Abstract
Graphene composite coating has been prepared by grafting 4-amino-3-(phenyldiazenyl) benzo[4,5]imidazo[1,2-a]pyrimidin-2(1H)-one (4-AIP-g-GO) on graphene oxide. The anticorrosive performance of 4-AIP-g-GO composite coating was measured using electrochemical studies in artificial sea water (ASW) and natural sea water (NSW). Results conclude that the inhibition efficiency (ƞ%) has significantly elevated in both the corrosive environment after coating on the copper surface. The 4-AIP-g-GO composite coating has been innovatively applied as an anti-corrosive coating owing to its restraining ability of the charge transfer and hydrophobicity at metal interface under aggressive saline conditions (ASW & NSW). The adsorption of coating material was confirmed by FE-SEM, XPS, Raman spectroscopy, FTIR, and UV–vis studies. The thermal stability of the coating material was ascertained by thermo-gravimetric analysis. This understanding of the 4-AIP-g-GO composite on Cu will help us to design anti-corrosion coatings in the future for industrial applications.
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