Microstructure evolution and corrosion resistance improvement of Mg-Gd-Y-Zn-Zr alloys via surface hydrogen treatment

被引：17
|
作者：
Wu, Luoyi [1 ]
Li, Yu'an [1 ]
Cheng, Yingliang [1 ]
Feng Linghu [1 ]
Jiang, Fulin [1 ]
Chen, Gang [1 ]
Teng, Jie [1 ]
Fu, Dingfa [1 ]
Zhang, Hui [1 ]
机构：
[1] Hunan Univ, Dept Mat Sci & Engn, Lushannan Rd, Changsha 410082, Hunan, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 191卷
基金：
中国国家自然科学基金;
关键词：
A; Magnesium; Alloy; Rare earth elements; B; Weight loss; EPMA; C; Hydrogen absorption; STACKING ORDERED PHASE; MECHANICAL-PROPERTIES; CONSTITUENT PHASES; DAMPING CAPACITY; HEAT-TREATMENT; BEHAVIOR; MORPHOLOGY; OXIDATION; CAST; 18R;
D O I：
10.1016/j.corsci.2021.109746
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A surface hydrogen treatment is proposed to improve the corrosion resistance of a long-period stacking ordered (LPSO) phase-enhanced Mg-Gd-Y-Zn-Zr alloy. After hydrogen treatment, the block-like LPSO phases are replaced by novel strip-shaped Gd0.5Y0.5H1.96 aggregates in the surface hydrogenated layer with 260 +/- 42 mu m thickness. The results of immersion tests in a 3.5 % NaCl solution show that hydrogen treatment improves the corrosion resistance of the alloy. As the LPSO phase decomposes, the Zn enriched in the LPSO phase dissolves into a magnesium matrix, which increases the Volta potential of the surface hydrogenated layer.
引用
收藏
页数：14
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