Corrosion-resistant water-based paint and preparation method and application thereof

The invention relates to a corrosion-resistant water-based paint and a preparation method thereof. The corrosion-resistant water-based paint is composed of the following components in percentage by mass: 30-50% of water-based resin, 5-10% of a corrosion inhibitor, 5-10% of a corrosion inhibitor carrier, 1-5% of an assistant, 5-10% of pigment and 25-45% of water. The preparation method comprises the following steps: sequentially adding chlorinated polyolefin, cyclohexanone, cyclohexanone peroxide, maleic anhydride and zinc caprylate into a reaction container, and keeping the materials at a temperature of 70-90 DEG C for 3-7 h; adding a diamine compound, and keeping the materials at a temperature of 60-80 DEG C for 2-5 h; adding gallic acid and keeping the materials at a temperature of 70-80DEG C 3-7 h to obtain the corrosion inhibitor; sequentially weighing the obtained corrosion inhibitor and other raw materials, adding the weighed corrosion inhibitor and other raw materials into thereaction container, perfor