Influence of graphene on the anti-corrosion performance of epoxy-based coatings

In this work,graphene-modified epoxy-based anti-corrosion coatings were prepared and the influence of graphene on the anti-corrosion performance of the epoxy-based coatings was investigated with water contact angle test,chemical solution immersion test,and electrochemical test.The water contact angle and chemical solution resistance of the epoxy-based coatings were improved with an increase in graphene content from 0 to 0.4%.These results prove that addition of graphene can significantly improve the hydrophobicity and impermeability of epoxybased coatings.However,when the graphene content was increased to 0.5%,the performance of the epoxy-based coatings decreased because of graphene aggregation.Tafel polarization results showthat graphene addition can significantly reduce the corrosion current density and corrosion potential of epoxy-based coatings,which enhance their anti-corrosion performance.