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

被引：19

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

页数：14

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