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Graphene oxide (GO) is known as a nonstoichiometric chemical compound of oxygen-functionalized derivatives, monolayer carbon atoms with oxygen-containing functional moieties. GO consists of a hexagonal carbon network with hydroxyl and epoxide functional group on its basal plane, and carbonyl and carboxyl groups on its edges. This chapter describes the structure, properties, and synthesis of GO and applications of GO especially in the field of corrosion protection. GO films in monolithic or multilayer GO or GO composite coatings have been applied to protect metallic substrates from the degradation. It seems that GO could be served in the coatings to possess as corrosion-resistant system. The great potential of GO is an effective barrier to diffusion of corrosive species, i.e., H2O, O2, and chloride ion or physical traps for water diffusion in the coating. The barrier properties of the GO come from its impermeability to oxygen and water and its very high surface area that may lead to lower porosity in the coating. Besides, it could functionalize with organic groups or act as a nanocarrier to adsorb inhibitors to enhance corrosion resistance of coatings. |
