Method and process of steel structure arc spraying composite corrosion proof coating system

Abstract

The invention provides a method and a process for spraying a composite anticorrosive coating system by electric arc for a steel structure, which belong to the method and the process for anticorrosion of the steel structure. In the anticorrosive coating system, first, rust removal and coarsing are carried out on the surface of the steel structure; then, an anode metal coating is sprayed by electric arc; then, a nanometer modified epoxy seal paint as a primer coating, an MIO epoxy paint or nanometer modified MIO epoxy paint as an intermediate paint coating, and a nanometer modified fluorine-containing polyurethane paint or fluorine-containing polysiloxane paint or siloxane modified acrylic polyurethane as a finishing coating are coated on the metal coating in sequence. The composite anticorrosive coating system has excellent performances of corrosion resistance, weather resistance, stain resistance, chemical product resistance, decoration and the like, and can obviously reduce or remit anticorrosive maintenance work and cost of the steel structure in late stage.