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

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

doi:10.1116/6.0002687

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

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^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

2 Citations (Scopus)

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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.

Published under an exclusive license by the AVS.

Original language	English
Article number	053101
Journal	Journal of Vacuum Science & Technology A
Volume	41
Issue number	5
Online published	10 Jul 2023
DOIs	https://doi.org/10.1116/6.0002687
Publication status	Published - Sept 2023

Funding

The work was supported by the National Natural Science Foundation of China (No. 51975530), Department of Education of Zhejiang Province (No. Y202249101), Heilongjiang Natural Science Foundation (No. LH2022E102), the City University of Hong Kong Strategic Research Grant (SRG No. 7005505), and the City University of Hong Kong Donation Research Grant (No. DON-RMG 9229021).

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in 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. Journal of Vacuum Science & Technology A 1 September 2023; 41 (5): 053101, and may be found at https://doi.org/10.1116/6.0002687.

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

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. Published under an exclusive license by the AVS.",

author = "Yinghe Ma and Jinhui Mei and Junxin Ouyang and Peng Wu and Sai Wang and Jianguo Yang and Yanming He and Wenjian Zheng and Huaxin Li and Chuanyang Lu and Sendong Ren and Jianping Xu and Chu, {Paul K.}",

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journal = "Journal of Vacuum Science & Technology A",

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TY - JOUR

T1 - Structure and corrosion resistance of electron-beam-strengthened and micro-arc oxidized coatings on magnesium alloy AZ31

AU - Ma, Yinghe

AU - Mei, Jinhui

AU - Ouyang, Junxin

AU - Wu, Peng

AU - Wang, Sai

AU - Yang, Jianguo

AU - He, Yanming

AU - Zheng, Wenjian

AU - Li, Huaxin

AU - Lu, Chuanyang

AU - Ren, Sendong

AU - Xu, Jianping

AU - Chu, Paul K.

PY - 2023/9

Y1 - 2023/9

N2 - 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. Published under an exclusive license by the AVS.

AB - 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. Published under an exclusive license by the AVS.

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85164976419&origin=recordpage

U2 - 10.1116/6.0002687

DO - 10.1116/6.0002687

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85164976419

SN - 0734-2101

VL - 41

JO - Journal of Vacuum Science & Technology A

JF - Journal of Vacuum Science & Technology A

IS - 5

M1 - 053101

ER -

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

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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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