Self-cleaning corrosion-resistant coating, preparation method thereof and self-cleaning corrosion-resistant metal plate

The invention relates to a self-cleaning corrosion-resistant coating. The self-cleaning corrosion-resistant coating is prepared from the following components in percentage by mass: 70 to 80 percent of PVDF (Polyvinylidene Fluoride) fluorocarbon resin, 5 to 15 percent of pigment, 1 to 2 percent of flatting agent, 10 to 20 percent of diluent and 1 to 5 percent of modified silicon dioxide. The preparation method comprises the following steps: ultrasonically dispersing 1-3 parts of silicon dioxide into 7-9 parts of ethylene glycol to obtain dispersion liquid; uniformly mixing 0.5%-1.5% of a coupling agent and 98.5%-99.5% of the dispersion liquid, standing for 4-8 hours at the temperature of 110-120 DEG C, filtering to obtain particles, and drying the particles for 0.5-1.5 hours at the temperature of 30-50 DEG C to obtain modified silicon dioxide; the preparation method comprises the following steps: mixing PVDF fluorocarbon resin, a pigment, a leveling agent and a diluent, and stirring for 4-6 minutes to obtain a