Back
 ACES  Vol.1 No.2 , April 2011
Preparation of Ni-Co Alloy Foils by Electrodeposition
Yu-Yang Yang, Bin Deng
Abstract: Electrodeposition of Ni-Co alloy foils on titanium substrate was performed in an acid chloride- sulphate bath. The influences of electrodeposition parameters such as current density, temperature, pH value, cobalt sulphate and saccharin concentration on composition and current efficiency were investigated in detail. The morphology and the microstructure of deposits were analyzed by SEM and XRD, respectively. The results indicated that the optimum parameters were current density 3-4 A/dm2, pH 2-3, temperature 40-50?C, cobalt sulphate 20 g/l and saccharin 2-3 g/l. Chemical analysis of the deposits by EDS revealed anomalous Ni-Co codeposition occured in this system. The SEM showed that hydroxide particles were not present on the surface and that fine-grain, smooth and compact Ni-Co alloy deposits were obtained. The crystallographic structures of Ni-Co alloy foils were the fcc Ni solid solution. The Ni-Co alloy foils with Co content 17.3-37.2 wt% and thickness of 20-45 μm were bright with low residual stress and super toughness.
Keywords: Nickel-Cobalt, Alloy Foil, Electrodeposition
Cite this paper: nullY. Yang and B. Deng, "Preparation of Ni-Co Alloy Foils by Electrodeposition," Advances in Chemical Engineering and Science, Vol. 1 No. 2, 2011, pp. 27-32. doi: 10.4236/aces.2011.12005.
References

[1]   C. A. Moina and M. Vazdar, “Electrodeposition of Nano- Sized Nuclei of Magnetic Co-Ni Alloys onto n-Si (100),” Electrochemistry Communications, Vol. 3, 2001, pp. 159- 163. doi:10.1016/S1388-2481(01)00114-X

[2]   M. Srivastava, V. E. Selvi, V. K. W. Grips and K. S. Rajam, “Corrosion Resistance and Microstructure of Electrodeposited Nickel–Cobalt Alloy Coatings,” Surface & Coatings Technology, Vol. 201, 2006, pp. 3051-3060. doi:10.1016/j.surfcoat.2006.06.017

[3]   L. Peter, J. Padar, E. Toth-Kadar, A. Cziraki, P. Soki, L. Pogany and I. Bakonyi, “Electrodeposition of Co–Ni–Cu/ Cu Multilayers 1. Composition, Structure and Magnetotransport Properties,” Electrochimica Acta, Vol. 52, 2007, pp. 3813-3821. doi:10.1016/j.electacta.2006.10.058

[4]   A. N. Correia and S. A. S. Machado, “Electrodeposition and Characterisation of Thin Layers of Ni-Co Alloys Obtained from Dilute Chloride Baths,” Electrochimica Acta, Vol. 45, 2000, pp. 1733-1740. doi:10.1016/S0013-4686(99)00405-3

[5]   D. Golodnitsky, Y. Rosenberg and A. Ulus, “The Role of Anion Additives in the Electrodeposition of Nickel-/Cobalt Alloys from Sulfamate Electrolyte,” Electrochimica Acta, Vol. 47, 2002, pp. 2707-2714. doi:10.1016/S0013-4686(02)00135-4

[6]   A. Bai and C.-C. Hu, “Iron–Cobalt and Iron–Cobalt– Nickel Nanowires Deposited by Means of Cyclic Voltammetry and Pulse-Reverse Electroplating,” Electroche- mistry Communications, Vol. 5, 2003, pp. 78-82. doi:10.1016/S1388-2481(02)00540-4

[7]   A. Bai and C.-C. Hu, “Composition Controlling of Co–Ni and Fe–Co Alloys Using Pulse-Reverse Electroplating through Means of Experimental Strategies,” Electroch- imica Acta, Vol. 50, 2005, pp. 1335-1345. doi:10.1016/j.electacta.2004.07.055

[8]   E. Gomez, S. Pane and E. Valles, “Electrodeposition of Co–Ni and Co–Ni–Cu Systems in Sulphate–Citrate Medium,” Electrochimica Acta, Vol. 51, 2005, pp. 146-153. doi:10.1016/j.electacta.2005.04.010

[9]   B. Chi, J. Li, X. Yang, Y. Gong and N. Wang, “Deposition of Ni–Co by Cyclic Voltammetry Method and Its Electrocatalytic Properties for Oxygen Evolution Reaction,” International Journal of Hydrogen Energy, Vol. 30, 2005, pp. 29-34. doi:10.1016/j.ijhydene.2004.03.032

[10]   B. Tury, M. Lakatos-Varsanyi and S. Roya, “Ni–Co Alloys Plated by Pulse Currents,” Surface & Coatings Technology, Vol. 200, 2006, pp. 6713-6717. doi:10.1016/j.surfcoat.2005.10.008

[11]   W. E. G. Hansal, B. Tury, M. Halmdienst, M. L. Varsanyi and W. Kautek, “Pulse Reverse Plating of Ni–Co Alloys: Deposition Kinetics of Watts, Sulfamate and Chloride Electrolytes,” Electrochimica Acta, Vol. 52, 2006, pp. 1145-1151. doi:10.1016/j.electacta.2006.07.012

[12]   V. D. Jovic, B. M. Jovic and M. G. Pavlovic, “Electrodeposition of Ni, Co and Ni–Co Alloy Powders,” Electrochimica Acta, Vol. 51, 2006, pp. 5468-5477. doi:10.1016/j.electacta.2006.02.022

[13]   V. D. Jovic, B. M. Jovic, V. Maksimovic and M. G. Pavlovic, “Electrodeposition and Morphology of Ni, Co and Ni–Co Alloy Powders Part II. Ammonium Chloride Supporting Electrolyte,” Electrochimica Acta, Vol. 52, 2007, pp. 4254-4263. doi:10.1016/j.electacta.2006.12.003

[14]   A. Dolati, M. Sababi, E. Nouri and M. Ghorbani, “A Study on the Kinetic of the Electrodeposited Co–Ni Alloy Thin Films in Sulfate Solution,” Materials Chemistry and Physics, Vol. 102, 2007, pp. 118-124. doi:10.1016/j.matchemphys.2006.07.009

[15]   R. Orinakova, A. Oriňák, G. Vering, I. Talian, R. M. Smith and H. F. Arlinghaus, “Influence of pH on the Electrolytic Deposition of Ni–Co Films,” Thin Solid Films, Vol. 516, 2008, pp. 3045-3050. doi:10.1016/j.tsf.2007.12.081

 
 
Top