高纯铝箔在混合酸溶液中蚀孔的引发和生长机理  

The Initiation And Growth Mechanism of Etchpit for High Purity Aluminum Foil in Mixed Acid Solutions

作　　者：徐友龙[1] 曹婉真[1] 孟中岩[2] 

机构地区：[1]西安交通大学 [2]上海大学

出　　处：《西安交通大学学报》1997年第1期1-6,共6页Journal of Xi'an Jiaotong University

摘　　要：通过恒电流实验研究了高纯铝箔在混合酸溶液中不同腐蚀时间时的试样表面形貌，探讨了蚀孔的引发和生长过程．对腐蚀区和未腐蚀区进行ＥＤＡＸ微量元素分析，初步提出蚀孔的引发和生长控制模型。The high purity aluminum foils are galvanostatically etched in an aqueous solution of hydrochloric acid, sulfuric acid, sodium dichromate and hydrofluoric acid. The morphology of the foil surface within different etching time observed by SEM shows that the etchpits are in a cluster during the first thirty seconds and then uniformly distributed over subsequent thirty seconds. The elements detected by EDAX reveal that the content of Cu, Fe and Cr in etched region is obviously greater than that in an unetched region where the Cu and Fe are segregated from the foils as the impurity and the Cr is induced from forming conversion coating. The conversion coating controlled model for initiation and growth of etchpits is proposed.

关 键 词：铝箔 引发 生长 腐蚀 混合酸溶液 孔蚀 

分 类 号：TG172.63[金属学及工艺—金属表面处理]