The present work is intended to enhance the anticorrosion performance of epoxy resin (EP) coating on mild steel (MS) by incorporating the functionalized graphene oxide as nanofiller material. In this context the graphene oxide (GO) was functionalized using 4- fluoro phenol and the functionalized graphene oxide (FGO) was well characterized by Fourier-transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectral studies. The thermal stability of FGO is ascertained by thermogravimetric analysis (TGA) and compared with that of GO. The anticorrosion behavior of epoxy (EP) and EP with different wt.% of FGO on MS samples in 3.5% NaCl solution was evaluated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The electrochemical data clearly showed that addition of 0.25 wt.% of FGO into EP drastically increases the corrosion resistance of the coating by 30.46% when compared to pure EP coating. Well dispersed composite coating effectively increases the barrier protection properties by blocking the pathway of the corrosive electrolyte to reach the metal-coating interface.

本工作旨在通过引入功能化的氧化石墨烯作为纳米填料材料来增强低碳钢（MS）上的环氧树脂（EP）涂层的防腐性能。在这种情况下，使用4-氟苯酚对氧化石墨烯（GO）进行了功能化，并通过傅立叶变换红外（FT-IR）光谱，粉末X射线衍射（XRD），扫描电子对功能化的氧化石墨烯（FGO）进行了很好的表征。显微镜（SEM），透射电子显微镜（TEM）和拉曼光谱研究。通过热重分析（TGA）确定了FGO的热稳定性，并将其与GO进行了比较。通过电化学阻抗谱（EIS）和电势极化技术评估了环氧树脂（EP）和具有不同重量百分比的FGO的EP在3.5％NaCl溶液中的MS样品上的防腐性能。电化学数据清楚地表明，与纯EP涂层相比，向EP中添加0.25 wt。％的FGO可以大大提高涂层的耐腐蚀性30.46％。分散良好的复合涂层可通过阻止腐蚀性电解质到达金属涂层界面的途径，有效地提高阻隔性能。