Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kozai, Naofumi; Dojiri, Shigeru; Moriyama, Noboru
JAERI-M 90-208, 15 Pages, 1990/11
no abstracts in English
Tsukada, Takashi; Ueno, Fumiyoshi
no journal, ,
It is necessary to predict the corrosion behavior of steel materials used for primary containment vessel etc. toward a decommissioning of the reactors at Fukushima Daiichi Nuclear Power Plant. The Rotating corrosion test of carbon steel (SGV 480) specimen was conducted by alternating exposure in gas/aqueous environments, assuming the vicinity of the gas-liquid interface and inner surface of the vessel where cooling water is flowing down. As a result, an acceleration of corrosion due to the alternating exposure was observed, and it was considered that a major cause of the acceleration is due to a thin water film formed on the surface of specimen. In this presentation, the influence of rotating speed, oxygen concentration and test temperature on the corrosion behavior will be presented.
Otani, Kyohei; Tsukada, Takashi; Ueno, Fumiyoshi; Yamamoto, Masahiro
no journal, ,
It has been reported that the corrosion rate of carbon steel in air-solution alternating environment, however, the mechanism of the accelerated corrosion of carbon steel in the alternating environment has not been clarified. In the present study, the mechanism of accelerated corrosion of carbon steel in the alternating condition is investigated by the cross-sectional observation and analysis for rust layer formed on the steel after the corrosion tests. The observation and analysis showed that the multi-layered rust layer was formed on the steel in the alternating environment, and the multi-layer rust layer accelerated the cathodic reaction. This acceleration of the cathodic reaction is the reason why the corrosion rate of carbon steel was accelerated in air-solution alternating environment.
