ABSTRACT This work is aimed to synthesize novel structural epoxy nanocomposites containing graphene oxide (GO) and 3-(trimethoxysilyl) propyl methacrylate (TMSPMA) modified W2C. The coating resistance of EP-GO/TMSPMA-W2C was additionally noticed to be over 44.9% higher than that of pure matrix. The GO/TMSPMA-W2C was enriched in the degradation products, forming an excellent passive layer at the coating/steel interface. The newly designed EP-GO/TMSPMA-W2C nanocomposite coating had improved protection against corrosion and excellent hydrophobic characteristics (WCA: 159°). The incorporation of graphene oxide enveloped W2C in the epoxy matrix resulted in improved adhesion strength, tensile strength and hardness properties.