New insights on the different corrosion mechanisms of Mg alloys with solute-enriched stacking faults or long period stacking ordered phase

被引：154
作者：
Xie, Jinshu [1 ]
Zhang, Jinghuai [1 ]
Zhang, Zhi [1 ]
Yang, Qiang [2 ]
Guan, Kai [3 ]
He, Yuying [1 ]
Wang, Ru [1 ]
Zhang, Hao [1 ]
Qiu, Xin [2 ]
Wu, Ruizhi [1 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China
[3] Univ Tokyo, Dept Mat Engn, Tokyo 1138656, Japan
来源：
CORROSION SCIENCE | 2022年 / 198卷
基金：
中国国家自然科学基金;
关键词：
Mg alloys; Stacking faults; LPSO structure; SKPFM; Corrosion; HIGH-STRENGTH; MAGNESIUM ALLOYS; MICROSTRUCTURE; POLYTYPES; BEHAVIOR;
D O I：
10.1016/j.corsci.2022.110163
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Formation of profuse I2-type solute-enriched stacking faults (SESFs) in fine grains and transformation of SESFs to 18R-long period stacking ordered (LPSO) phase are attained in Mg-Er-Zn-Zr alloys. It is first confirmed by scanning Kelvin probe force microscopy (SKPFM) that SESFs with nanostructure act as weak anodes and the 18RLPSO phase serves as cathode, which are verified by the theoretical calculated electronic work function and observation of scanning transmission electron microscope. Furthermore, the preferential corrosion of uniformly dispersed SESFs is demonstrated to be conducive to forming effective passivation film. It provides a new insight for developing high-strength and anti-corrosion Mg alloys.
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收藏
页数：19
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