Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy
The electrochemical behavior of Mg2+ and Al3+ in LiCl-KCl (mass 4: 1) melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry, square wave voltammetry and chronopotentiometry. The results showed that the reductions of Mg2+ and Al3+ were reversible processes controlled by the...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-03-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956720302115 |
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| author | Shaolong Li Yusi Che Chenyao Li Yongchun Shu Jilin He Bin Yang Jianxun Song |
| author_facet | Shaolong Li Yusi Che Chenyao Li Yongchun Shu Jilin He Bin Yang Jianxun Song |
| author_sort | Shaolong Li |
| collection | DOAJ |
| description | The electrochemical behavior of Mg2+ and Al3+ in LiCl-KCl (mass 4: 1) melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry, square wave voltammetry and chronopotentiometry. The results showed that the reductions of Mg2+ and Al3+ were reversible processes controlled by the rate of the mass transfer. When Mg2+ and Al3+ coexisted in LiCl-KCl melt, they had no significant effect on the reduction potential of each other. The equilibrium potentials of Mg2+/Mg and Al3+/Al were obtained by open circuit potential method. Their apparent standard potentials were also calculated in this system and the values were −2.52 V vs Cl2/Cl−, −1.66 V vs Cl2/Cl−, respectively. Correspondingly, the apparent Gibbs free energies of Mg2+/Mg and Al3+/Al were −485.71 kJ/mol, −480.78 kJ/mol. Finally, potentiostatic electrolysis was performed on a Mo electrode in LiCl-KCl-MgCl2-AlCl3 (the mass ratio of MgCl2 to AlCl3 was 10:1) melt at different potentials. The components of the deposits were characterized by scanning electron microscope and energy dispersive spectroscopy. The study revealed that the content of Al in the deposit decreased as the overpotential increased and Al tended to segregate at the grain boundaries. |
| first_indexed | 2024-04-24T08:29:14Z |
| format | Article |
| id | doaj.art-9162d52f55bf4151aab2351aa07b7c08 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:29:14Z |
| publishDate | 2022-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-9162d52f55bf4151aab2351aa07b7c082024-04-16T20:45:57ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672022-03-01103721729Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloyShaolong Li0Yusi Che1Chenyao Li2Yongchun Shu3Jilin He4Bin Yang5Jianxun Song6Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, China; School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, China; National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology, 650093 Kunming, Yunnan, ChinaHenan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, 450001 Zhengzhou, China; Corresponding author.The electrochemical behavior of Mg2+ and Al3+ in LiCl-KCl (mass 4: 1) melt at 973 K was studied on a Mo electrode systematically by cyclic voltammetry, square wave voltammetry and chronopotentiometry. The results showed that the reductions of Mg2+ and Al3+ were reversible processes controlled by the rate of the mass transfer. When Mg2+ and Al3+ coexisted in LiCl-KCl melt, they had no significant effect on the reduction potential of each other. The equilibrium potentials of Mg2+/Mg and Al3+/Al were obtained by open circuit potential method. Their apparent standard potentials were also calculated in this system and the values were −2.52 V vs Cl2/Cl−, −1.66 V vs Cl2/Cl−, respectively. Correspondingly, the apparent Gibbs free energies of Mg2+/Mg and Al3+/Al were −485.71 kJ/mol, −480.78 kJ/mol. Finally, potentiostatic electrolysis was performed on a Mo electrode in LiCl-KCl-MgCl2-AlCl3 (the mass ratio of MgCl2 to AlCl3 was 10:1) melt at different potentials. The components of the deposits were characterized by scanning electron microscope and energy dispersive spectroscopy. The study revealed that the content of Al in the deposit decreased as the overpotential increased and Al tended to segregate at the grain boundaries.http://www.sciencedirect.com/science/article/pii/S2213956720302115Electrochemical behaviorThermodynamic propertiesMg-Al alloyElectrolysis |
| spellingShingle | Shaolong Li Yusi Che Chenyao Li Yongchun Shu Jilin He Bin Yang Jianxun Song Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy Journal of Magnesium and Alloys Electrochemical behavior Thermodynamic properties Mg-Al alloy Electrolysis |
| title | Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy |
| title_full | Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy |
| title_fullStr | Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy |
| title_full_unstemmed | Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy |
| title_short | Study on the electrochemical behavior of Mg and Al ions in LiCl-KCl melt and preparation of Mg-Al alloy |
| title_sort | study on the electrochemical behavior of mg and al ions in licl kcl melt and preparation of mg al alloy |
| topic | Electrochemical behavior Thermodynamic properties Mg-Al alloy Electrolysis |
| url | http://www.sciencedirect.com/science/article/pii/S2213956720302115 |
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