Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31-Reference-Cited by-同舟云学术

Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31

Published:2023-07-10 Issue:5 Volume:41 Page:
ISSN:0734-2101
Container-title:Journal of Vacuum Science & Technology A
language:en
Short-container-title:

Author:

Ma Yinghe¹²³^ORCID,Mei Jinhui¹²,Ouyang Junxin¹²^ORCID,Wu Peng¹²,Wang Sai¹²^ORCID,Yang Jianguo¹²^ORCID,He Yanming¹²,Zheng Wenjian¹²,Li Huaxin¹²,Lu Chuanyang¹²,Ren Sendong¹²^ORCID,Xu Jianping⁴^ORCID,Chu Paul K.³^ORCID

Affiliation:

1. Institute of Process Equipment and Control Engineering, Zhejiang University of Technology 1 , Hangzhou 310014, China

2. College of Mechanical Engineering, Zhejiang University of Technology 2 , Hangzhou 310014, China

3. Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong 3 , Tat Chee Avenue, Kowloon, Hong Kong 150006, China

4. Department of Materials and Chemical Engineering, Heilongjiang Institute of Technology 4 , Harbin 150050, China

Abstract

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.

Funder

National Natural Science Foundation of China

Department of Education of Zhejiang Province

Heilongjiang Provincial Science and Technology Department

City University of Hong Kong Strategic Research Grant

City University of Hong Kong Donation Research Grant

Publisher

American Vacuum Society

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

Link

https://pubs.aip.org/avs/jva/article-pdf/doi/10.1116/6.0002687/18040636/053101_1_6.0002687.pdf

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