▎ 摘　　要

The corrosion behavior of a titanium-based electrode with an electrocatalytic coating of TiO2-RuO2 modified by graphene oxide (GO)/reduced graphene oxide (rGO) nanosheets synthesized via a sol-gel method, has been investigated. For this purpose, the central composite design method (CCD) and surface response methodology (RSM) were used to simulate and optimize the graphene compounds additives and the layers of the coating on the linear polarization resistance (LPR) of a dimensionally stable anode (DSA). Also, significant parameters and their interactions were investigated. In order to characterize the synthesized coatings, XRD, FE-SEM, TEM, AFM, potentiodynamic polarization, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) curves were used. The optimal conditions includes the GO concentration of 1.0 mg ml(-1), rGO concentration of 0.55 mg ml (-1) and the layers of 4, demonstrated the optimal predicted LPR equal to 682.55 k Omega cm(-2) and the mean value for the synthesized optimal electrode equal to 694.27 k Omega cm(-2), which indicated that the model was suitable and reliable for analyzing the effect of the input parameters on the corrosion resistance of the anodes. The contribution of graphene into the coatings composition increases the corrosion resistance due to the layered structure of nanosheets. On the other hand, by distraction, the penetration of electrolyte to the substrate through the pores, the formation of the middle layer of TiO(2 )is prevented, which is the main cause of the deactivation of DSAs.