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        Surface modification of mild steel before acrylic resin coating by hybrid ZnO/GO nanostructures to improve the corrosion protection

        Zahra Sharifalhoseini,Mohammad H. Entezari,Ali Davoodi,Mohsen Shahidi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-

        The synergistic effect of ZnO and GO nanostructures on the surface modification of mild steel before theacrylic resin coating was studied. Firstly, the steel surface was pretreated in the presence of ultrasonicirradiation, and then ZnO nanostructures were synthesized by the cyclic voltammetry technique. GOnanosheets prepared by the modified hummer’s method were deposited on ZnO-containing surfaces usingtheelectrophoreticdeposition(EPD)technique.GOcoatingswiththicknessesof2.84,4.47and9.42mmwereobtained by varying the EPD time, and the 4.47 mm was found as the optimum value for the fabrication ofhybrid ZnO/GO structures. All samples were then covered with a thin layer of acrylic resin (10 mm) by thespin coating technique. The results indicated that the sample with underneath of hybrid ZnO/GOnanostructures shows significant improvement in anti-corrosion performance. In other words, Rp isincreased from 150,000 V cm2 (in the rein coated sample) to 380,000 V cm2 (in the sample with hybridnanostructures). The resulting surface has the potential to use as protective and glossy black coatings. Theroleof underneathnature,surface roughness, and molecular interactionsbetweenoxygenfunctionalgroupsof ZnO, GO, resin, and the metal in the enhanced corrosion protection was illustrated.

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