Preparation of a β‐Cyclodextrin/Graphene Oxide@Quinoline Schiff Base Smart Coating and Its Microbial Corrosion Resistance

Abstract β‐cyclodextrin/Graphene oxide@ quinoline Schiff base (β‐CD/GO@QS), a material of resistant to microbial corrosion, was successfully prepared. Surface morphology, structure and thermal stability were performed using scanning electron microscopy (SEM), thermal gravimetric analysis (TGA) and Fourier‐transform infrared spectra (FT‐IR). The mechanical properties and microbial corrosion resistance of 0.5 wt% β‐CD/GO@QS smart coating in simulated seawater were investigated by electrochemical analysis. The results indicated that GO could improve the integrity of coating and had the great dispersion which decreased the effective anodic area to Q235 steel dissolution. Additionally, the smart coating of β‐CD/GO@QS effectively formed protective film on the exposed Q235 steel surface in the scratch area which could prevent the occurrence of electrochemical reactions, resulting in the cathode reaction hardly happened. Through the SEM and EDS image, the 0.5 wt% β‐CD/GO@QS coating of the scratched area was not seriously corroded after 14 d in simulated seawater.