| abstract |
The invention relates to a modified phenolic epoxy coating and a preparation method and application thereof, wherein the method comprises the following steps of 1, adding functionalized reduced graphene oxide into an organic solvent, and uniformly mixing to obtain a dispersion A; step 2, adding diphenol propane epoxy resin into the dispersion liquid A to be uniformly dispersed to obtain a dispersion liquid B; step 3, adding diphenol propane epoxy resin into the dispersion liquid B, uniformly mixing to obtain a dispersion liquid C, sequentially adding a dispersing auxiliary agent, novolac epoxy resin and pigment and filler into the dispersion liquid C, and uniformly mixing to obtain a coating a; step 4, grinding the coating a to enable the fineness of the coating a to be smaller than 15 micrometers, adding a coupling agent, an adhesion promoter, a defoaming agent and a leveling agent, and uniformly mixing to obtain a coating b; and 5, uniformly mixing the coating b and the alicyclic modified amine to obtain the modified phenolic epoxy coating. The oil pipe coated with the coating can be used for a long time under the working condition of 130 ℃ water injection, and has excellent corrosion resistance. |