▎ 摘　　要

NOVELTY - Graphene modified aqueous novolac epoxy anticorrosive coating comprises component A and component B in a weight ratio of 3.5-6:1. The component A comprises 16-22 pts. wt. aqueous epoxy curing agent, 10-16 pts. wt. nano barium sulfate, 10-13 pts. wt. titanium pigment, 10-25 pts. wt. iron titanium powder, 5-8 pts. wt. aqueous zinc phosphate, 2- 6 pts. wt. grafted modified graphene oxide, 0.1-0.25 pts. wt. dispersant, 10.1-10.5 pts. wt. first antifoaming agent, 20.2-20.6 pts. wt. second antifoaming agent, 0.2-0.4 pts. wt. foam inhibitor, 1-4 pts. wt. cosolvent, 0.05-0.15 pts. wt. wetting agent, 0.1-0.3 pts. wt. neutralizing agent, 0.2-0.6 pts. wt. anti-flash rust agent, 30-45 pts. wt. deionized water. The component B is aqueous novolac epoxy resin emulsion. USE - Used as graphene modified aqueous novolac epoxy anticorrosive coating. ADVANTAGE - The method: carboxylates the surface of graphene oxide; provides more carboxy reaction sites for the reaction between the graphene oxide matrix and the matrix material; reactes the carboxylated graphene oxide with multiple carboxy reaction sites with polyetheramine under the action of silane coupling agent to produce grafted modified graphene oxide; endows anti-corrosion coatings with better hydrophobic properties; and increases the difficulty of corrosive substances contacting and corroding the material matrix. DETAILED DESCRIPTION - Graphene modified aqueous novolac epoxy anticorrosive coating comprises component A and component B in a weight ratio of 3.5-6:1. The component A comprises 16-22 pts. wt. aqueous epoxy curing agent, 10-16 pts. wt. nano barium sulfate, 10-13 pts. wt. titanium pigment, 10-25 pts. wt. iron titanium powder, 5-8 pts. wt. aqueous zinc phosphate, 2- 6 pts. wt. grafted modified graphene oxide, 0.1-0.25 pts. wt. dispersant, 10.1-10.5 pts. wt. first antifoaming agent, 20.2-20.6 pts. wt. second antifoaming agent, 0.2-0.4 pts. wt. foam inhibitor, 1-4 pts. wt. cosolvent, 0.05-0.15 pts. wt. wetting agent, 0.1-0.3 pts. wt. neutralizing agent, 0.2-0.6 pts. wt. anti-flash rust agent, 30-45 pts. wt. deionized water. The component B is aqueous novolac epoxy resin emulsion. The preparation of the graft-modified graphene oxide comprises (1) preparing graphene oxide by Hummers method, ultrasonically dispersing graphene oxide in dimethylformamide, adding sodium hydroxide and citric acid to continue ultrasonication, controlling the reaction temperature to be 60-85 degrees C for 2-3 hours under reflux conditions, filtering and washing the resulting product with suction and drying in oven to obtain carboxylated graphene oxide, and (2) adding the polyetheramine and the silane coupling agent to the methanol solvent separately, adding the carboxylated graphene oxide in the step (1) after the complete dissolution, controlling the reaction temperature to be 30-45 degrees C for 4-8 hours under reflux conditions, rotating the obtained product to remove the solvent, washing 2-4 times, and drying. An INDEPENDENT CLAIM is also included for preparing the coating, comprising (1) (a) adding deionized water to the reactor, adding the neutralizing agent, aqueous epoxy curing agent, first antifoaming agent, foam inhibitor, and anti-flash rust agent to the reactor, and stirring at 400-600 revolution per minute for 5-10 minutes, and (b) adding titanium dioxide, grafted modified graphene oxide, nano barium sulfate, aqueous zinc phosphate, wetting agent, iron titanium powder, dispersant, cosolvent in order, adding second antifoaming agent, stirring at 600-800 revolution per minute for 10-15 minutes, and passing through grinder a fineness of less than 20 mu m to obtain the component A, and (2) mixing component A and component B to obtain the product.