| Autor: |
Rotmanov, K., Maslennikov, A., Pichuzhkina, E., Peretrukhin, V. |
| Předmět: |
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| Zdroj: |
Radiochemistry; Mar2015, Vol. 57 Issue 2, p131-135, 5p |
| Abstrakt: |
Electrochemical oxidation of Tc-Ru alloys in 0.5-6.0 M HNO solutions was studied by linear voltammetry. Quantitative characteristics of the corrosion and dissolution processes were determined, namely: corrosion potentials E, exchange current densities j and the corresponding corrosion rates v, and transpassivation potentials E. The electrode reactions occurring in the course of electrochemical dissolution of Tc-Ru alloy differ essentially from those occurring on the surface of Tc metal electrodes. The exchange current density j and corrosion rate v drastically decrease on alloying technetium with ruthenium. The corrosion potential E of Tc-Ru alloys in HNO solutions increases with an increase in the HNO concentration and, at the same time, is virtually independent of the alloy composition. Comparison of the transpassivation potentials of Tc-Ru alloys with those on electrodes made of pure Tc and Ru shows that transpassivation potentials of Tc-Ru alloys were closer to E of Ru metal throughout the examined range of HNO concentrations. Thus, alloying of technetium with ruthenium enhances the resistance of the alloy to electrochemical oxidation in HNO solutions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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