铝合金微弧氧化/电泳复合涂层耐蚀减摩性能  

Corrosion resistance and antifriction properties of aluminum alloy micro-arc oxidation-electrophoretic composite coating

作　　者：尚少伟 朱新河[1] 马春生[1] 傅云徉 张焯凯 SHANG Shao-wei;ZHU Xin-he;MA Chun-sheng;FU Yun-yang;ZHANG Zhuo-kai(Marine Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《大连海事大学学报》2022年第1期113-119,共7页Journal of Dalian Maritime University

基　　金：辽宁省自然科学基金资助项目(2019-ZD-0148);中央高校基本科研业务费专项资金资助项目(3132019331,3132020191)。

摘　　要：为提升铸造铝合金(ZL109)材料的耐腐蚀及减摩性能,首先,采用微弧氧化技术在铝合金表面制备微弧氧化涂层;然后,将经过微弧氧化处理后的试样浸入由丙烯酸树脂与镀镍碳纳米管组成的电泳溶液中进行电泳沉积处理;最终,在ZL109表面制备了微弧氧化/电泳沉积复合涂层。利用SEM、EDS、划格试验等手段表征复合涂层形貌与结合特征,使用电化学工作站、摩擦磨损试验机对复合涂层的耐腐蚀及减摩性能进行检测分析。电化学腐蚀试验测试结果显示,经过微弧氧化-电泳沉复合处理后的试样腐蚀电流密度为8.891×10^(-7)A/cm^(2),较基体下降了三个数量级,极化电阻提高了277.46倍。在干摩擦条件下进行的摩擦磨损试验显示,经过微弧氧化/电泳沉复合处理后的试样相较铝合金基体,摩擦系数降低了约65%,较未添加镀镍碳纳米管的试样下降了25%。通过微弧氧化/电泳沉积复合技术,提高了铝合金材料的耐腐蚀和减磨性能,为铝合金材料的防护处理提供了参考。To improve the corrosion resistance and antifriction properties of cast aluminum alloy(ZL109),firstly,the micro-arc oxidation coating was prepared on the surface of aluminum alloy by micro-arc oxidation technology,and then the samples treated by micro-arc oxidation were immersed in the electrophoretic solution composed of acrylic resin and nickel-plated carbon nanotubes for electrophoretic deposition.Finally,the micro-arc oxidation/electrophoretic deposition composite coating was prepared on the surface of ZL109.The morphology and bonding characteristics of the composite coating were characterized by SEM,EDS and scratch test,and the corrosion resistance and antifriction properties of the composite coating were tested and analyzed by electrochemical workstation and friction and wear tester.The electrochemical corrosion test results show that the corrosion current density of the sample treated by micro-arc oxidation-electrophoretic precipitation is 8.891×10^(-7)A/cm^(2),which is three orders of magnitude lower than that of the matrix,and the polarization resistance is increased by 277.46 times.The friction and wear tests carried out under dry friction conditions show that the friction coefficient of the sample treated by micro-arc oxidation/electrophoretic precipitation is about 65%lower than that of aluminum alloy matrix and 25%lower than that of the sample without nickel-plated carbon nanotubes.The corrosion resistance and antifriction properties of aluminum alloy are improved by micro-arc oxidation/electrophoretic deposition,which provide a reference for the protective treatment of aluminum alloy.

关 键 词：铝合金 微弧氧化 电泳沉积 耐腐蚀 减摩 

分 类 号：TH117.1[机械工程—机械设计及理论]