Micro-arc oxidation (MAO) is very effective to enhance the corrosion performance of Mg alloys. However, the micro-pores in MAO coatings provide a channel for the corrosion medium to reach the alloy matrix. In this work, electron beam strengthening (EBS) is performed to improve the microstructure of the Mg alloy and the MAO coating is prepared subsequently to improve the corrosion performance. The crystalline size of the Mg alloy decreases, the roughness improves, and the corrosion resistance increases. Furthermore, refinement of the grain size by EBS improves the discharge in MAO. The noticeable effect of EBS on the microstructure of the coating lies in the improvement of density, such as porosity reduction by 47.8%. The compactness of the coatings also increases significantly, subsequently improving the corrosion resistance. The corrosion mechanism is proposed.
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Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31
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September 2023
Research Article|
July 10 2023
Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31
Special Collection:
Functional Coatings
Yinghe Ma
;
Yinghe Ma
(Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Writing – original draft)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
3
Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong
, Tat Chee Avenue, Kowloon, Hong Kong 150006, China
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Jinhui Mei;
Jinhui Mei
(Data curation, Investigation, Resources)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Junxin Ouyang
;
Junxin Ouyang
(Data curation, Investigation, Resources)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Peng Wu;
Peng Wu
(Data curation, Resources)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Sai Wang
;
Sai Wang
(Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Jianguo Yang
;
Jianguo Yang
a)
(Funding acquisition, Supervision, Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Yanming He;
Yanming He
(Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Wenjian Zheng;
Wenjian Zheng
(Visualization, Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Huaxin Li;
Huaxin Li
(Visualization, Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Chuanyang Lu;
Chuanyang Lu
(Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Sendong Ren
;
Sendong Ren
(Writing – review & editing)
1
Institute of Process Equipment and Control Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
2
College of Mechanical Engineering, Zhejiang University of Technology
, Hangzhou 310014, China
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Jianping Xu
;
Jianping Xu
(Funding acquisition, Writing – review & editing)
4
Department of Materials and Chemical Engineering, Heilongjiang Institute of Technology
, Harbin 150050, China
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Paul K. Chu
Paul K. Chu
a)
(Funding acquisition, Supervision, Writing – review & editing)
3
Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong
, Tat Chee Avenue, Kowloon, Hong Kong 150006, China
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a)
Authors to whom correspondence should be addressed: yangjg@zjut.edu.cn and paul.chu@cityu.edu.hk
Note: This paper is a part of the 2023 Special Topic Collection on Functional Coatings.
J. Vac. Sci. Technol. A 41, 053101 (2023)
Article history
Received:
March 17 2023
Accepted:
June 05 2023
Citation
Yinghe Ma, Jinhui Mei, Junxin Ouyang, Peng Wu, Sai Wang, Jianguo Yang, Yanming He, Wenjian Zheng, Huaxin Li, Chuanyang Lu, Sendong Ren, Jianping Xu, Paul K. Chu; Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31. J. Vac. Sci. Technol. A 1 September 2023; 41 (5): 053101. https://doi.org/10.1116/6.0002687
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