2016年
Effect of nitrate on corrosion of austenitic stainless steel in boiling nitric acid solution containing chromium ions
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
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- 巻
- 53
- 号
- 9
- 開始ページ
- 1332
- 終了ページ
- 1341
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1080/00223131.2015.1107514
- 出版者・発行元
- TAYLOR & FRANCIS LTD
The oxidation behavior of chromium and the corrosion behavior of austenitic stainless steel in boiling nitric acid solution containing highly concentrated nitrates were investigated using UV-visible spectroscopic measurements, Raman spectral measurements, immersion tests, and potentiodynamic polarization measurements. The oxidation rate measurement of chromium from Cr(III) to Cr(VI) was performed by 1M boiling nitric acid solution containing each highly concentrated nitrates: Al(NO3)(3), Nd(NO3)(3), Ca(NO3)(2), Mg(NO3)(2), and NaNO3 as a simulant of uranium nitrate in uranium concentrator in reprocessing plants. As a result, the rate of chromium oxidation was different depending on the added nitrates even at the same nitric acid concentration. In addition, the oxidation rate of chromium was increased with increasing the calculated partial pressure of nitric acid in consideration of the hydration of cation of nitrates. Furthermore, the corrosion rate of type 310 stainless steel was accelerated by the solution having a high chromium oxidation rate containing nitrates. These results indicated that the acceleration of the corrosion rate in the solutions depending on the oxidation rate of chromium, and the rate is affected by the salt-effect of nitrates.
- リンク情報
- ID情報
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- DOI : 10.1080/00223131.2015.1107514
- ISSN : 0022-3131
- eISSN : 1881-1248
- Web of Science ID : WOS:000380153600009