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镁合金上微弧氧化/氧化石墨烯复合涂层的耐腐蚀性

Corrosion Resistance of Micro-Arc Oxidation/Graphene Oxide Composite Coatings on Magnesium Alloys.

作者信息

Shang Wei, Wu Fang, Wang Yuanyuan, Rabiei Baboukani Amin, Wen Yuqing, Jiang Jiqiong

机构信息

Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.

Department of Mechanical and Materials Engineering, College of Engineering and Computing, Florida International University, Miami 33174, United States.

出版信息

ACS Omega. 2020 Mar 27;5(13):7262-7270. doi: 10.1021/acsomega.9b04060. eCollection 2020 Apr 7.

DOI:10.1021/acsomega.9b04060
PMID:32280867
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7143415/
Abstract

The micro-arc oxidation/graphene oxide (MAO/GO) composite coatings were successfully prepared on the surface of magnesium alloys by the MAO and electrodeposition technologies. The morphology and composition of the MAO/GO composite coatings were characterized by scanning electron microscopy, energy-dispersive spectrometry, X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis spectroscopy, Raman spectroscopy, roughness test, and binding test. The electrochemical impedance spectroscopy, polarization curve, and immersion test were used to evaluate the protection performance of MAO/GO composite coatings provided to a substrate. The test results showed that GO covered the surface of the MAO film and had a multilayer structure in the composite coatings. The composite coatings performed the function of sealing the micropores of the MAO film. The elements in the surface of the composite coatings were evenly distributed and the C element content was high. We find that the composite coatings were smoother than the MAO film. The bonding force of the composite coating needs to be enhanced. The corrosion resistance of the MAO/GO composite coatings was obviously better than that of a single MAO film.

摘要

通过微弧氧化（MAO）和电沉积技术，成功在镁合金表面制备了微弧氧化/氧化石墨烯（MAO/GO）复合涂层。采用扫描电子显微镜、能谱仪、X射线衍射、X射线光电子能谱、紫外可见光谱、拉曼光谱、粗糙度测试和结合力测试对MAO/GO复合涂层的形貌和成分进行了表征。利用电化学阻抗谱、极化曲线和浸泡试验评估了MAO/GO复合涂层对基体的保护性能。测试结果表明，GO覆盖在MAO膜表面，在复合涂层中具有多层结构。复合涂层起到了密封MAO膜微孔的作用。复合涂层表面元素分布均匀，C元素含量较高。我们发现复合涂层比MAO膜更光滑。复合涂层的结合力有待增强。MAO/GO复合涂层的耐蚀性明显优于单一的MAO膜。

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