Distribution of Cobalt in Surface Oxide Film of Type 304 Stainless Steel Exposed to High-Temperature Water Quantitative Analysis by Glow Discharge Optical Emission Spectrometry

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著者

    • ONO Shoichi
    • Kashiwa Laboratory, Institute of Research and Innovation
    • TACHIBANA Koji
    • Department of Chemistry, Faculty of Science, Science University of Tokyo
    • ISHIGURE Kenkichi
    • Department of Quantum Engineering and System Science, Faculty of Engineering, University of Tokyo

抄録

The glow discharge optical emission spectrometry (GDS) was applied to determine the cobalt distribution accumulated in the corrosion film of type 304 stainless steel that was exposed to demineralized water with below 5ppb of dissolved oxygen content at 561K. The exposure test was carried out using two parallel high-temperature and high-pressure water experimental loops, one with 3ppb non-active cobalt added and the other without. The structure and element depth distributions of the corroded specimen surfaces were analyzed by EPMA, XRD, XPS and GDS. The corrosion film of the specimen exposed for 1, 000h had a clear double layer structure consisting of an iron-rich outer layer 3μm in thickness and a chromium-rich inner layer 0.5μm in thickness. The cobalt distributions in the corrosion film could successfully be determined by GDS. The distribution of cobalt was peculiar in the corrosion film and the distribution curves had a peak around the boundary between the two layers. The cobalt concentration tended to increase linearly with the exposure time.

収録刊行物

  • Journal of nuclear science and technology

    Journal of nuclear science and technology 32(2), 125-132, 1995-02-25

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002072050
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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