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Journal Articles

Effect of zeolites on the corrosion potential of type 316L stainless steel in diluted artificial sea water under gamma-ray irradiation

Kato, Chiaki; Sato, Tomonori; Ueno, Fumiyoshi; Yamagishi, Isao; Yamamoto, Masahiro

Zairyo To Kankyo 2015 Koenshu (CD-ROM), p.83 - 86, 2015/05

In relation to the consideration for long-term storage of spent Cs adsorption vessels containing zeolites in the Fukushima Daiichi Nuclear Power Station, corrosion of the vessel material in the spent Cs adsorption vessel is one of important issues. We performed electrochemical tests of stainless steel (SUS 316L) in the zeolites containing artificial seawater under gamma-ray irradiation. The spontaneous potential (ESP) and critical pitting potential (VC), of SUS316L were measured to understand the corrosion resistance of the stainless steel in this study. The rest potential of the stainless steel increased with increasing time after gamma-ray irradiation. The ESP, defined as the steady rest potential, increased with increasing dose rate, while increasing ESP was suppressed by contact with the zeolites. Concentration of H$$_{2}$$O$$_{2}$$ in bulk water increased with increasing dose rate. The concentration increasing was suppressed by contact with the zeolites due to decomposition of H$$_{2}$$O$$_{2}$$. There was good relationship between ESP and the concentration of H$$_{2}$$O$$_{2}$$. The VC of SUS316L contacted with the zeolites decreased with increasing Cl$$^{-}$$ ion concentration and is slightly smaller than the VC in the bulk water. The contact with the zeolites causes the suppressant of increasing ESP under the irradiation. The contact with the zeolites can reduce probability in the localized corrosion for SUS316L.

Oral presentation

Modelling of carbon steel corrosion under oxygen depleted environment; In case of the FeS corrosion film

Shibata, Toshio*; Taniguchi, Naoki; Tachikawa, Hirokazu*

no journal, , 

The corrosion model of carbon steel in the oxygen depleted environment has been developed in case of a magnetite and siderite film formed on the steel surface by assuming that diffusion of water through the corrosion film controls the corrosion process. The improved model which includes the dissolution of the magnetite film has been proved successfully to predict the corrosion rate after a long exposure term. This study aims to simulate the corrosion behavior of carbon steel forming the FeS film and compare with the behavior of the magnetite and siderite cases.

Oral presentation

Effect of dose rate on corrosion behavior of carbon steel in neutral chloride solution

Motooka, Takafumi; Yonekawa, Kazuo; Ueno, Fumiyoshi

no journal, , 

We investigated relationship between corrosion loss and the absorption dose rate by corrosion test using carbon steel in dilute neutral chloride solution under $$gamma$$-ray irradiation. As a result, the corrosion rate increased with increase of dose rate. It was confirmed that corrosion rate clearly increase twice higher by the irradiation above 500Gy/h.

Oral presentation

Effects of load on oxidation in the vicinity of crack tip of compact tension specimens immersed in a high temperature water condition

Kasahara, Shigeki; Chimi, Yasuhiro; Nishiyama, Yutaka

no journal, , 

no abstracts in English

Oral presentation

Study of preferential dissolution behavior of ferritic or austenitic phase of duplex stainless steels in crevice corrosion

Aoki, So

no journal, , 

no abstracts in English

5 (Records 1-5 displayed on this page)
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