Electrochemical dissolution of nickel-rheniumcontaining alloys
This work is devoted to the study of electrochemical dissolution of nickel-rhenium (10% wt.) alloy and nickel-rhenium (20% wt.) alloy. The study was carried out under pulsed current in acidic electrolytes (sulfuric, nitric and hydrochloric acids). It was established that the highest dissolution rate...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | Russian |
| Published: |
MIREA - Russian Technological University
2015-04-01
|
| Series: | Тонкие химические технологии |
| Subjects: | |
| Online Access: | https://www.finechem-mirea.ru/jour/article/view/230 |
| _version_ | 1797882057420963840 |
|---|---|
| author | T. B. Yelemessov O. V. Chernyshova D. T. Shakirova D. V. Drobot P. S. Dzhumaev |
| author_facet | T. B. Yelemessov O. V. Chernyshova D. T. Shakirova D. V. Drobot P. S. Dzhumaev |
| author_sort | T. B. Yelemessov |
| collection | DOAJ |
| description | This work is devoted to the study of electrochemical dissolution of nickel-rhenium (10% wt.) alloy and nickel-rhenium (20% wt.) alloy. The study was carried out under pulsed current in acidic electrolytes (sulfuric, nitric and hydrochloric acids). It was established that the highest dissolution rate of alloys was achieved at the current pulse amplitude of 1.0-1.5 A, current pulse duration of 500 ms, pause between pulses 50 ms. It is difficult to know exactly which areas meet the electrochemical reaction, but at the expense of depolarization the polarization curve is divided into several sections, each of which correspond to electrochemical reactions. It was shown that both the galvanostatic and potentiostatic modes occur in the selective dissolution of nickel and rhenium. Moreover, the rate of dissolution of nickel and rhenium depends on the acidic electrolyte (sulfuric acid, nitric acid, hydrochloric acid), the ratio of the concentrations of components in the solution, and the content of nickel and rhenium on the surface of the alloy in the nickel-rhenium (10% wt.) and nickel-rhenium (20% wt.) alloys. It was revealed that the highest dissolution rate for the nickel-rhenium (10% wt.) alloy (10.76 g/A·h) is achieved by dissolving in nitric acid, which is less than the dissolution rate of the nickelrhenium (20% wt.) alloy (12.08 g/A·h) in nitric acid. In contrast, in sulfuric and hydrochloric acids the dissolution rate of nickel-rhenium (20% wt.) alloy is much higher compared to the nickel-rhenium (10% wt.) alloy. |
| first_indexed | 2024-04-10T03:30:01Z |
| format | Article |
| id | doaj.art-a32f0159916e4f449cff0d4ae978224a |
| institution | Directory Open Access Journal |
| issn | 2410-6593 2686-7575 |
| language | Russian |
| last_indexed | 2024-04-10T03:30:01Z |
| publishDate | 2015-04-01 |
| publisher | MIREA - Russian Technological University |
| record_format | Article |
| series | Тонкие химические технологии |
| spelling | doaj.art-a32f0159916e4f449cff0d4ae978224a2023-03-13T07:25:36ZrusMIREA - Russian Technological UniversityТонкие химические технологии2410-65932686-75752015-04-011025360224Electrochemical dissolution of nickel-rheniumcontaining alloysT. B. Yelemessov0O. V. Chernyshova1D. T. Shakirova2D. V. Drobot3P. S. Dzhumaev4M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409This work is devoted to the study of electrochemical dissolution of nickel-rhenium (10% wt.) alloy and nickel-rhenium (20% wt.) alloy. The study was carried out under pulsed current in acidic electrolytes (sulfuric, nitric and hydrochloric acids). It was established that the highest dissolution rate of alloys was achieved at the current pulse amplitude of 1.0-1.5 A, current pulse duration of 500 ms, pause between pulses 50 ms. It is difficult to know exactly which areas meet the electrochemical reaction, but at the expense of depolarization the polarization curve is divided into several sections, each of which correspond to electrochemical reactions. It was shown that both the galvanostatic and potentiostatic modes occur in the selective dissolution of nickel and rhenium. Moreover, the rate of dissolution of nickel and rhenium depends on the acidic electrolyte (sulfuric acid, nitric acid, hydrochloric acid), the ratio of the concentrations of components in the solution, and the content of nickel and rhenium on the surface of the alloy in the nickel-rhenium (10% wt.) and nickel-rhenium (20% wt.) alloys. It was revealed that the highest dissolution rate for the nickel-rhenium (10% wt.) alloy (10.76 g/A·h) is achieved by dissolving in nitric acid, which is less than the dissolution rate of the nickelrhenium (20% wt.) alloy (12.08 g/A·h) in nitric acid. In contrast, in sulfuric and hydrochloric acids the dissolution rate of nickel-rhenium (20% wt.) alloy is much higher compared to the nickel-rhenium (10% wt.) alloy.https://www.finechem-mirea.ru/jour/article/view/230nickel-rhenium alloys, potential, anodic dissolution, polarization curve, amperage, impulse current. |
| spellingShingle | T. B. Yelemessov O. V. Chernyshova D. T. Shakirova D. V. Drobot P. S. Dzhumaev Electrochemical dissolution of nickel-rheniumcontaining alloys Тонкие химические технологии nickel-rhenium alloys, potential, anodic dissolution, polarization curve, amperage, impulse current. |
| title | Electrochemical dissolution of nickel-rheniumcontaining alloys |
| title_full | Electrochemical dissolution of nickel-rheniumcontaining alloys |
| title_fullStr | Electrochemical dissolution of nickel-rheniumcontaining alloys |
| title_full_unstemmed | Electrochemical dissolution of nickel-rheniumcontaining alloys |
| title_short | Electrochemical dissolution of nickel-rheniumcontaining alloys |
| title_sort | electrochemical dissolution of nickel rheniumcontaining alloys |
| topic | nickel-rhenium alloys, potential, anodic dissolution, polarization curve, amperage, impulse current. |
| url | https://www.finechem-mirea.ru/jour/article/view/230 |
| work_keys_str_mv | AT tbyelemessov electrochemicaldissolutionofnickelrheniumcontainingalloys AT ovchernyshova electrochemicaldissolutionofnickelrheniumcontainingalloys AT dtshakirova electrochemicaldissolutionofnickelrheniumcontainingalloys AT dvdrobot electrochemicaldissolutionofnickelrheniumcontainingalloys AT psdzhumaev electrochemicaldissolutionofnickelrheniumcontainingalloys |