| 摘要 |
PURPOSE:To provide a titled compsn. which is coated on the surface of a steel prior to a heat treatment, etc. and accelerates formation of a dense chromium oxide film and improves resistance to oxidation by incorporating the oxide particles of a rare earth element and an effective amt. of a cellulosic org. binder therein. CONSTITUTION:A coating agent contg. oxide particles of a rare earth element and an effective amt. of cellulosic org. binder is applied preliminarily on the surface of a stainless steel as a compsn. for suppressing the abnormal oxidation of said steel in the stage of heating such as a heat treatment, hot working or the like. Then the oxide particles of the rare earth element remain on the steel surface after scattering of the binder, etc. by heating and the dense chromium oxide film is formed on the steel surface by the presence of said particles, by which the high temp. abnormal oxidation of the stainless steel is suppressed. Y is preferable as the above-mentioned rare earth element and the mixture composed of Y and La, Sm, Ce, etc. is also used. Nitrocellulose lacquer paint, etc. are adequately used as the cellulosic org. binder. |
