▎ 摘　　要

NOVELTY - Preparing fertilizer storage tank inner wall corrosion-resistant coating involves: (1) adding N-methylimidazole and maleic acid to n-bromobutane, heating, heat-preserving and stirring, washing, and vacuum drying to get a composite material, mixing with a sodium oleate solution, stirring, and performing rotary evaporation to obtain a modified reinforcing material; (2) evenly dispersing graphene and nano-bentonite in N-methylpyrrolidone to obtain a dispersion, adding the modified reinforcing material, heat-preserving and stirring, ultrasonically treating, centrifuging, leaving still, suction filtering, washing, and vacuum drying to obtain a corrosion-resistant reinforcing agent; (3) adding acrylic emulsion, defoamer and dispersant to a mixer, mixing, then adding the corrosion-resistant reinforcing agent, and continuously stirring to obtain a corrosion-resistant coating; and (4) spraying the coating on the inner wall of the fertilizer tank, then drying, and curing. USE - The method is useful for preparing fertilizer storage tank inner wall corrosion-resistant coating used for fertilizing machine. ADVANTAGE - The method improves the corrosion resistance of the coating by introducing the corrosion-resistant reinforcing agent into the coating system. DETAILED DESCRIPTION - Preparing fertilizer storage tank inner wall corrosion-resistant coating involves: (1) adding N-methylimidazole and maleic acid to n-bromobutane, heating at 72-78 degrees C, heat-preserving and stirring for 5-7 hours, washing 3 times with ethyl acetate, and vacuum drying at 55 degrees C for 5 hours to get a composite material, mixing with a sodium oleate solution, stirring for 10-12 hours, and performing rotary evaporation to dry to constant weight to obtain a modified reinforcing material; (2) evenly dispersing graphene and nano-bentonite in N-methylpyrrolidone to obtain a dispersion, adding the modified reinforcing material to the dispersion, adjusting the temperature to 50-55 degrees C, heat-preserving and stirring for 30-35 minutes, adjusting the temperature to 65-70 degrees C, ultrasonically treating for 8-10 hours, centrifuging for 40 minutes, leaving still for 2 hours, suction filtering, washing, and vacuum drying to constant weight to obtain a corrosion-resistant reinforcing agent; (3) adding acrylic emulsion, defoamer and dispersant to a mixer, mixing at 500 rpm for 30 minutes, then adding the corrosion-resistant reinforcing agent, and continuously stirring for 1 hour to obtain a corrosion-resistant coating; and (4) uniformly spraying the coating on the inner wall of the fertilizer tank, then drying and curing at a constant temperature.