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| ELECTRODEPOSITION OF ALUMINUM FROM\par AlCl3-[bmim]Cl IONIC LIQUIDS |
| MEI Tianqing, YU Guangnan, HE Limin, PEI Yuru |
| College of Materials Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016 |
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Abstract Dense, well adherent and silvery bright aluminum coating was obtained on iron substrates from 2AlCl3/[bmim]Cl ionic liquids contained of a small amount of toluene at various cathode current densities. Cyclic voltammogram show that the deposition is obtained owing to the reduction of Al2Cl7 - which has a peak value of -0.34 V; The maximal current efficiency of 97% is obtained when current density is 20 mA/cm2. The thickness of aluminum coating increases with prolongation of plating time and the increase of cathode current density when it is less than 35 mA/cm2. The results investigated by SEM and DES show that the aluminum electrodeposits obtained on Fe electrodes were dense, continuous and higher purity at 45±2℃ temperature. When the current density is 20 mA/cm2, the aluminum is deposited in a flaky form, with the increasing of the current density, the form of the aluminum layer changes from flake to graininess, and at the same time, the size of the grains decreases.
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Received: 01 July 2010
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Corresponding Authors:
MEI Tianqing
E-mail: meitq@nuaa.edu.cn
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| [1] Deng Y Q. Ionic liquid-property preparations and application. [M]. Beijing: China Petrochemical Press, 2006 (邓友全. 离子液体-性质、制备与应用 [M]. 北京: 中国石化出版社, 2006)[2] Zhao Y G, Vander N T J. Electrodeposition of aluminum from room temperature AlCl3-TMPAC molten salts [J]. Electrochem. Acta, 1997,42(11): 1639-1643[3] Liao Q, Pitner W R, Gemma S, et al. Electrodeposition of aluminum from the aluminum chloride-l-methyl-3-ethylimidazolium chloride room temperature molten salt benzene [J]. J. Electrochem.Soc., 1997, 144(3): 936-942[4] Reddy R G. Emerging technologies in extraction and processing metals [J]. Metall. Mater.Trans. 2003, 34B(2): 137-152[5] Yue G, Lu X, Zhu Y, et al. Surface morphology, crystal structure and orientation of aluminum coatings electrodeposited on mild steel in ionic liquid [J].Chem. Eng. J., 2009, 147(1): 79-86[6] Yue G, Zhang S, Zhu Y, et al. A promising method for electrodepositionof aluminum on stainless steel in ionic liquid [J]. AIChE J., 2009, 55(3): 783-796[7] Gao. L, Wang L, Qi T, et al. Electrodeposition of aluminum from AlCl3/Et3NHCl ionic liquids [J]. Acta Phys. -Chim. Sin.,2008, 24(6): 939-944[8] Jiang T, Chollier B M J, Dube G.Electrodeposition of aluminum from ionic liquids: Part Ⅰ-electrodeposition and surface morphology of aluminum from aluminum chloride ([EMIM]Cl) ionic liquid [J]. Surf. Coat. Technol.,2006, 201: l-9[9] Tetsuya T, Toshiyuki N, Yasuhiko I. Nucleation and surface morphology of aluminum-lanthanum alloy electrodeposited in a LaCl3-saturated AlCl3-EtMeImCl room temperature molten salt [J]. Electrochem. Acta, 2002,47(17): 2817-2822[10] Feng Q Y, Ding Z M, Jia L S, et al. Low temperature electroplating aluminum in molten salt [J]. Mater. Prot., 2004, 37(4): 1-3 (冯秋元,丁志敏, 贾利山等. 低温熔融盐电镀铝的研究 [J]. 材料保护, 2004, 37(4): 1-3) |
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