| 摘要 |
PURPOSE:To obtain a condenser having improved corrosion resistance for lessening the amount of Fe to be released in the hot well portion for atomic power plants by forming black iron oxide film having excellent corrosion resistance on the surface to be brought in contact with liquid of the main condenser. CONSTITUTION:A black iron oxide film 3 is provided on the inner surface of the hot well 2 of a condenser 1 by contacting the inner surface of the hot well 2 of the main condenser 1 made of a carbon steel or low-alloy steel with oxygen- containing steam (5-10kg/cm<2>) of 100 deg.C or higher, e.g., of 140-170 deg.C, for 100- 500hr, usually for 200-400hr. Since the portion other than the hot well 2 of the main condenser 1, e.g., the cooling tube 4, outer surface of a support plate 5, and inner surface of the body cylinder 6, is touched by usual high-temperature steam during the operation of unclear reactor, no pretreatment with steam is needed for the portion. |
