Evaluation of the anticorrosion potential of polymer nanocomposite coatings with reduced graphene oxide for the oil industry

This work aims to correlate the results obtained for epoxy nanocomposite coatings with reduced graphene oxide (rGO), indicating its possible anticorrosive behavior. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analyses were performed. Nanocomposite coatings were prepared with 0.1%wt, 0.3%wt and 0.5%wt of rGO. The SEM analyses for the applied coatings showed that there was a decrease in the number of defects on the surface of the samples with increasing rGO concentration up to 0.3%wt in the coatings. The anticorrosion behavior of some coatings was evaluated by electrochemical impedance spectroscopy (EIS), which showed that the addition of rGO in the polymer matrix improves the corrosion protection of the anticorrosion coating by increasing the diffusive path of corrosive agents. Furthermore, the high potential of the prepared nanocomposite coatings for improving corrosion resistance was noted. (author)