Reduced graphene oxide/silica nanocomposite‐reinforced anticorrosive fluorocarbon coating
Beijie Zhong, Liming Shen, Xiaoyan Zhang, Chang Li, Ningzhong Bao
Abstract
Abstract 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.