Reduced graphene oxide/silica nanocomposite-reinforced anticorrosive fluorocarbon coating

Reduced graphene oxide-silica (rGO/SiO 2 ) nanocomposite filler was prepared with a ball milling process and then modified using a coupling agent of NH 2 C 3 H 6 Si(OC 2 H 5 ) 3 (KH-550) to improve its dispersion in the fluoroethylene vinyl ether (FEVE) coating. The surface properties and morphologies of the modified rGO/SiO 2 (M-rGO/SiO 2 ) nanocomposite filler and M-rGO/SiO 2 -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 Ω·cm 2 in the 30 days test cycle and a protection efficiency of up to 95.18% was achieved.