The effects of a corrosion product film on the corrosion behavior of Mg-Al alloy with micro-alloying of yttrium in a chloride solution

被引:32
作者
Yang, Yao [1 ,2 ]
Cao, Sijun [3 ]
Ying, Tao [1 ,2 ]
Cao, Fuyong [4 ]
Wang, Jingya [1 ,2 ]
Zhu, Qingchun [1 ,2 ]
Zeng, Xiaoqin [1 ,2 ]
机构
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composite, Shanghai 200240, Peoples R China
[3] Aviat Ind Corp China, Aeronaut Radio Elect Res Inst, Shanghai 200241, Peoples R China
[4] Xiamen Univ, Coll Mat, Ctr Marine Mat Corros & Protect, Xiamen 361005, Peoples R China
来源
CORROSION COMMUNICATIONS | 2023年 / 11卷
基金
中国博士后科学基金;
关键词
Mg alloy; SKPFM; TEM; Yttrium; Corrosion product film; MAGNESIUM ALLOY; MICROSTRUCTURE; CALCIUM; ND; CA; PERFORMANCE; RESISTANCE; STABILITY; IMPEDANCE; OXIDES;
D O I
10.1016/j.corcom.2022.10.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Micro-alloying Mg alloys with rare earth elements is an economical and promising way to improve their corrosion resistance. It is of great importance to understand their corrosion behavior for designing corrosion-resistant Mg alloys. In this work, Mg-11Al-0.2Y alloy was prepared for exploring its corrosion behavior in 3.5 wt.% neutral NaCl solution. It exhibits a low corrosion current density of 2.3 mu A/cm2 2 after immersion for 1 d due to the formation of a protective surface film containing Al2O3, 2 O 3 , MgO and Mg(OH)2. 2 . However, nano-scaled pores exhibit at the film/matrix interface, which undermines integrity and protectiveness of the surface film after long-term exposure to chloride solution. (c) 2023 Published by Elsevier B.V. on behalf of Institute of Metal Research, Chinese Academy of Sciences. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )
引用
收藏
页码:12 / 22
页数:11
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