Aluminum Corrosion under Alkaline Circumstances while LiN0_3 Concentration Is Lowered

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Experiments were conducted to examine the enhancement of hydrogen gas generation when the LiH 2AlO<SUB>2</SUB>•5H<SUB>2</SUB>O (or"Li-Al") preservation film formed on aluminum materials was gradually depleted after land disposal of cement-solidified dry active wastes.<BR>In these experiments, an aluminum specimen overlaid with the Li-Al preservation film was placed in a reaction beaker and exposed to flowing alkaline water (pH 12.3) to deplete lithium content of the Li-Al preservation film in lithium content gradually. Then, the volume of hydrogen gas generation from the specimen and lithium concentration in the reaction beaker outflow were measured. The specimen surface was also examined by X-ray diffraction and SIMS to see if there was any change in its structure.<BR>As water flow rate was lowered, depletion of the Li-Al preservation film became slower, so that the aluminum corrosion rate, which was calculated from results of the hydrogen gas generation measurements, was small. Because the actual flow rate was very small, it did not seem a quick increase in gas generation occurred. In addition, hydrogen gas generation was smaller, too. This was because part of the surface of the Li-Al layer dissolved to form a fresh Al(OH)3 layer which covered the Li-Al preservation film left and prevented its dissolution.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 35(3), 226-233, 1998-03-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002079193
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • NDL 記事登録ID
    4440348
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A460
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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