Electrochemical behaviors of anodic alumina sealed by Ce-Mo in NaCl solutions  

作　　者：田连朋 赵旭辉 赵景茂 张晓丰 左禹 

机构地区：[1]School of Materials Science and Engineering,Beijing University of Chemical Technology

出　　处：《中国有色金属学会会刊：英文版》2006年第5期1178-1183,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(50571006) supported by the National Natural Science Foundation of China

摘　　要：The elimination of toxic materials in sealing methods for anodic films on 1070 aluminum alloy was studied. The new process uses chemical treatments in cerium solution and an electrochemical treatment in a molybdate solution. Potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) were used to study the influences of sealing methods on the corrosion behavior of anodic films in NaCl solutions. The results show that the Ce-Mo sealing makes the surface structure and morphology of anodic films uniform and compact. Ce and Mo produce a cooperative effect to improve the corrosion resistance of anodic films. Anodic films sealed by Ce-Mo provide high corrosion resistance both in acidic and basic solutions.The elimination of toxic materials in sealing methods for anodic films on 1070 aluminum alloy was studied. The new process uses chemical treatments in cerium solution and an electrochemical treatment in a molybdate solution. Potentiodynamic polarization and electrochemical impedance spectroscopy（EIS） were used to study the influences of sealing methods on the corrosion behavior of anodic films in NaCI solutions. The results show that the Ce-Mo scaling makes the surface structure and morphology of anodic films uniform and compact. Ce and Mo produce a cooperative effect to improve the corrosion resistance of anodic films. Anodic films sealed by Ce-Mo provide high corrosion resistance both in acidic and basic solutions.

关 键 词：铝合金 阳极镀层 密封 电化学阻抗谱 NACL溶液 

分 类 号：TG113.2[金属学及工艺—物理冶金]