Increase in Corrosion Resistance of Stainless Steels by Passivation Treatment using (H2O2+O3) Solution

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Other Title
  • （Ｈ２Ｏ２＋Ｏ３）溶液を用いた不動態化処理によるステンレス鋼の耐食性向上
  • H2O2 O3 ヨウエキ オ モチイタ フドウタイカ ショリ ニ ヨル ステンレス コウ ノ タイショク セイコウ ジョウ

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Description

It is well known that nitric acid and nitric acid+chromate solution have been applied effectively for surface treatment or passivation treatment of stainless steels. However, recent regulation of waste water quality demands that nitrogen from nitric acid and Cr(VI) ion from chromic oxide have to be removed in the waste water. This study aims to develop alternate effective surface treatment method for passivation treatment of stainless steel. H2O2 and O3 might be candidate chemicals, because they decompose to oxygen and water after reaction which are non toxic to the environment. Effect of concentration of H2O2 and O3 and temperature on the treatment potential was examined. After the treatment, pitting potential was measured to evaluate corrosion resistance of passivated stainless steels. Passivation treatment condition using H2O2+O3 solution to increase pitting potential of SUS 304 and SUS 430 stainless steel was found.

Journal

  • Corrosion Engineering

    Corrosion Engineering 59 (12), 464-467, 2010

    Japan Society of Corrosion Engineering

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