Crevice corrosion control for stainless steel using radiation-induced surface activation

Taichi Kato*, Tatsuya Hazuku, Shin Ichi Motoda, Tomoji Takamasa, Mamoru Hishida, Takanori Kumata, Hiroaki Abe, Masahiro Furuya

*この研究の対応する著者

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

When a semiconductor film is irradiated by γ-rays, excited electrons are transferred to a base metal in contact with the film, resulting in cathodic-anodic reactions and surface activation of the metal oxide film. The authors first produced radiation-induced surface activation (RISA) in 2000 and have used it in the development of a new corrosion protection method. This report describes a corrosion mitigation technique based on RISA to prevent crevice corrosion in stainless steel, using low-intensity radiation. Experimental results show that an electrode potential of -100 mV vs. Ag/AgCl was produced and maintained on TiO2-coated SUS304 stainless steel specimens immersed in artificial seawater and in close contact with a small, sealed 60Co source (external irradiation) or activated by neutron irradiation to become self-exciting, with no corrosion observed for more than 7 days. In contrast, the potential of a specimen without a radiation source decreased to less than -280 mV vs. Ag/AgCl and crevice corrosion occurred beneath the O-ring within a few days. The corrosion control mechanism was explored by measurement of dissolved oxygen and iron ions in the solution.

本文言語English
ホスト出版物のタイトルInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
出版社Atomic Energy Society of Japan
ページ2088-2094
ページ数7
ISBN(電子版)9781617386084
出版ステータスPublished - 2009 1 1
外部発表はい
イベントInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009 - Shinjuku, Tokyo, Japan
継続期間: 2009 5 102009 5 14

出版物シリーズ

名前International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
3

Other

OtherInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
国/地域Japan
CityShinjuku, Tokyo
Period09/5/1009/5/14

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 原子力エネルギーおよび原子力工学

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