Preparation of graphene oxide-based waterborne anti-corrosion coatings

Abstract Metal equipment is prone to corrosion due to sudden changes in temperature and abundant precipitation in Northeast China. The anti-corrosion ability of the coating can be improved by doping graphene oxide (GO) into waterborne acrylic resin (AP); however, GO has problems of poor dispersion and easy aggregation. In this study, Hexamethylene diisocyanate (Tri-HDI) was used to improve the dispersibility of GO. The layer spacing of GO was expanded through the grafting and modification of its functional groups with p-phenylenediamine and polyvinylpyrrolidone (PVP), and its strength was improved by introducing the -Si group, thereby obtaining reinforced-dispersion graphene oxide (Reinforced Dispersion Graphene Oxide, RDGO). Finally, RDGO and AP were combined by the wet transfer method to prepare a new type of water-based anti-corrosion coating.