| 摘要 |
PURPOSE:To form the film which effectively exhibits an oxidation preventive effect in a wide temp. range with a simple stage on the surface of a carbon- contg. molding by subjecting a coating material which is previously applied on the surface of the carbon-contg. molding to high-frequency induction heating, thereby melting the material. CONSTITUTION:An induced current is generated on the surface of the carbon- contg. molding 1 facing a coil 2 by impressing a high-frequency current to the coil 2. The coating material 20 is melted by the Joule heat generated by this induced current and is stuck to the surface of the carbon-contg. molding 1, by which the oxidation preventive film 30 is formed. The m.p. of the above- mentioned coating material is preferably 800 to 2,000 deg.C. The material has the possibility of flowing down during use if the m.p. is below 800 deg.C. The coating material is not melted by the above-mentioned Joule heat and the oxidation preventive film is not formed at the high m.p. exceeding 2,000 deg.C. |
