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

被引：26

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.

引用

页数：9

共 49 条

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