Heavy-duty anti-corrosion coating for low-treatment rusty surface and preparation method thereof

The invention discloses a low-treatment-rust-surface heavy anti-corrosion coating and a preparation method thereof, and relates to the technical field of metal material surface corrosion prevention. The scale-like metal zinc powder is composed of scale-like metal zinc powder, resin, a dispersing agent and a solvent, the D50 of the scale-like metal zinc powder ranges from 2 micrometers to 40 micrometers, and the thickness of the scale-like metal zinc powder is smaller than 0.2 micrometer; in a coating formed after the surface of a base body is coated, scaly metal zinc is evenly wrapped by resin, and a lamellar and alternately stacked organization structure is formed. According to the characteristics of the scaly metal powder, the scaly metal powder needs to be matched with a matched coating proportion, the process is optimized, the coating is of a laminar and alternately stacked organization structure, low-treatment rusty surface or non-rusty surface coating is carried out on the surface of a steel material, a