The Corrosion Rate and the Hydrogen Absorption Behavior of Titanium under Anaerobic Condition

DOI Web Site 3 Citations 27 References

Bibliographic Information

Other Title
  • 低酸素濃度下におけるチタンの腐食速度と水素吸収挙動
  • テイサンソ ノウド カ ニ オケル チタン ノ フショク ソクド ト スイソ キュウシュウ キョドウ

Search this article

Abstract

Titanium is one of the candidate materials for overpacks as a high corrosion resistance metal. Hydrogen embrittlement is a main cause of the damage of long term integrity of titanium overpack. It is not well known about the corrosion resistance and hydrogen absorption behavior of titanium under anaerobic condition. In this study, the completely sealed ampoule test and the immersion test of titanium was carried out in aqueous solution and bentonite in order to obtain reliable data about the hydrogen generation rate and the ratio of hydrogen absorption in titanium. As the results of the tests with changing the environmental factors, obvious higher corrosion rates were observed at high carbonate (1 M) and high pH (pH 13) conditions due to the increase in the anodic reaction rate. In other conditions, corrosion rate of titanium were estimated to be in the order of 10-3∼10-2 μm/y. Almost all (<98%) of the hydrogen generated by corrosion was absorbed into titanium. Assuming that the time evolution of the hydrogen content in titanium follows linear law to make conservative assessment, the absorbed hydrogen content was estimated to be of 400∼500 ppm in 1000 years.

Journal

  • Zairyo-to-Kankyo

    Zairyo-to-Kankyo 55 (11), 485-494, 2006

    Japan Society of Corrosion Engineering

Citations (3)*help

See more

References(27)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top