TY - GEN
T1 - Effects of dissolved hydrogen on the electronic properties of the oxide film on alloy 600 in high temperature water
AU - Peng, Qunjia
AU - Takeda, Yoichi
AU - Kuniya, Jiro
AU - Shoji, Tetsuo
PY - 2009/12/1
Y1 - 2009/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:78649363066
SN - 9781617388538
T3 - 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
SP - 119
EP - 128
BT - 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
T2 - 14th International Conference on Environmental Degradation of Materials in Nuclear Power Systems Water Reactors 2009
Y2 - 23 August 2009 through 27 August 2009
ER -