Effect of indium and yttrium on the corrosion behavior of AZ63 magnesium alloy

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作者：
Guo, Chongqing [1 ]
Liu, Li [1 ]
Liu, Hao [1 ,2 ]
Qian, Feng [1 ]
Zhou, Yang [1 ]
Wang, Lei [1 ]
Li, Jiarun [1 ]
Wang, Jia [3 ]
机构：
[1] School of Environment and Safety Engineering, Qingdao University of Science and Technology, Shandong, Qingdao,266042, China
[2] Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Shandong, Qingdao,266071, China
[3] College of Chemistry and Chemical Engineering, Ocean University of China, Shandong, Qingdao,266100, China
来源：
Journal of Alloys and Compounds | 2024年 / 985卷
关键词：
Indium (In) and yttrium (Y) can activate and alleviate the corrosion of magnesium alloy; respectively. The effects of 1 wt% In and 1 wt% Y on the microstructure and electrochemical behaviors of Mg-6 wt%Al-3 wt%Zn (AZ63) magnesium alloy are investigated via materials characterizations associated with electrochemical techniques. The results showed that co-alloying of In and Y would increase the number of intermetallic phases in AZ63 by generating discrete Al2Y phase and continuous Mg17Al12 phase. During the process of corrosion; the corrosion of Mg-6 wt%Al-3 wt%Zn-1 wt%In-1 wt%Y(AZ63InY) initiates from the intermetallic phases and propagates locally. The corrosion products are apt to adhere on the corroded surface; underneath which a severe corrosion takes place due to the enhanced dissolution-reprecipitation effect of In on activating Mg. © 2024 Elsevier B.V;
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