Modification and Morphology in Organic Coatings of Graphene

Metal corrosion, causing massive economic losses, is always important issue to be concerned by the government and industry field. One of the conventional anti-corrosion routes is physical separated the metal by spray coating the polymeric film. As an additive, the nano lamellar grapheme is able to enhance the barrier performance by blocking corrosive substances penetration despite the possible agglomeration tendency due to its poor miscibility to the polymer matrix. Furthermore, an inferior conductive pathway is possibly constructed between the external corrosive medium and the metal matrix caused by the conductivity of graphene, thus, shortening the graphene-modified organic coating film lifetime as well as acquiring an insufficient protection because of accelerating the matrix corrosion. Therefore, controlling graphene morphology, dispersion and orientation become the ley role to enhance the corrosion resistance of the coating, which was carefully reviewed, especially the graphene modified with organic molecules, polymers and inorganic nanoparticles to improve its dispersion, the graphene orientation in magnetic field, electric field or force field and self-assembly layer by layer to have a designed morphology. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.