The invention particularly relates to a preparation method of a
polyaniline /
graphene water-based
epoxy anticorrosive paint by blending a
polyaniline composite material and a water-based
epoxy resin, belonging to the technical field of anticorrosive paints. In order to solve the problems of lower
water resistance and lower
corrosion resistance of the
coating due to abundant hydrophilic groups in the water-based
epoxy resin paint which uses water as the
solvent, the invention provides a preparation method of a
polyaniline water-based epoxy resin anticorrosive paint. By using the characteristic of large specific area in the
graphene, a
polymerization-reduction process is utilized to prepare the large-specific-area high-
dispersity polyaniline /
graphene composite material, and the
composite material is blended with the water-based epoxy resin to prepare the anticorrosive
coating. The polyaniline / graphene composite material added into the water-based epoxy resin enhances the metallic
corrosion potential, quickly conducts electrons formed in the
corrosion process, and separates the
cathode and
anode reaction; a
metal passivation layer is formed on the matrix surface to decelerate the
metal corrosion; and the composite material with large specific area prolongs the seepage path of
oxygen and water molecules to the
carbon steel surface, and thus, has excellent barrier properties.