Long-acting anti-corrosion graphene modified solvent-free epoxy coating and preparation method thereof

The invention discloses a long-acting anti-corrosion graphene modified solvent-free epoxy coating and a preparation method thereof. The preparation method specifically comprises the steps of accordingto the formula proportion, adding polyurethane modified graphene nanoplatelets into solvent-free epoxy resin and stirring for 20-60 min at the temperature of 60-80 DEG C, and preparing matrix resin of the coating, then adding the wetting dispersant, the antirust pigment and the thickener into the matrix resin at one time in proportion, grinding by adopting a sand mill at normal temperature, controlling the rotating speed to be 1000-2500 r/min, and grinding for 2-5h, then adding the defoaming agent in batches in the grinding process, controlling the dosage not to exceed 5% of the total amountof the formula, grinding until the fineness reaches 50 mum or below, and filtering and packaging by adopting a filter screen to obtain a coating base material, and finally, stirring and curing the coating base material for 30-