3-D distribution characteristics of the micro-defects in the PEO coating on ZM6 mg-alloy during corrosion

被引：28
作者：
Chen, Zhenning [1 ]
Ji, Haotian [1 ]
Geng, Xiaoqian [1 ]
Chen, Xiaochun [1 ]
Yong, Xingyue [1 ]
Zhang, Suode [2 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[2] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
CORROSION SCIENCE | 2020年 / 174卷
基金：
中国国家自然科学基金;
关键词：
Magnesium; XRD; SEM; Oxide coatings; PLASMA ELECTROLYTIC OXIDATION; PURE MAGNESIUM; RESISTANCE; MECHANISM; BEHAVIOR; POROSITY; SURFACE; FILMS; ANTICORROSION; SULFATE;
D O I：
10.1016/j.corsci.2020.108821
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The 3-D distributions of the micro-defects in the PEO coating on ZM6 Mg-alloy were investigated using X-ray tomography (XRT) and confocal laser scanning microscopy (CLSM) in conjunction with scanning electron microscopy (SEM). The results showed that micro-defects with different sizes and shapes existed in the pristine PEO coating. The sizes, shapes, and numbers of micro-defects of the PEO coating in 3.5 % NaCl solution changed greatly with immersion time under the synergistic effects between corrosion and the extension of corrosion products. Finally, the through-defects were formed by connecting the adjacent micro-defects and the substrate corroded.
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页数：9
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