TY - JOUR
T1 - Effects of hydrogen peroxide on intergranular stress corrosion cracking of stainless steel in high temperature water, (V)
T2 - Characterization of oxide film on stainless steel by multilateral surface analyses
AU - Murayama, Yohei
AU - Satoh, Tomonori
AU - Uchida, Shunsuke
AU - Satoh, Yoshiyuki
AU - Nagata, Shinji
AU - Satoh, Toshio
AU - Wada, Yoichi
AU - Tachibana, Masahiko
PY - 2002/11
Y1 - 2002/11
N2 - The difference in electrochemical corrosion potential of stainless steel exposed to high temperature pure water containing hydrogen peroxide (H2O2) and oxygen (O2)is caused by differences in chemical form of oxide films. In order to identify differences in oxide film structures on stainless steel after exposure to H2O2and O2environments, characteristics of the oxide films have been examined by multilateral surface analyses, e.g., X-ray diffraction (XRD), Rutherford back scattering spectroscopy (RBS), secondary ion mass spectroscopy (SIMS) and X-ray photoelectron spectroscopy (XPS). Preliminary characterization results of oxide films confirmed that the oxide film formed under the H2O2 environment consists mainly of hematite (α-Fe2O2), while that under the O2environment consists of magnetite (Fe3O4). Furthermore oxidation at the very surface of the film is much more enhanced under the H2O2environment than that under the O2environment. It was speculated that metal hydroxide plays an important role in oxidation of stainless steel in the presence of H2O2. The difference in electric resistance of oxide film causes the difference in anodic polarization properties. It is recommended that several anodic polarization curves for specimens with differently oxidized films should be prepared to calculate ECP based on the Evans diagram.
AB - The difference in electrochemical corrosion potential of stainless steel exposed to high temperature pure water containing hydrogen peroxide (H2O2) and oxygen (O2)is caused by differences in chemical form of oxide films. In order to identify differences in oxide film structures on stainless steel after exposure to H2O2and O2environments, characteristics of the oxide films have been examined by multilateral surface analyses, e.g., X-ray diffraction (XRD), Rutherford back scattering spectroscopy (RBS), secondary ion mass spectroscopy (SIMS) and X-ray photoelectron spectroscopy (XPS). Preliminary characterization results of oxide films confirmed that the oxide film formed under the H2O2 environment consists mainly of hematite (α-Fe2O2), while that under the O2environment consists of magnetite (Fe3O4). Furthermore oxidation at the very surface of the film is much more enhanced under the H2O2environment than that under the O2environment. It was speculated that metal hydroxide plays an important role in oxidation of stainless steel in the presence of H2O2. The difference in electric resistance of oxide film causes the difference in anodic polarization properties. It is recommended that several anodic polarization curves for specimens with differently oxidized films should be prepared to calculate ECP based on the Evans diagram.
KW - BWR type reactors
KW - Clacking
KW - Electrochemical corrosion
KW - Hematite
KW - Hydrogen peroxide
KW - Intergranular corrosion
KW - Magnetite
KW - Oxide film
KW - Stainless steels
KW - Surface characterization
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U2 - 10.1080/18811248.2002.9715311
DO - 10.1080/18811248.2002.9715311
M3 - Article
AN - SCOPUS:0036873326
VL - 39
SP - 1199
EP - 1206
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
SN - 0022-3131
IS - 11
ER -