Corrosion behavior of the second phase in Mg-9Gd-3Y-2Zn-0.5Zr alloy under simulated coastal storage environment

被引：2
|
作者：
Chen, Junhang [1 ]
Zhang, Chao [2 ]
Hu, Zhihao [1 ]
Tan, Yao [1 ]
Zou, Shiwen [2 ]
Gao, Jin [1 ]
Zhang, Xin [3 ]
Xiao, Kui [1 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Natl Mat Corros & Protect Data Ctr, Beijing 100083, Peoples R China
[2] Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China
[3] Univ Sci & Technol Beijing Co Ltd, Testing Ctr, Beijing 100083, Peoples R China
来源：
NPJ MATERIALS DEGRADATION | 2024年 / 8卷 / 01期
关键词：
MICRO-GALVANIC CORROSION; MAGNESIUM ALLOY; MG; GD;
D O I：
10.1038/s41529-024-00492-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Mg-9Gd-3Y-2Zn-0.5Zr alloy was studied for its long-term corrosion behavior in a simulated coastal storage environment. The results show that the Mg12 (Y, Gd) Zn phase in the Mg-9Gd-3Y-2Zn-0.5Zr alloy forms a galvanic couple with alpha-Mg, and the Mg12 (Y, Gd) Zn phase acts as a cathode to accelerate alpha-Mg during the corrosion initiation period. The corrosion of the anode is subsequently transformed into corrosive dissolution of the anode. With the dissolution of the Mg12 (Y, Gd) Zn phase, elements such as Gd and Y are gradually distributed into the entire corrosion product layer, improving the protective performance of the corrosion product layer by forming dense Gd2O3 and Y2O3.
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页数：11
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