超臨界水環境におけるオーステナイト系ステンレス鋼の腐食 Corrosion of SUS316L in Super Critical Water Environments

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  Water of 648K and 22.1MPa or more is called super critical water, and it has an excellent organic solvent characteristic. Recently, the application of supercritical water for various fields is being attempted. Especially, supercritical water oxidation is researched as an effective processing method of PCB and radioactive waste. However, metal corrodes in supercritical water environments, especially, reactive containers corrode conspicuously with hydrochloric acid generated in the processing of PCB. <br>  Therefore, corrosion is a serious problem in terms of the lifespan of the reactive container. <br>  Moreover, economical problems are also faced because hastelloy used in general is expensive. In this study, the corrosion behavior of 99.9%Fe, 99.9%Ni, 99.9%Cr and SUS316L was investigated in supercritical water at 523 to 873K and 20 to 60MPa for 3.6×10<sup>3</sup> to 5.22×10<sup>5</sup>sec. Similar tests of surface treated specimens were carried out. As a result, the corrosion rate increased as the examination temperature increased in an materials. Moreover, transpassive corrosion was observed in Cr at 623K. The corrosion rate increased as pressure increased. Moreover, corrosion of metals in super critical water was influenced by the permittivity of water. Nitrided specimens showed excellent corrosion resistivity in super critical water environments.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society  

    鋳造工学 = Journal of Japan Foundry Engineering Society 78(4), 181-186, 2006-04-25 

    Japan Foundry Engineering Society

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各種コード

  • NII論文ID(NAID)
    10018133228
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    7933195
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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