▎ 摘　　要

NOVELTY - Anticorrosive coating of large-diameter high-temperature-resistant thermal steel pipes comprises base material and curing agent, where base materials include silicone epoxy resin, phenolic epoxy resin, graphene, coupling agent, zinc phosphate + aluminum phosphate, mica powder + talc + titanium dioxide, defoamer + dispersant + hydrophobic agent + rheological agent, where anticorrosive coating is 20-25 wt.% silicone epoxy resin, 20 wt.% phenolic epoxy resin, 5-10 wt.% graphene, 10 wt.% coupling agent, 8 wt.% zinc phosphate + aluminum phosphate, 21 wt.% mica powder + talc powder + titanium dioxide, 10 wt.% defoamer + dispersant + hydrophobic agent + rheological agent and 4 wt.% curing agent. USE - Used as anticorrosive coating of large-diameter high-temperature-resistant thermal steel pipes. ADVANTAGE - The coating has no defects, strong adhesion, test adhesion of coating by pull-open method less than or equal to 12 MPa, improves temperature resistance and adhesion of high temperature resistant anti-corrosion coated steel pipes, and is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for spraying anticorrosive paint using large-diameter high-temperature-resistant thermal steel pipe, comprising preheating base material and curing agent separately before spraying the steel pipe, fully mixing the base material and curing agent to obtain anti-corrosion coating, and removing rust grade Sa2.5 of steel pipe, depth of the anchor pattern is 40-70 mu m, removing all dust, debris and sand on the surface of the steel pipe, using high-pressure airless spray pump to spray anti-corrosion coating on the surface of the steel pipe, and keeping surface temperature of the steel pipe is kept above 10 degrees C during spraying, surface temperature is higher than dew point temperature by more than 3 degrees C, where relative humidity is less than or equal to 85%, pressure of the spray gun nozzle is 28-32 MPa, spray gun is 300-500 mm from the inner wall of the tube, spray speed is 4-6 m/minutes, controlling dry film thickness of 80-250 mu m, and performing curing treatment after spraying, controlling normal temperature curing or curing temperature at 40-70 degrees C.