Effect of selective oxidation on corrosion behavior of Mg-Gd-Y-Zn-Zr alloy

被引:35
作者
Wu, Luoyi [1 ,2 ]
Li, Haotian [1 ]
机构
[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Hunan Prov Key Lab Spray Deposit Technol & Applic, Changsha 410082, Hunan, Peoples R China
关键词
Magnesium; Alloy; Rare earth elements; EPMA; Selective oxidation; Pitting corrosion; STACKING ORDERED PHASE; MECHANICAL-PROPERTIES; MAGNESIUM; MICROSTRUCTURE; DISSOLUTION; RESISTANCE; EVOLUTION; PHOSPHATE; CHLORIDE; CAST;
D O I
10.1016/j.corsci.2018.07.026
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The multilayer features are observed in the microstructures of Mg-Gd-Y-Zn-Zr alloy after high-heat treatment. The microstructures of the heat-treated samples in depth can be divided into four zones: the rare earth (RE) oxide film, the layer without long-period stacking ordered (LPSO) phases, the lamellar LPSO layer and the blocky LPSO zone. The corrosion behavior of peak-aged samples was investigated. The results indicate that the RE-rich scale and the LPSO-free layer, which are generated as the result of selective oxidation during high-heat treatment, significantly improve the corrosion resistance of Mg-Gd-Y-Zn-Zr alloy.
引用
收藏
页码:238 / 248
页数:11
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