Preparation method of high temperature resistant anticorrosive coating

The invention provides a preparation method of a high temperature resistant anticorrosive coating. The pretreatment of a coating substrate metalwork and the selective control the reaction temperature in the preparation process make the adhesion of the prepared high temperature resistant anticorrosive coating to the above substrate enhanced. Raw materials of the coating comprise 70-92wt% and preferably 80-90wt% of a liquid phenolic resin and 8-30wt% of an additive, wherein the content of a phenolic resin in the liquid phenolic resin is 40-60wt%, and the phenolic carbon yield is 40-65wt%. The additive can be selected from one of more of carbon black powder, carbon fibers, diatomite and white carbon black. It is especially suitable for use the coating prepared through the method in 600-850DEG C rare earth smelting chlorination furnaces.