镁合金表面微弧氧化/氧化石墨烯/硬脂酸超疏水复合涂层的耐蚀和抗污性能研究

王东; 马宸; 刘金玉; 李伟东; 尚伟; 彭宁; 温玉清

doi:10.1007/s12613-023-2596-7

Volume 30 Issue 6

Jun. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 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

Cite this article as:

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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研究论文

镁合金表面微弧氧化/氧化石墨烯/硬脂酸超疏水复合涂层的耐蚀和抗污性能研究

桂林理工大学化学与生物工程学院, 电磁化学功能物质广西区重点实验室, 桂林541004, 中国

通讯作者:
尚伟    E-mail: 2001018@glut.edu.cn

彭宁    E-mail: ncdxclpn@glut.edu.cn

温玉清    E-mail: 2006027@glut.edu.cn

文章亮点

(1) 在镁合金AZ91D上合成了具有花瓣状球形结构的MAO/GO/SA超疏水复合涂层。

(2) MAO/GO/SA复合涂层表现出优异的超疏水性能、疏水稳定性和自清洁性能。

(3) 与镁合金基体相比，MAO/GO/SA复合涂层的腐蚀电流密度减少了三个数量级，同时阻抗也增加了三个数量级，耐盐雾腐蚀时间达192 h。

中文摘要

镁合金因其低密度、高强度重量比和尺寸稳定性等优点，在汽车、医疗和电子通信领域具有很高的应用价值和广泛的应用前景。然而，镁合金在腐蚀环境中较差的耐腐蚀性在很大程度上限制了其广泛应用。因此，本文旨在通过微弧氧化技术、电沉积技术和自组装技术相结合，在镁合金AZ91D上制备一种具有优异耐腐蚀性的微弧氧化/氧化石墨烯/硬脂酸（MAO/GO/SA）超疏水复合涂层。通过扫描电子显微镜、X射线衍射、能量色散光谱和拉曼光谱对涂层的组成和微结构进行了表征。利用极化曲线、电化学阻抗谱和盐雾实验，评估了MAO/GO/SA复合涂层的防腐蚀性能。研究结果表明，所制备的超疏水复合涂层具有花瓣状球形结构，其接触角达到了159.53° ± 2°，具有优越的超疏水性和抗污性能。而且，MAO/GO/SA复合涂层也表现出较好的耐腐蚀性能，其腐蚀电流密度比镁合金基体低三个数量级，阻抗大三个数量级，耐盐雾腐蚀时间达192 h。

关键词:

Research Article

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

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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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