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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original languageEnglish
Title of host publication14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Pages119-128
Number of pages10
Publication statusPublished - 2009 Dec 1
Event14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 - Virginia Beach, VA, United States
Duration: 2009 Aug 23 → 2009 Aug 27

Publication series

Name14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Volume1

Other

Other14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
CountryUnited States
CityVirginia Beach, VA
Period09/8/23 → 09/8/27

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Environmental Engineering

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    Peng, Q., Takeda, Y., Kuniya, J., & Shoji, T. (2009). Effects of dissolved hydrogen on the electronic properties of the oxide film on alloy 600 in high temperature water. In 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009 (pp. 119-128). (14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009; Vol. 1).