| 摘要 |
PURPOSE:To increase the resistances to heat, acid and corrosion and improve heat exchanging properties by a method wherein a coating, in which a binder is combined with graphite together with a dispersing agent, is coated on the surface of the heat exchanger or the like and the coating is calcined at a temperature higher than the heat curing temperature of the binder. CONSTITUTION:The coating, in which the binder consisting of alkaline metal silicate is combined with the powdered and/or fibrous graphite together with the dispersing agent, is coated on the surface of the heat exchanger 1 by dipping method and is calcined at a temperature 50 deg.C higher than the heat curing temperature of the binder. The layer of coating, formed on the surface of the heat exchanger by such method, is prominent in the resistances to heat, acid, oxidization and corrosion while the heat exchanging properties may be improved by adding the graphite. Further, the durability of the heat exchanger 1 may be improved remarkably by the method wherein the coating is calcined at a temperature higher than the heat curing temperature of the binder to disperse the adder and the dispersing agent and stabilize the film of the coating. |
