Mg and its alloys are biodegradable and mechanically strong materials, which can be used for an orthopedic implant and device applications, but corrosion rate of these alloys is high. In this research, the nanocomposite coatings of chitosan (CS)/graphene oxide (GO) were fabricated to improve the corrosion resistance of the Mg–2 wt% Zn scaffold. The contents of the GO nanosheets and the pulse electrodeposition process parameters, including peak current density (CD) and duty cycle (DC), will also be investigated. The Mg–2 wt% Zn as a substrate of the scaffold was prepared using a powder metallurgy process. The influence of the porosity was studied on the microstructure fabricated scaffolds. The coating microstructures and morphologies were investigated by Raman spectroscopy, x-ray diffraction, thermogravimetric analysis, and SEM. The atomic force microscopy was performed to study the thickness of the nanocomposite coatings. The zeta potential measurement was conducted for the dispersion of the GO nanosheets in the CS matrix. The obtained results showed that the optimum conditions to fabricate a uniform CS/GO coating on the scaffolds were 2 wt% GO, CD = 20 mA cm⁻², and DC = 0.5. The pH, time and temperature for the fabrication of the coatings were conducted at 5, 20 min, and 37 C, respectively. Additionally, the potentiodynamic polarization measurement in simulated body fluid indicated that the CS/GO coatings could provide effective protection of the scaffolds against corrosion. Additionally, the optimum sample obtained from the aspect of the corrosion behavior demonstrated adequate biocompatibility with proper adhesion of mouse fibroblast cells (L929) on the CS–2 wt% GO coating.

镁及其合金是可生物降解和机械强度高的材料，可用于骨科植入物和器械应用，但这些合金的腐蚀速率很高。在这项研究中，制备了壳聚糖 (CS)/氧化石墨烯 (GO) 的纳米复合涂层，以提高 Mg-2 wt% Zn 支架的耐腐蚀性。还将研究 GO 纳米片的含量和脉冲电沉积工艺参数，包括峰值电流密度 (CD) 和占空比 (DC)。使用粉末冶金工艺制备作为支架基底的 Mg–2 wt% Zn。研究了孔隙率对微结构制造的支架的影响。通过拉曼光谱、X 射线衍射、热重分析和 SEM 研究了涂层的微观结构和形貌。进行原子力显微镜以研究纳米复合涂层的厚度。对 GO 纳米片在 CS 基质中的分散进行 zeta 电位测量。结果表明，在支架上制备均匀的 CS/GO 涂层的最佳条件是 2 wt% GO，CD = 20 mA cm^-2和 DC = 0.5。用于制造涂层的 pH 值、时间和温度分别在 5、20 分钟和 37 摄氏度下进行。此外，模拟体液中的动电位极化测量表明，CS/GO 涂层可以有效保护支架免受腐蚀。此外，从腐蚀行为方面获得的最佳样品证明了足够的生物相容性，小鼠成纤维细胞 (L929) 在 CS-2 wt% GO 涂层上具有适当的粘附性。