Effect of Boiling under Reduced Pressure on Corrosion of Stainless Steels in Nitric Acid Solution Simulating High-level Radioactive Liquid Waste

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  • 高レベル放射性廃液模擬環境でのステンレス鋼腐食に及ぼす減圧沸騰の影響
  • コウレベル ホウシャセイ ハイエキ モギ カンキョウ デ ノ ステンレスコウ フショク ニ オヨボス ゲンアツ フットウ ノ エイキョウ

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Abstract

In order to investigate the effect of boiling under reduced pressure on corrosion of stainless steel in the nitric acid solution, the corrosion tests simulating the high-level radioactive liquid waste evaporator were performed. The results of immersion tests of stainless steels in the solution with and without boiling showed that the corrosion rates in boiling solution were larger than those in not boiling solution in case of same temperature of solution. Moreover, the cathode polarization curves showed that the corrosion potential of stainless steel in boiling solutions were shifted nobler, and the current intensity became larger than that in not boiling solutions. According to these results, it can be concluded that boiling of solution under reduced pressure accelerate the corrosion rates.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 65 (4), 134-137, 2016

    Japan Society of Corrosion Engineering

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