The water-based intumescent fireproof and anticorrosion coatings for steel structure were prepared

in which the water-based silicone modified acrylic resin was used as the film forming material

and ammonium polyphosphate

melamine

pentaerythritol and expandable graphite were used as intumescent fireproof system

and aluminum tripolyphosphate

zinc phosphate

aluminum silver paste were used as anticorrosion system. The fire resistance of the coating was tested by high temperature simulation and thermal analysis method. The corrosion resistance of the coating was tested by salt spray test chamber and electrochemical workstation. The surface morphology and characterization of the coating were analyzed by SEM and X-ray diffraction. The results showed that when the mass fraction of resin was 50% and the mass ratio of fire prevention system to anti-corrosion system was 2.78

the coating had the best fire prevention and anti-corrosion performance

the expansion ratio of carbon layer was up to 7.9 and the fire resistance time is up to 65min. There was no obvious corrosion in the neutral salt spray test for 30 days

and the corrosion current was as low as 1.38

μ

A.