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|Title:||Corrosion of ferritic and ferritic-martensitic steels in NaCl-KCl-VCl 2 melts|
|Authors:||Polovov, I. B.|
Vinogradov, D. A.
Abramov, A. V.
Shak, A. V.
Volkovich, V. A.
Rebrin, O. I.
Griffiths, T. R.
|Abstract:||The corrosion resistance of ferritic (08Kh17T) and ferriticmartensitic (12Kh13) type steels was investigated at 750 °C in NaCl-KCl-VCl2 melts. The mechanism of corrosion of 12Kh13 ferritic-martensitic steel in NaCl-KCl-VCl2 melts includes two parallel processes: formation of new excessive phases inducing Fe3C (σ-phase)|melt|steel microgalvanic pairs, and reaction of most electronegative steel components (Mn and Cr) with V3+ ions formed due to disproportion of V2+. Contacting samples of 08Kh17T with NaCl-KCl-VCl2 melts resulted in no structural changes in the steel samples. In this case the mechanism of corrosion involves only one stage: disproportion reaction of V(II) with the formation V-Fe alloy and V3+ ions and further oxidation of chromium in the steel by V(III). It was shown, that the presence of a suitable reducing agent in the contact with the melt (for example, metallic vanadium) can prevent the steel destruction. Copyright © 2012 by The Electrochemical Society.|
|Conference name:||18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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