TY - GEN
T1 - Role of dissolved hydrogen in water in corrosion of alloy 600 in high temperature water
AU - Peng, Qunjia
AU - Shoji, Tetsuo
AU - Hou, Juan
AU - Sakaguchi, Kazuhiko
AU - Takeda, Yoichi
PY - 2011
Y1 - 2011
N2 - Characterization of the microstructure and chemical composition of oxide films formed on Alloy 600 in high temperature water with various dissolved hydrogen (DH) levels that allowed the Ni/NiO phase transition to occur were conducted. The results showed that increasing DH in water decreased the thickness of the oxide film, in conjunction with the increase of Cr- but decrease of Ni-concentrations in the oxide film. Further, it was found that the DH deteriorated the stability and protectiveness of the oxide film for values of DH up to and slightly above the Ni/NiO transition value. The DH effect was attributed to an oxidative dissolution process of Ni following the reduction of Ni in the oxide by hydrogen, which suggests the corrosion of Ni-base alloys in high temperature hydrogenated water is dominated by a synergic process of dissolution and oxidation.
AB - Characterization of the microstructure and chemical composition of oxide films formed on Alloy 600 in high temperature water with various dissolved hydrogen (DH) levels that allowed the Ni/NiO phase transition to occur were conducted. The results showed that increasing DH in water decreased the thickness of the oxide film, in conjunction with the increase of Cr- but decrease of Ni-concentrations in the oxide film. Further, it was found that the DH deteriorated the stability and protectiveness of the oxide film for values of DH up to and slightly above the Ni/NiO transition value. The DH effect was attributed to an oxidative dissolution process of Ni following the reduction of Ni in the oxide by hydrogen, which suggests the corrosion of Ni-base alloys in high temperature hydrogenated water is dominated by a synergic process of dissolution and oxidation.
KW - Alloy 600
KW - Corrosion
KW - Dissolved hydrogen
KW - High temperature water
UR - http://www.scopus.com/inward/record.url?scp=84867595933&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867595933&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84867595933
SN - 9781622761944
T3 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
SP - 1779
EP - 1788
BT - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
T2 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
Y2 - 7 August 2011 through 11 August 2011
ER -