Al-Mg electrodeposition using chloride-based molten salts
Al-Mg alloys were potentiostatically electrodeposited from electrolyte with AlCl3, NaCl, KCl and MgCl2 at 180 °C for aircraft applications. The electrode setup includes a Cu cathode, Pt-mesh anode, and Al-rod pseudo-reference electrode. Cyclic voltammetry (CV) reveals the Al deposition sources as A...
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International Association of Physical Chemists (IAPC)
2024-11-01
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| Series: | Journal of Electrochemical Science and Engineering |
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| Online Access: | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2518 |
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| author | Sreesvarna Bhaskaramohan M. J. N. V. Prasad G. V. Dattu Jonnalagadda Sankara Sarma Tatiparti |
| author_facet | Sreesvarna Bhaskaramohan M. J. N. V. Prasad G. V. Dattu Jonnalagadda Sankara Sarma Tatiparti |
| author_sort | Sreesvarna Bhaskaramohan |
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Al-Mg alloys were potentiostatically electrodeposited from electrolyte with AlCl3, NaCl, KCl and MgCl2 at 180 °C for aircraft applications. The electrode setup includes a Cu cathode, Pt-mesh anode, and Al-rod pseudo-reference electrode. Cyclic voltammetry (CV) reveals the Al deposition sources as Al2Cl7-and AlCl4-. The Mg deposition source can be a reaction between Al2Cl7- and MgCl2 and MgCl2 dissociation (both releasing Mg2+). Depositions at overpotentials: -1.03, -1.05, -1.06, and -1.10 V show current density-time curves with almost steady-state j, indicating planar diffusional growth. This is confirmed by layer-like morphologies with near-globular growth features. The average feature size decreases to -1.06 V and increases slightly at -1.10 V due to further deposition over the existing features. The deposit composition (Mg content) increases from 0.36 to 5.68 at.% from -1.03 to -1.10 V. Such a wide range of Mg content is obtained through minimal compositional changes in spent electrolytes, indicating the ease of less-noble Mg deposition. Al-Mg deposition scheme is devised with Al and Mg deposition perceived as Al3+ + 3e- Al and Mg2+ + 2e- Mg; and 2Cl- Cl2(↑)+ 2e- supplying electrons for deposition.
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| format | Article |
| id | doaj-art-0ca49d831aec4176a710dd420baee9d1 |
| institution | Kabale University |
| issn | 1847-9286 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | International Association of Physical Chemists (IAPC) |
| record_format | Article |
| series | Journal of Electrochemical Science and Engineering |
| spelling | doaj-art-0ca49d831aec4176a710dd420baee9d12024-12-01T07:08:06ZengInternational Association of Physical Chemists (IAPC)Journal of Electrochemical Science and Engineering1847-92862024-11-0110.5599/jese.2518Al-Mg electrodeposition using chloride-based molten saltsSreesvarna Bhaskaramohan0M. J. N. V. Prasad1G. V. Dattu Jonnalagadda2Sankara Sarma Tatiparti3Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai 400076, IndiaDepartment of Metallurgical Engineering and Science, Indian Institute of Technology Bombay, Mumbai 400076, IndiaJohn F Welch Technology Centre, General Electric India Industrial Pvt. Ltd., Bangalore 560066, IndiaDepartment of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India Al-Mg alloys were potentiostatically electrodeposited from electrolyte with AlCl3, NaCl, KCl and MgCl2 at 180 °C for aircraft applications. The electrode setup includes a Cu cathode, Pt-mesh anode, and Al-rod pseudo-reference electrode. Cyclic voltammetry (CV) reveals the Al deposition sources as Al2Cl7-and AlCl4-. The Mg deposition source can be a reaction between Al2Cl7- and MgCl2 and MgCl2 dissociation (both releasing Mg2+). Depositions at overpotentials: -1.03, -1.05, -1.06, and -1.10 V show current density-time curves with almost steady-state j, indicating planar diffusional growth. This is confirmed by layer-like morphologies with near-globular growth features. The average feature size decreases to -1.06 V and increases slightly at -1.10 V due to further deposition over the existing features. The deposit composition (Mg content) increases from 0.36 to 5.68 at.% from -1.03 to -1.10 V. Such a wide range of Mg content is obtained through minimal compositional changes in spent electrolytes, indicating the ease of less-noble Mg deposition. Al-Mg deposition scheme is devised with Al and Mg deposition perceived as Al3+ + 3e- Al and Mg2+ + 2e- Mg; and 2Cl- Cl2(↑)+ 2e- supplying electrons for deposition. https://pub.iapchem.org/ojs/index.php/JESE/article/view/2518Aluminummagnesiumpotentiostatic depositionmorphologycompositionscheme |
| spellingShingle | Sreesvarna Bhaskaramohan M. J. N. V. Prasad G. V. Dattu Jonnalagadda Sankara Sarma Tatiparti Al-Mg electrodeposition using chloride-based molten salts Journal of Electrochemical Science and Engineering Aluminum magnesium potentiostatic deposition morphology composition scheme |
| title | Al-Mg electrodeposition using chloride-based molten salts |
| title_full | Al-Mg electrodeposition using chloride-based molten salts |
| title_fullStr | Al-Mg electrodeposition using chloride-based molten salts |
| title_full_unstemmed | Al-Mg electrodeposition using chloride-based molten salts |
| title_short | Al-Mg electrodeposition using chloride-based molten salts |
| title_sort | al mg electrodeposition using chloride based molten salts |
| topic | Aluminum magnesium potentiostatic deposition morphology composition scheme |
| url | https://pub.iapchem.org/ojs/index.php/JESE/article/view/2518 |
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