▎ 摘　　要

NOVELTY - Preparing graphitic carbon nitride-graphene/aqueous epoxy composite paint comprises e.g. (i) heating melamine at 500 degrees C for 4 hours in static air to obtain block graphitic carbon nitride, and heating to obtain obtaining graphitic carbon nitride nanosheet, (ii) adding 0.02 g graphitic carbon nitride nanosheet into 50 ml deionized water, ultrasonic vibrating with a numerical control ultrasonic cleaner for 20 minutes, then adding 0.05 g graphene, and ultrasonically dispersing to obtain graphitic carbon nitride intercalated graphene dispersion, and centrifuging the mixed solution to remove unreacted graphene and graphitic carbon nitride nanosheet to obtain graphitic carbon nitride-graphene dispersion, and (iii) mixing base material and graphitic carbon nitride-graphene dispersion solution, and stirring to form a uniform dispersion system, then transferring the uniform dispersion system into the spray gun, high-pressure spraying onto a rectangular steel sheet, and curing. USE - The method is useful for preparing graphitic carbon nitride-graphene/aqueous epoxy composite paint. ADVANTAGE - The method: blocks the corrosive medium from entering the substrate and thus enhancing the corrosion resistance of the aqueous epoxy paint. DETAILED DESCRIPTION - Preparing graphitic carbon nitride-graphene/aqueous epoxy composite paint comprises (i) heating melamine at 500 degrees C for 4 hours in static air to obtain block graphitic carbon nitride, where the heating rate is 2 degrees C/minutes, placing small amount of block graphitic carbon nitride in an open ceramic crucible, and heating at 500 degrees C for 2 hours with a heating rate of 5 degrees C/minutes to obtain obtaining graphitic carbon nitride nanosheet, (ii) adding 0.02 g graphitic carbon nitride nanosheet into 50 ml deionized water, ultrasonic vibrating with a numerical control ultrasonic cleaner for 20 minutes, then adding 0.05 g graphene, and reacting under ultrasonic vibration (600 W), continuing ultrasonically dispersing for 1 hours to obtain graphitic carbon nitride intercalated graphene dispersion, and centrifuging the mixed solution to remove unreacted graphene and graphitic carbon nitride nanosheet to obtain graphitic carbon nitride-graphene dispersion, and (iii) mixing base material and graphitic carbon nitride-graphene dispersion solution, and stirring to form a uniform dispersion system, then transferring the uniform dispersion system into the spray gun, high-pressure spraying onto a rectangular steel sheet that has been sandblasted on the surface, and curing at room temperature for 2 days to obtain final product. An INDEPENDENT CLAIM is also included for graphitic carbon nitride-graphene/aqueous epoxy composite paint prepared by above method.