铝合金稀土转化膜工艺及性能研究  

Study on Process and Properties of Rare Earth Conversion Coatings on Aluminum Alloys

作　　者：张明申 王修春 许斌[1] 周吉学 赵东清 苏海通 Zhang Mingshen;Wang Xiuchun;Xu Bin;Zhou Jixue;Zhao Dongqing;Su Haitong(School of Materialscience and Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Provincial Key Laboratory of Highstrength Lightweight Metallic Materials,Advanced Materials Institute, Qilu University of Technology(Shandong Academy ofsciences),Jinan 250014,China;Shandong institute for product quality inspection,Jinan 250102,China)

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101 [2]齐鲁工业大学(山东省科学院)山东省科学院新材料研究所山东省轻质高强金属材料重点实验室,山东济南250014 [3]山东省产品质量检验研究院,山东济南250102

出　　处：《山东化工》2019年第8期12-15,共4页Shandong Chemical Industry

基　　金：国家重点研发计划子课题(2017YFB0103904)

摘　　要：以Ce(NO_3)_3为主要成膜剂,采用正交试验法和单因素试验法研究了6061铝合金的稀土转化成膜工艺,并对转化膜的表面形貌、成分和耐蚀性进行了分析。试验结果表明:转化膜为棕黄色;转化膜中含有铈、锰元素;稀土转化处理的铝合金硫酸铜点滴试验达到340 s以上,电化学测试自腐蚀电流密度icorr相比铝合金基体降低了2个数量级,极化电阻约是未处理的93倍,有效提高了铝合金的耐蚀性能。Using Ce(NO 3) 3 as the main film forming agent,the rare earth conversion process of 6061 aluminum alloy was studied by orthogonal test and single factor test,and the surface morphology,composition and corrosion resistance of the membrane were analyzed.this paper addressed the process of rare earth conversion of 6061 aluminum alloy,using Ce(NO 3) 3 as the main film-forming agent,the film formation process and film properties were studied by orthogonal test and single factor test.The test results show that,the conversion film is brownish yellow;the transformation membrane contains Cerium and manganese elements,Moreover,the copper sulfate spot test of the rare earth conversion film reaches 340s;the self-corrosion current density is reduced by two orders of magnitude;the polarization resistance is about 93 times that of the untreated,which effectively improves the corrosion resistance of the aluminum alloy.

关 键 词：6061铝合金 稀土转化膜 Ce(NO3)3 耐蚀性 电化学测试 

分 类 号：TG178.2[金属学及工艺—金属表面处理]