Evaluation of the Performance of Graphene oxide / N-NDiethylhydroxylamine Nanocoating Hybrid in Reducing the Cathodic Disbandment and Increasing the Corrosion Resistance of Zinc-Rich Epoxy Coatings on Steel Substrates

In this research, the effect of the organic substance N-N-diethylhydroxylamine (DEHA) along with multi layered graphene oxide (MLGO) in zinc-rich coating as a corrosion inhibitor on reducing the cathodic disbonding and increasing the corrosion resistance of steel substrates was investigated. For this purpose, paints with different weight percentages of DEHA and MLGO were made and applied on metal substrates. In order to investigate the adsorption of DEHA inhibitor on MLGO nanosheets and create interaction with it, the combination of N-Ndiethylhydroxylamine in a ratio of 2:1 with MLGO was investigated using FT-IR, TGA and SEM-EDX analysis. The inhibitory effect of DEHA in the coating was investigated by salt fog test and pull-off adhesion and cathodic disbondment and electrochemical impedance analysis. The results showed that by increasing the weight percentage of DHEA inhibitor compared to MLGO from 0.5 to 2% in the coating structure, the amount of cathodic disbonding decreased and the corrosion resistance increased significantly.