Abstract

In this study, graphene was incorporated into a micro-arc oxidation coating to improve the wear and corrosion resistance of AZ31 alloy. For this purpose, the different concentration of graphene particles was used as 0 g/l, 0.5, 1, and 2 g/l. The wear tests were performed under loads of 2, 4, and 8 N. The composition and morphology of the coatings were investigated by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The coating thickness increased with increasing graphene concentration. To evaluate the corrosion performance of the coatings, potentiodynamic polarization, and electrochemical impedance spectroscopy tests were performed after immersed samples for 0.5, 16, and 32 h. The wear test results show that wear rates significantly decreases with increasing graphene concentration. Corrosion tests showed that polarization resistance increased and corrosion current density decreased for the coatings with the graphene addition compared to substrate material.

摘要

在这项研究中，石墨烯被掺入微弧氧化涂层中，以提高 AZ31 合金的耐磨性和耐腐蚀性。为此，石墨烯颗粒的不同浓度用作 0 g/l、0.5、1 和 2 g/l。磨损试验在 2、4 和 8 N 的载荷下进行。通过扫描电子显微镜、X 射线衍射和傅里叶变换红外光谱研究涂层的成分和形貌。涂层厚度随着石墨烯浓度的增加而增加。为了评估涂层的腐蚀性能，在将样品浸泡 0.5、16 和 32 小时后进行动电位极化和电化学阻抗谱测试。磨损测试结果表明，磨损率随着石墨烯浓度的增加而显着降低。