Electrochemical Studies of Technetium–ruthenium Alloys in HNO3: Implications for the Behavior of Technetium Waste Forms

Authors

Frederic Poineau, University of Nevada, Las VegasFollow
Daniel J. Koury, University of Nevada, Las VegasFollow
J. Bertoia, University of Nevada, Las VegasFollow
D. G. Kolman, Los Alamos National LaboratoryFollow
E. J. Mausolf, University of Nevada, Las VegasFollow
G. S. Goff, Los Alamos National LaboratoryFollow
Eunja Kim, University of Nevada, Las VegasFollow
G. Jarvinen, Los Alamos National LaboratoryFollow
K. E. German, Reaviz Medical UniversityFollow
Kenneth R. Czerwinski, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

1-1-2017

Publication Title

Radiochemistry

Volume

59

Issue

1

First page number:

41

Last page number:

47

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 –. © 2017, Pleiades Publishing, Inc.

Language

english

Repository Citation

Poineau, F., Koury, D. J., Bertoia, J., Kolman, D. G., Mausolf, E. J., Goff, G. S., Kim, E., Jarvinen, G., German, K. E., Czerwinski, K. R. (2017). Electrochemical Studies of Technetium–ruthenium Alloys in HNO3: Implications for the Behavior of Technetium Waste Forms. Radiochemistry, 59(1), 41-47.
http://dx.doi.org/10.1134/S1066362217010040