SUS304鋼焼鈍材の脱スケール過程における溶解挙動 Dissolution Behavior of Annealed SUS 304 Stainless Steel in Descaling Process

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Analytical and electrochemical methods were used to study the dissolution behavior of annealed SUS 304 stainless steel in the descaling process in order to determine the annealing conditions needed to make scale easily descalable. The following conclusions are advanced:<br>(1) With anodic electrolysis in 20% Na<sub>2</sub>SO<sub>4</sub> solution (pH 3), oxides of Cr, Mn and Fe in the outer layer of the scale are dissolved relatively quickly, but Fe in the inner layer is dissolved at a considerably low rate. The amount of dissolved Fe increases markedly at a potential above 1.4V vs. SCE, which is nobler than that of Cr and Mn by 0.2∼0.3V. Cathodic electrolysis is of no use in dissolving these oxides. Si oxide in the inner layer of the scale is not dissolved by electrolysis in 20% Na<sub>2</sub>SO<sub>4</sub> solution and obstructs the dissolution of other coexisting elements such as Cr and Fe, but it is dissolved by immersion in nitric-hydrofluoric acid.<br>(2) To reduce the time required for descaling, it is important to lower the Si and Fe content in the scale and raise the Cr and Mn content, while making the scale thinner.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 47(4), 325-329, 1996-04 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002256090
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    3947922
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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