In-situ layered double hydroxides on Mg-Ca alloy: Role of calcium in magnesium alloy

被引：18
|
作者：
Xia, Yu [1 ]
Wu, Liang [1 ,2 ]
Yao, Wen-hui [1 ,2 ]
Hao, Meng [1 ]
Chen, Jing [1 ]
Zhang, Cheng [3 ]
Wu, Tao [1 ]
Xie, Zhi-hui [4 ]
Song, Jiang-feng [1 ,2 ]
Jiang, Bin [1 ,2 ]
Ma, Yan-long [5 ]
Pan, Fu-sheng [1 ,2 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Yangtze Normal Univ, Sch Mat Sci & Engn, Key Lab Chongqing Inorgan Special Funct Mat, Chongqing 408100, Peoples R China
[4] China West Normal Univ, Coll Chem & Chem Engn, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Peoples R China
[5] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2021年 / 31卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Mg-Ca alloys; Mg-Al layered double hydroxides; corrosion resistance; in-situ growth; self-healing; PLASMA ELECTROLYTIC OXIDATION; ACTIVE CORROSION PROTECTION; COMPOSITE COATINGS; VITRO CORROSION; PEO COATINGS; MICROSTRUCTURE; RESISTANCE; BEHAVIOR; IMPLANT; FILM;
D O I：
10.1016/S1003-6326(21)65602-9
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Mg-Al layered double hydroxides (LDHs), produced on cast Mg-xCa (x=0.5, 0.8, 2.0, wt.%) alloys by an in-situ growth method, showed good corrosion resistance compared to the bare magnesium substrate. The influence mechanism of the second phase (Mg2Ca) on LDHs production was investigated. Increasing Ca content increased the amount of Mg2Ca, decreasing the grain size and the corrosion rate of the alloys. The increased amount of the second phase particles and the grain refinement promoted the growth of LDHs, and thus led to the decreasing of corrosion rate of the Mg-xCa alloys with LDHs. A higher Mg2Ca amount resulted in forming fluffy LDHs. Due to the dual effects of the second phase (Mg2Ca) for LDHs growth and microgalvanic corrosion, LDHs/Mg-0.8Ca showed the lowest corrosion rate.
引用
收藏
页码：1612 / 1627
页数：16
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