Graphene-based polymer nanocomposites as barrier coatings for corrosion protection

Owing to superior barrier properties, graphene-based two-dimensional nanostructures are widely used to protect metals from corrosion. Organic polymers possess good adhesion to metallic substrates and their nanocomposites with graphene integrate the barrier effect which augument the corrosion protection. Graphene nanostructures have been successesfully used to reinforce the polymers so as to improve the barrier protection against the corrodents. Different type of polymers including thermoplastic, thermosetting, and conducting polymers, reinforced with graphene to protect the metal surfaces exposed to different environments were discussed in this chapter. The covalent and noncovalent functionalization of graphene improves its stability and hence promotes its dispersion in polymer matrix. Furthermore, the development of graphene based multifunctional coatings with superhydrophobicity and self-cleaning property was reviewed in the current chapter.