanism is adhesive wear.According to the analysis of the potential polarization curve,the composite film layer mainly improves the corrosion resistance of the aluminum alloy surface by increasing the corrosion potential of the aluminum alloy surface.The results show that the composite coating can effectively improve the lubrication and corrosion resistance of aluminum alloy surface,which has a good application prospect in the field of aerospace.

关 键 词：铝合金 阳极氧化 溅射二硫化钼 承载能力 润滑性能 耐蚀性能 

分 类 号：TG156.88[金属学及工艺—热处理] TB114.2[金属学及工艺—金属学]