The invention discloses a water-based heavy anti-
corrosion coating for
coating a rusty residual paint film. The
coating comprises an ionic water-based modified
alkyd emulsion, deionized water, an anti-
rust pigment, a filler, an anti-flash
rust agent, a salt spray resistant auxiliary agent, a self-repairing auxiliary agent, a penetrant, a
corrosion inhibitor, a thixotropic agent and an auxiliary agent. The anti-
rust pigment, the filler, the flash-rust inhibitor and the salt-spray-resistant auxiliary agent interact with each other to act on the surface of steel and residual rust on the surface of the steel, so that a stable chelate
passivation layer and a complex are generated, and rust coating is realized; the nano
conductive polymer can induce the
oxide film to be gradually repaired, so that the anti-
corrosion layer has a self-repairing function; the
corrosion inhibitor and the penetrant can make the coating permeate into a rust layer, a residual paint film and the surface of steel, redundant rust is changed into filler in the coating, coating with the rust and the residual paint film is achieved, and the penetrant can also replace ionic and atomic harmful substances adsorbed by defects on the surface of the steel into the coating. And the coating does not crack or peel off due to
desorption of ionic and atomic harmful substances under a high-temperature condition.