Reduced Graphene Oxide/Silica Nanocomposite-Reinforced Anticorrosive Fluorocarbon Coating

Reduced graphene oxide-silica (rGO/SiO2) nanocomposite filler was prepared with a ball milling process and then modified using a coupling agent of NH2C3H6Si(OC2H5)(3)(KH-550) to improve its dispersion in the fluoroethylene vinyl ether (FEVE) coating. The surface properties and morphologies of the modified rGO/SiO2(M-rGO/SiO2) nanocomposite filler and M-rGO/SiO2-reinforced FEVE coating were characterized by using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) and Tafel polarization curves were applied to illustrate the corrosion resistance of the coating. The results showed that the M-rGO/SiO(2)composite can disperse well in the coating and efficiently extend the corrosion path, enhancing the anti-corrosion property of the FEVE coating. Therefore, the |Z|(0.01 Hz)of M-rGO/SiO(2)reinforced FEVE coating maintained at around 10(10) omega center dot cm(2)in the 30 days test cycle and a protection efficiency of up to 95.18% was achieved.