Growth behavior of MgAl-layered double hydroxide films by conversion of anodic films on magnesium alloy AZ31 and their corrosion protection

被引：143
作者：
Zhang, Gen [1 ]
Wu, Liang [1 ,2 ]
Tang, Aitao [1 ,2 ]
Chen, Xiao-Bo [3 ]
Ma, Yanlong [4 ]
Long, Ying [1 ]
Peng, Peng [1 ]
Ding, Xingxing [1 ]
Pan, Huiling [1 ]
Pan, Fusheng [1 ,2 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] RMIT Univ, Sch Engn, Carlton, Vic 3053, Australia
[4] Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2018年 / 456卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Layered double hydroxide; Growth behavior; Anodizing; Corrosion resistance; Magnesium alloys; IN-SITU GROWTH; AL ALLOYS; RESISTANCE; FABRICATION; COATINGS; VOLTAGE; AA2024; LDHS;
D O I：
10.1016/j.apsusc.2018.06.085
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
MgAl-LDH films were produced through hydrothermally chemical conversion of pre-prepared anodic films on Mg alloy AZ31. The growth behavior and corrosion performance of the LDH films were investigated. Results reveal that morphology, chemical compositions and structure of LDH films vary greatly as a function of the conversion treatment conditions. Internal sources of Mg2+ and Al3+ cations for the formation of LDH films were ascribed to: (i) degradation of the anodic films; and (ii) dissolution of the AZ31 substrate. Moreover, the Stranski-Krastanov (SK) growth mode, two-dimensional layer growth (2D) to three-dimensional (3D) growth, was proposed to explain the transformation process.
引用
收藏
页码：419 / 429
页数：11
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