Effects of Hydrogen Peroxide on Corrosion of Stainless Steel, (III) : Evaluation of Electric Resistance of Oxide Film by Equivalent Circuit Analysis for Frequency Dependent Complex Impedances
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概要
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Corrosive conditions in BWRs are determined mainly by hydrogen peroxide (H2O2). Then, a high temperature, high-pressure H2O2 water loop was fabricated to identify the effects of H2O2 on corrosion and stress corrosion cracking of stainless steel.By changing concentrations of H2O2 and O2, in situ measurements of electrochemical corrosion potential (ECP) and frequency dependent complex impedance (FDCI) of test specimens were carried out and then characteristics of oxide film on the specimens were evaluated by analyzing FDCI data based on the equivalent circuit analysis. The following points were experimentally confirmed.(1) The ECP and FDCI data of the specimens exposed to 100 ppb H2O2 were not affected by co-existing O2 with the same level oxidant concentration and they were also not affected by pre-exposure to 200 ppb O2. From the viewpoint of ECP, this meant that corrosive conditions of hydrogen water chemistry were the same as those of normal water chemistry.(2) The low frequency semi-circles of the FDCI data for the specimens exposed to 100 ppb H2O2 reached a saturation value which was much smaller than saturation values for specimens exposed to 200 ppb O2 and to 10 ppb H2O2.(3) Smaller oxide dissolution resistance and larger electric resistance of the oxide film were obtained for the specimens exposed to 100 ppb H2O2. This caused ECP to increase by shifting the anodic polarization curve of stainless steel to the high potential side.
- 社団法人 日本原子力学会の論文
- 2005-01-25
著者
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UCHIDA Shunsuke
The Institute of Applied Energy
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Uchida S
Japan Atomic Energy Agency
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Uchida S
Tohoku Univ. Sendai
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Wada Y
Energy And Environmental Systems Laboratory Hitachi Ltd.
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Wada Yoichi
Power And Industrial Systems R& D Division Hitachi Ltd.
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Wada Yoichi
Energy And Environmental Systems Lab. Hitachi Ltd.
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Wada Yoichi
Energy And Environmental Systems Laboratory Hitachi Ltd.
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Ishigure K
Saitama Inst. Of Technol. Saitama
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Ishigure Kenkichi
Quantum Science And Energy Engineering Department Graduate School Of Engineering Tohoku University
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Ishigure K
Department Of Quantum Engineering And Systems Science The University Of Tokyo
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Satoh Y
Quantum Science And Energy Engineering Department Graduate School Of Engineering Tohoku University
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Wada Yoichi
Power And Industrial Systems R&d Laboratory Hitachi Ltd.
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Satoh Yoshiyuki
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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MIYAZAWA Takahiro
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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UCHIDA Shunsuke
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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SATOH Tomonori
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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MORISHIMA Yusuke
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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HIROSE Tatsuya
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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SATOH Yoshiyuki
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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IINUMA Koichi
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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SUGAMA Junichi
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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YAMASHIRO Naoya
Quantum Science and Energy Engineering Department, Graduate School of Engineering, Tohoku University
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TACHIBANA Masahiko
Power and Industrial Systems R&D Laboratory, Hitachi, Ltd.
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Sugama Jun-ichi
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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Iinuma Kouichi
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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SATOH Tomonori
Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency
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Uchida Shunsuke
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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Uchida Shunsuke
Power And Industrial Systems R&d Division Hitachi Ltd.
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Uchida Shunsuke
Energy Research Laboratory Hitachi Ltd.
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Murayama Yohei
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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Hirose Tatsuya
Quantum Science And Energy Engineering Department Graduate School Of Engineering Tohoku University
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Satoh Tomonori
Nuclear Science And Engineering Directorate Japan Atomic Energy Agency
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Yamashiro Naoya
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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Miyazawa Takahiro
Quantum Science And Energy Engineering Department Graduate School Of Engineering Tohoku University
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Tachibana Masahiko
Energy And Environmental Systems Laboratory Hitachi Ltd.
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Morishima Yusuke
Department Of Quantum Science And Energy Engineering Graduate School Of Engineering Tohoku Universit
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Ishida Kazushige
Energy And Environmental Systems Laboratory Hitachi Ltd.
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Ishida Kazushige
Power & Industrial Systems R&d Laboratory Hitachi Ltd.
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Wada Yoichi
Power & Industrial Systems R&d Laboratory Hitachi Ltd.
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Morishima Yusuke
Quantum Science And Energy Engineering Department Graduate School Of Engineering Tohoku University
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