Study of factors accelerating corrosion of carbon steel by rotating-type corrosion test apparatus in gas/aqueous alternating environment

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.