铈盐封孔对6061铝合金阳极氧化膜耐蚀性的影响  

Effect of Cerium Salt Sealing on Corrosion Resistance of Anodic Oxide Film of 6061 Aluminum Alloy

作　　者：刘莉[1] 张鲲[1,2] 骆晓伟 宁淑红 董立新[1] 刘艳[1,2] 陈辉[1,2] 

机构地区：[1]西南交通大学材料科学与工程学院,成都610031 [2]西南交通大学四川省先进焊接及表面工程技术研究中心,成都610031

出　　处：《腐蚀与防护》2016年第4期274-278,288,共6页Corrosion & Protection

基　　金：国家自然科学基金资助项目(51201144);中国博士后科学基金资助项目(2013M542288);中央高校基本科研业务费科技创新项目(SWJTU11CX051)

摘　　要：为提高6061铝合金阳极氧化膜的耐蚀性,利用铈盐溶液对其进行封孔处理。用电化学阻抗谱(EIS)和浸泡试验研究了不同工艺铈盐封孔后的氧化膜在质量分数3.5%NaCl溶液中的耐蚀性。同时,通过剥蚀试验对比研究了铈盐封孔与铝溶胶封孔和沸水封孔的效果。结果表明:氧化膜在30℃下铈盐封孔150min可获得较好的耐蚀性;铈盐封孔氧化膜的耐蚀性略低于沸水封孔氧化膜的,但优于溶胶封孔氧化膜的。In order to improve the corrosion resistance of 6061 aluminum alloy,the anodic films were sealed with rare earth cerium salt solution.Electrochemical impedance spectroscopy（EIS）and immersing tests were used to study the corrosion behavior of the anodic films sealed in cerium salt solution with different parameters in 3.5mass%NaCl solution.And the sealing effect of cerium salt was compared with that of sealing in aluminum sol and boiling water.The results show that the film sealing in cerium salt at 30 ℃ for 150 min presented relatively good corrosion resistance,although it was slightly inferior in corrosion resistance to the film sealed by boiling water,but it provided better corrosion resistance than that by the sol-gel method.

关 键 词：铝合金 铈盐封孔 电化学阻抗 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]