Corrosion resistance and anti-soiling performance of micro-arc oxidation/graphene oxide/stearic acid superhydrophobic composite coating on magnesium alloys

Dong Wang; Chen Ma; Jinyu Liu; Weidong Li; Wei Shang; Ning Peng; Yuqing Wen

doi:10.1007/s12613-023-2596-7

Volume 30 Issue 6

Jun. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(6): 1128-1139

Dong Wang, Chen Ma, Jinyu Liu, Weidong Li, Wei Shang, Ning Peng, and Yuqing Wen, Corrosion resistance and anti-soiling performance of micro-arc oxidation/graphene oxide/stearic acid superhydrophobic composite coating on magnesium alloys, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1128-1139. https://doi.org/10.1007/s12613-023-2596-7

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Dong Wang, Chen Ma, Jinyu Liu, Weidong Li, Wei Shang, Ning Peng, and Yuqing Wen, Corrosion resistance and anti-soiling performance of micro-arc oxidation/graphene oxide/stearic acid superhydrophobic composite coating on magnesium alloys, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1128-1139. https://doi.org/10.1007/s12613-023-2596-7

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Research Article

Corrosion resistance and anti-soiling performance of micro-arc oxidation/graphene oxide/stearic acid superhydrophobic composite coating on magnesium alloys

+ Author Affiliations

Corresponding authors:
Wei Shang    E-mail: 2001018@glut.edu.cn

Ning Peng    E-mail: ncdxclpn@glut.edu.cn

Yuqing Wen    E-mail: 2006027@glut.edu.cn
Received: 23 May 2022; Revised: 1 January 2023; Accepted: 5 January 2023; Available online: 6 January 2023

Abstract

Abstract

Magnesium (Mg) alloys, the lightest metal construction material used in industry, play a vital role in future development. However, the poor corrosion resistance of Mg alloys in corrosion environments largely limits their potential wide applications. Therefore, a micro-arc oxidation/graphene oxide/stearic acid (MAO/GO/SA) superhydrophobic composite coating with superior corrosion resistance was fabricated on a Mg alloy AZ91D through micro-arc oxidation (MAO) technology, electrodeposition technique, and self-assembly technology. The composition and microstructure of the coating were characterized by scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy, and Raman spectroscopy. The effective protection of the MAO/GO/SA composite coating applied to a substrate was evaluated using potentiodynamic polarization, electrochemical impedance spectroscopy tests, and salt spray tests. The results showed that the MAO/GO/SA composite coating with a petal spherical structure had the best superhydrophobicity, and it attained a contact angle of 159.53° ± 2°. The MAO/GO/SA composite coating exhibited high resistance to corrosion, according to electrochemical and salt spray tests.
- magnesium alloy;
- composite coating;
- superhydrophobic;
- corrosion resistance;
- anti-soiling performance

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