Corrosion Behavior of Al-Zn-Sn-Ga Alloy in NaCl Solution  

作　　者：贺俊光 

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

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第4期644-647,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Technology Creative Program of Henan for Excellent Talents (No.094200510019)

摘　　要：The corrosion behavior of Al-Zn-Sn-Ga alloy in 3.5% NaCl solution was investigated by corrosion morphology observation and electrochemical testing. The experimental results show that there exist three stages during the course of corrosion. At the initial stage, pitting occurs surrounding the precipitates, which is driven by the galvanic couple effect. At the middle stage, pitting rapidly extends toward the horizontal direction, forming the shallow circular structure caused by the deposition of Ga ions around Sn. At the final stage, the new active sites led to the continuous corrosion of the alloy.The corrosion behavior of Al-Zn-Sn-Ga alloy in 3.5% NaCl solution was investigated by corrosion morphology observation and electrochemical testing. The experimental results show that there exist three stages during the course of corrosion. At the initial stage, pitting occurs surrounding the precipitates, which is driven by the galvanic couple effect. At the middle stage, pitting rapidly extends toward the horizontal direction, forming the shallow circular structure caused by the deposition of Ga ions around Sn. At the final stage, the new active sites led to the continuous corrosion of the alloy.

关 键 词：ALUMINUM anodic dissolution MORPHOLOGY SEGREGATION 

分 类 号：TG171[金属学及工艺—金属表面处理]