Effect of substrate orientations on the electrochemical and localized corrosion behavior of a quad-layer Al alloy composite  

作　　者：Mingyang Wang Yuanyuan Ji Da-Hai Xia Dejing Zhou Yesen Zhu Zhiming Gao Zhenbo Qin Wenbin Hu 

机构地区：[1]School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China [2]Yin Bang Clad Mat Co Ltd,Jiangsu Key Lab Clad Mat,Wuxi 214145,China [3]PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China

出　　处：《Journal of Materials Science & Technology》2024年第9期57-68,共12页材料科学技术（英文版）

基　　金：financed by the National Key Research and Development Program(No.2022YFB3705801);the National Natural Science Foundation of China(Nos.52031007 and 52171077).

摘　　要：Electrochemical and localized corrosion behavior of a 4045/7072/3003 M/4045 Al alloy composite in 3.5 wt.%NaCl solution was investigated from cross-sectional and plane directions by electrochemical impedance spectroscopy,polarization curves,and high-resolution microscopic examination.Plane directions showed higher corrosion resistance than the cross-sectional surface,with almost all localized corrosion initiated from Si-containing inclusions.The cross-section showed a complex galvanic effect among the four layers,the galvanic coupling between 4045/7072 accelerated the dissolution of 7072 because 7072 served as the anode,however,the galvanic coupling between 3003 M/4045 protected 4045 from corrosion,indicating that 3003 M served as the anode.

关 键 词：Al alloy composite sheet Localized corrosion Electrochemical behavior 

分 类 号：TG14[一般工业技术—材料科学与工程]