Email this article Electrochemical studies of technetium–ruthenium alloys in HNO3: Implications for the behavior of technetium waste forms
- Authors: Poineau F.1, Koury D.J.1, Bertoia J.1, Kolman D.G.2, Mausolf E.J.1, Goff G.S.2, Kim E.3, Jarvinen G.4, German K.E.5,6, Czerwinski K.R.1
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Affiliations:
- Department of Chemistry
- Materials Corrosion and Environmental Effects Laboratory, Materials Science and Technology Division
- Department of Physics and Astronomy
- Seaborg Institute, Stockpile Manufacturing and Support Directorate
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Moscow Branch
- Issue: Vol 59, No 1 (2017)
- Pages: 41-47
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/223705
- DOI: https://doi.org/10.1134/S1066362217010040
- ID: 223705
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Abstract
The electrochemical behavior of Tc–Ru alloys (Ru content, at. %: 3.2, 5.2, 20.1, 24.7) in 1 M HNO3 was studied. The transpassivation potentials (Etp) of Tc–Ru alloys were determined by linear voltammetry. The results show that the transpassivation potentials of the alloys increase with the Ru content. To understand the dissolution mechanism, electrolysis experiments at 1.2 V vs. Ag/AgCl were performed; the corrosion products of the alloys were characterized in solution by UV-visible spectroscopy and electrospray ionization mass spectrometry (ESI-MS). For Ru, a polymeric Ru(IV) species was detected, while for Tc the speciation was dominated by TcO4–.
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About the authors
F. Poineau
Department of Chemistry
Author for correspondence.
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
D. J. Koury
Department of Chemistry
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
J. Bertoia
Department of Chemistry
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
D. G. Kolman
Materials Corrosion and Environmental Effects Laboratory, Materials Science and Technology Division
Email: poineauf@unlv.nevada.edu
United States, Los Alamos, NM, 87545
E. J. Mausolf
Department of Chemistry
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
G. S. Goff
Materials Corrosion and Environmental Effects Laboratory, Materials Science and Technology Division
Email: poineauf@unlv.nevada.edu
United States, Los Alamos, NM, 87545
E. Kim
Department of Physics and Astronomy
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
G. Jarvinen
Seaborg Institute, Stockpile Manufacturing and Support Directorate
Email: poineauf@unlv.nevada.edu
United States, Los Alamos, NM, 87545
K. E. German
Frumkin Institute of Physical Chemistry and Electrochemistry; Moscow Branch
Email: poineauf@unlv.nevada.edu
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071; Krasnobogatyrskaya ul. 2, Moscow, 107564
K. R. Czerwinski
Department of Chemistry
Email: poineauf@unlv.nevada.edu
United States, Las Vegas, NV, 89154
