J. Mater. Sci. Technol. ›› 2024, Vol. 176: 57-68.DOI: 10.1016/j.jmst.2023.09.002

• Research article • Previous Articles     Next Articles

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

Mingyang Wanga, Yuanyuan Jia, Da-Hai Xiaa,*, Dejing Zhoua,b, Yesen Zhuc,*, Zhiming Gaoa, Zhenbo Qina, Wenbin Hua   

  1. aSchool of Materials Science and Engineering, Tianjin University, Tianjin 300350, China;
    bYin Bang Clad Mat Co Ltd, Jiangsu Key Lab Clad Mat, Wuxi 214145, China;
    cPowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China
  • Received:2023-08-13 Revised:2023-08-31 Accepted:2023-09-06 Published:2024-03-20 Online:2024-03-15
  • Contact: *E-mail addresses: dahaixia@tju.edu.cn (D.-H. Xia), zhu_ys4@hdec.com (Y. Zhu).
  • About author:Dr. Da-Hai Xia is an Associate Professor at the school of Materials Science and Engineering, Tianjin University. He received his PhD degree from Tianjin University (China) in 2012. He then joined the University of Alberta (Canada) as a Postdoctoral fellow (2013–2014) under the guidance of Prof. Jing-Li Luo. His research interests are interdis-ciplinary studies of corrosion, electrochemistry and sur-face science. He served as the Associate Editor of Anti-Corrosion Methods and Materials (2022~) and Corrosion Communications (2022~).

Abstract: 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.

Key words: Al alloy composite sheet, Localized corrosion, Electrochemical behavior