▎ 摘　　要

NOVELTY - Preparation of graphene epoxy ceramic coating involves mixing the dispersing agent, wetting agent, defoaming agent, multifunctional amine additive, and deionized water, grinding, adding propylene glycol methyl ether and epoxy curing agent and dispersing the obtained mixture to obtain component (c1), adding epoxy resin and ethylene glycol diglycidyl ether to a reaction kettle, stirring, adding fiber (f1), stirring, adding mica powder to the mixed solution, stirring, and maintaining a vacuum to obtain component (c2), adding maleic anhydride modified hyperbranched polyamide curing agent, accelerating agent and silane coupling agent to the reaction kettle, stirring, adding fiber (f2) to the obtained mixed solution, stirring, adding mica powder to the obtained mixed solution, stirring, adding thickening agent to the mixed solution, stirring and maintaining a vacuum to obtain component (c3), and mixing components (c1), (c2), and (c3) and stirring at 1000-2000 rpm for 0.5-1 hour. USE - Preparation of graphene epoxy ceramic coating. ADVANTAGE - The method enables preparation of graphene epoxy ceramic coating with improved wear-resistance, anti-corrosion effect, and specific surface area. The two-dimensional film structure of graphene in the coating can form a barrier layer. The coating is capable of effectively preventing the corrosion of the substrate by the corrosive medium. DETAILED DESCRIPTION - Preparation of graphene epoxy ceramic coating involves (i) providing raw materials comprising a component (c1) containing 2-4 %mass dispersing agent, 0.2-0.3 %mass wetting agent, 0.2-0.3 %mass defoaming agent, 0.1-0.2 %mass multifunctional amine auxiliary agent, 65-68 %mass deionized water, 3-5 %mass graphene powder, 4-6 %mass propylene glycol methyl ether and 22-25 %mass water-based epoxy curing agent, a component (c2) containing 40-50 %mass epoxy resin, 5-10 mass% ethylene glycol diglycidyl ether, 15-20 mass% fiber (f1), 15-20 mass% mica powder and 2-10 %mass thickening agent and a component (c3) containing 37-50 %mass maleic anhydride modified hyperbranched polyamide curing agent, 2-8 %mass accelerating agent, 2-10 %mass silane coupling agent, 5-5 %mass fiber (f2), 10-20 %mass mica powder and 2-10 %mass thickening agent, (ii) mixing the dispersing agent, wetting agent, defoaming agent, multifunctional amine additive, and deionized water evenly, dispersing the mixture obtained at 1000-1500 rpm, gradually adding graphene powder during the dispersion process, grinding the obtained mixture after stirring and dispersing uniformly to a fineness of less than 60 mu m, sequentially adding propylene glycol methyl ether and water-based epoxy curing agent to the ground mixture and dispersing the obtained mixture at 800-1000 rpm to obtain component (c1), (iii) adding epoxy resin and ethylene glycol diglycidyl ether to a reaction kettle in sequence, maintaining a vacuum of 0.09-0.095 MPa at a certain temperature, stirring at a speed of 1200-2000 rpm for 1-2 hours, adding fiber (f1) to the obtained mixed solution, stirring for 15-30 minutes, maintaining the vacuum of 0.09-0.095 MPa, adding mica powder to the mixed solution, stirring for 15-30 minutes, maintaining a vacuum of 0.09-0.095 MPa, adding a thickening agent to the mixed solution, stirring for 10-20 minutes and maintaining a vacuum of 0.09-0.095 MPa to obtain component (c2), (iv) adding maleic anhydride modified hyperbranched polyamide curing agent, accelerating agent and silane coupling agent to the reaction kettle in sequence at a certain temperature, maintaining vacuum degree of 0.09-0.095 MPa, stirring at 1000-2000 rpm for 0.5-2 hours, adding fiber (f2) to the obtained mixed solution, stirring for 15-30 minutes, maintaining a vacuum of 0.09-0.095 MPa, adding mica powder to the obtained mixed solution, stirring for 15-30 minutes, maintaining a vacuum of 0.09-0.095 MPa, adding thickening agent to the mixed solution, stirring for 10-20 minutes and maintaining a vacuum of 0.09-0.095 MPa to obtain component (c3), and (v) mixing components (c1), (c2), and (c3) in a ratio of 4-3:1-2:1 by mixing the component (c1) with the component (c2), stirring at 1000-2000 rpm for 0.5-1 hour, adding the component (c3) and stirring at 1000-2000 rpm for 0.5-1 hour.