The aim of this study was to produce graphene oxide (GO) coatings on biodegradable AZ31B magnesium (Mg) alloy. GO was synthesized by improved Hummers’ method, and a suspension was prepared in deionized water by ultrasonication. GO coatings were developed on AZ31B Mg alloy by electrophoretic deposition (EPD). The EPD parameters, such as voltage and time, were optimized to obtain uniform GO coatings. Characterization was carried out using Fourier transform infrared spectroscopy, X-ray diffraction, atomic force microscopy (AFM), and scanning electron microscopy. GO was found to have a thickness of approximately 0.7–1 nm as determined by AFM. Electrochemical behavior of coatings was evaluated by Tafel analysis and electrochemical impedance spectroscopy (EIS) in Ringer’s lactate solution. GO coatings improved the corrosion resistance of the AZ31B Mg alloy by 16× in Ringer’s lactate solution as compared to bare Mg alloy.

这项研究的目的是在可生物降解的AZ31B镁（Mg）合金上生产氧化石墨烯（GO）涂层。用改进的Hummers法合成GO，并通过超声在去离子水中制备悬浮液。通过电泳沉积（EPD）在AZ31B镁合金上开发了GO涂层。对EPD参数（例如电压和时间）进行了优化，以获得均匀的GO涂层。使用傅里叶变换红外光谱，X射线衍射，原子力显微镜（AFM）和扫描电子显微镜进行表征。通过原子力显微镜测定，发现GO的厚度约为0.7-1 nm。通过Tafel分析和林格氏乳酸溶液中的电化学阻抗谱（EIS）评估了涂层的电化学行为。