期刊
APPLIED SURFACE SCIENCE
卷 456, 期 -, 页码 419-429出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.06.085
关键词
Layered double hydroxide; Growth behavior; Anodizing; Corrosion resistance; Magnesium alloys
类别
资金
- National Key Research and Development Program of China [2016YFB0301100]
- National Natural Science Foundation of China [51701029, 51531002, 51474043]
- China postdoctoral Science Foundation [2018T110943, 2017M620410]
- Chongqing postdoctoral Scientific Research Foundation [Xm2017010]
- Chongqing Research Program of Basic Research and Frontier Technology [cstc2016jcyjA0388, cstc2017jcyjBX0040]
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.
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