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.

引用

页数：9

共 49 条

[31] Corrosion inhibition synergies on a model Al-Cu-Mg, sample studied by localized scanning electrochemical techniques [J].

Snihirova, Darya ;

Taryba, Maryna ;

Lamaka, Sviatlana V. ;

Montemor, M. Fatima .

CORROSION SCIENCE, 2016, 112 :408-417

[32] Corrosion mechanism and evaluation of anodized magnesium alloys [J].

Song, Guang-Ling ;

Shi, Zhiming .

CORROSION SCIENCE, 2014, 85 :126-140

[33] Recent advances in X-ray microtomography applied to materials [J].

Stock, S. R. .

INTERNATIONAL MATERIALS REVIEWS, 2008, 53 (03) :129-181

[34] Leveling of surface defects in thin films of pigmented coatings [J].

Toivakka, M ;

Kokko, A ;

Salminen, P ;

Urscheler, R ;

Bousfield, DW .

NORDIC PULP & PAPER RESEARCH JOURNAL, 2001, 16 (03) :246-250

[35] Initial stages of AZ91 Mg alloy micro-arc anodizing: Growth mechanisms and effect on the corrosion resistance [J].

Veys-Renaux, Delphine ;

Rocca, Emmanuel ;

Martin, Julien ;

Henrion, Gerard .

ELECTROCHIMICA ACTA, 2014, 124 :36-45

[36] Relationship between amorphous structure and corrosion behaviour in a Zr-Ni metallic glass [J].

Wang, D. P. ;

Wang, S. L. ;

Wang, J. Q. .

CORROSION SCIENCE, 2012, 59 :88-95

[37] Role of graphene defects in corrosion of graphene-coated Cu(111) surface [J].

Wlasny, I. ;

Dabrowski, P. ;

Rogala, M. ;

Kowalczyk, P. J. ;

Pasternak, I. ;

Strupinski, W. ;

Baranowski, J. M. ;

Klusek, Z. .

APPLIED PHYSICS LETTERS, 2013, 102 (11)

[38] Corrosion mechanism of graphene coating with different defect levels [J].

Wu, Yinghao ;

Zhu, Xinyu ;

Zhao, Wenjie ;

Wang, Yanjun ;

Wang, Chunting ;

Xue, Qunji .

JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 777 :135-144

[39] Electrochemical studies of AC/DC anodized Mg alloy in NaCl solution [J].

Xia, SJ ;

Yue, R ;

Rateick, RG ;

Birss, VI .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (03) :B179-B187

[40] Improving the corrosion resistance of Mg-4.0Zn-0.2Ca alloy by micro-arc oxidation [J].

Xia, Y. H. ;

Zhang, B. P. ;

Lu, C. X. ;

Geng, L. .

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, 2013, 33 (08) :5044-5050

← 1 2 3 4 5 →