Effects of dissolved hydrogen on the electronic properties of the oxide film on alloy 600 in high temperature water

Qunjia Peng, Yoichi Takeda, Jiro Kuniya, Tetsuo Shoji

研究成果: Conference contribution

抄録

The dissolved hydrogen (DH) in water has shown detrimental effects to the primary water stress corrosion cracking (PWSCC) performance of nickel-based alloys. In efforts to improve the understanding of the PWSCC mechanism, effects of DH on the electronic properties of the oxide film on Alloy 600 in high temperature water were studied by a combination of in-situ electrochemical techniques: dc electric resistance measurements by contact electric resistance (CER) technique and ac electrochemical impedance spectroscopy (EIS). It is revealed that the oxide film exhibited n-type semiconductivity. Dependences of the film resistance, charge transfer resistance and ionic defect transport resistance on DH obtained by the experiment suggest that increasing DH could increase the defectiveness of the film, in conjunction with an enhanced ionic defect transport in the film. The effects of DH on PWSCC are discussed in combination with the DH-dependent oxidation thermodynamics and kinetics based on the current results and the DH dependence of the oxide microstructure from literatures.

本文言語English
ホスト出版物のタイトル14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
ページ119-128
ページ数10
出版ステータスPublished - 2009 12 1
イベント14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 - Virginia Beach, VA, United States
継続期間: 2009 8 232009 8 27

出版物シリーズ

名前14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
1

Other

Other14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
国/地域United States
CityVirginia Beach, VA
Period09/8/2309/8/27

ASJC Scopus subject areas

  • 原子力エネルギーおよび原子力工学
  • 環境工学

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