Corrosion-resistant coating as well as preparation method and application thereof

The invention provides a corrosion-resistant coating and a preparation method and application thereof.The corrosion-resistant coating is suitable for the outer surface of a nylon layer of an aluminum-plastic composite film and comprises, by weight, 90-110 parts of fluorocarbon resin, 10-20 parts of an isocyanate curing agent, 1-4 parts of organic silicon micro powder and 20-40 parts of a diluent. The preparation method comprises the following steps: (1) adding the organic silicon micro powder and the isocyanate curing agent into the diluent, fully stirring, and uniformly dispersing to obtain a diluent A; and (2) adding fluorocarbon resin into the diluent A, and fully and uniformly stirring to obtain the corrosion-resistant coating. The corrosion-resistant coating is applied to the nylon outer surface layer of the aluminum-plastic composite film in a roller coating mode, drying is conducted, curing is conducted for 6-18 h at the room temperature, then curing is conducted for 6-24 h at the temperature of 50-60