2017年10月
Corrosion behavior of ODS steels with several chromium contents in hot nitric acid solutions
JOURNAL OF NUCLEAR MATERIALS
- ,
- ,
- ,
- 巻
- 494
- 号
- 開始ページ
- 219
- 終了ページ
- 226
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jnucmat.2017.07.008
- 出版者・発行元
- ELSEVIER SCIENCE BV
Oxide dispersion strengthened (ODS) steel cladding tubes have been developed for fast reactors. Tempered martensitic ODS steels with 9 and 11 wt% of chromium (9Cr-, 11Cr-ODS steel) are the candidate material in research being carried out at JAEA. In this work, fundamental immersion tests and electrochemical tests of 9 to 12Cr-ODS steels were systematically conducted in various nitric acid solutions at 95 degrees C. The corrosion rate decreased exponentially with effective solute chromium concentration (C-reff) and nitric acid concentration. Addition of vanadium (V) and ruthenium (Ru) also decreased the corrosion rate. The combination of low Creff and dilute nitric acid could not avoid the active mass dissolution during active domain at the beginning of immersion, and the corrosion rate was high. Higher C-reff decreased the partial anodic current during the active domain and assisted the passivation of the surface of the steel. Concentrated nitric acid and addition of Ru and V increased partial cathodic current and shifted the corrosion potential to noble side. These effects should have prevented the active mass dissolution and decreased the corrosion rate. (C) 2017 Elsevier B.V. All rights reserved.
- リンク情報
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- DOI
- https://doi.org/10.1016/j.jnucmat.2017.07.008
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000410561200026&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85025842902&partnerID=MN8TOARS
- ID情報
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- DOI : 10.1016/j.jnucmat.2017.07.008
- ISSN : 0022-3115
- eISSN : 1873-4820
- ORCIDのPut Code : 93073074
- SCOPUS ID : 85025842902
- Web of Science ID : WOS:000410561200026