Corrosion Modeling for Carbon Steel under Oxygen Depleted Underground Environment
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- Shibata Toshio
- Osaka University
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- Watanabe Masatoshi
- Nuclear Safety Research Center, Japan Atomic Energy Agency (JAEA)
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- Taniguchi Naoki
- Geological Isolation Research and Development Directorate, Japan Atomic Energy Agency (JAEA)
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- Shimizu Akihiko
- Nuclear Safety Research Association (NSRA)
Bibliographic Information
- Other Title
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- 酸素欠乏地下環境における炭素鋼腐食モデリング
- サンソ ケツボウ チカ カンキョウ ニ オケル タンソコウ フショク モデリング
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Abstract
In the oxygen depleted underground neutral aqueous solution environment, carbon steel reacts with H2O, producing H2 gas and forming corrosion film on the steel surface. Corrosion rate is controlled by diffusion of reaction species through corrosion film. Diffusion constants of some species working in the corrosion process were obtained from literatures. However, no data were found on the diffusion constant of H2O in iron oxides, which were estimated based on an appropriate assumption. Mass transfer model for the corrosion rate was used to simulate the corrosion rate of carbon steel. Liquid phase diffusion model of Fe2+or H2O through pores in the corrosion film and solid phase diffusion model of H2O through corrosion film itself were examined by simulation using the spread sheet of Excel. Change in corrosion current density and corrosion loss with time and pH and temperature dependence of corrosion current density were examined. By comparing simulated results with the experimental data, it was suggested that the solid phase diffusion of H2O in the corrosion film controls the corrosion rate of carbon steel in oxygen depleted environment.
Journal
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- Zairyo-to-Kankyo
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Zairyo-to-Kankyo 62 (2), 70-77, 2013
Japan Society of Corrosion Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390001206259159424
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- NII Article ID
- 10031157201
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- NII Book ID
- AN10235427
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- COI
- 1:CAS:528:DC%2BC3sXnsVGqsrc%3D
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- ISSN
- 18819664
- 09170480
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- NDL BIB ID
- 024294325
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed