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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
PublisherAtomic Energy Society of Japan
Pages2088-2094
Number of pages7
ISBN (Electronic)9781617386084
Publication statusPublished - 2009 Jan 1
Externally publishedYes
EventInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009 - Shinjuku, Tokyo, Japan
Duration: 2009 May 102009 May 14

Publication series

NameInternational Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009
Volume3

Other

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

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

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  • Cite this

    Kato, T., Hazuku, T., Motoda, S. I., Takamasa, T., Hishida, M., Kumata, T., Abe, H., & Furuya, M. (2009). Crevice corrosion control for stainless steel using radiation-induced surface activation. In International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009 (pp. 2088-2094). (International Congress on Advances in Nuclear Power Plants 2009, ICAPP 2009; Vol. 3). Atomic Energy Society of Japan.