Electrodeposition and Characterization of Zinc-Cobalt Alloy Coatings
Keywords:
zinc-cobalt alloy, co-deposition, SEM-EDX technique, EIS
Abstract
Electrodeposited alloys are important in industry due to their properties which are superior to those of single metal layer. Zinc-cobalt alloys were co-deposited on gold substrate. Composition of the layers was established using SEM-EDX techniques. The influence of working parameters against stoichiometric composition of alloys was studied in order to find optimal conditions to achieve a desired final product. Some discussion about reaction mechanism was opened based on EIS diagrams. Application properties important for coating systems used in the automotive industry, such as friction behavior, adhesion, and corrosion behavior, were investigated on coatings with varying cobalt content. The corrosion resistance of the Zn-Co alloy layers was found to be better than the one of pure zinc coatings.
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References
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[2]. Brenner, A. - Electrodeposition of Alloys, vols. I and II, Academic Press, New York, London, 1963.
[3]. Di Bari, G. - Electrodeposition of Nickel, Modern Electroplating, Fourth Edition, John Wiley and Sons, Inc. NewYork, 2000.
[4]. Firoiu, C. - Technology of electrochemical processes, E. D. P., Bucharest, 1983.
[5]. Grunwald, E., and co-workers - Treated of galvanictechnique, House of Book of Science, Cluj- Napoca, 2005.
[6]. Paunovic, M., Schlesinger, M., Weil, R. - Fundamental Considerations, Modern Electroplating, Fourth Edition, John Wiley and Sons, Inc. New-York, 2000.
[7]. Matlosz, M. - Competitive effects in the electrodeposition of iron-nickel alloys, J. Electrochem. Soc., 140, nr.8, 1993, p. 2272-2279.
[8]. Vallotton, P.M., Matlosz, M., Landolt, D. - Experimental invstigation of the thermal effect in lead electrodeposition onto resistive substrates, J. of Apllied Electrochemistry, 1993, 23, nr. 9, p. 927-932.
[9] Vasilache, V. - Thesis „Contributions to optimize the process of galvanic deposition of nickel and nickel alloys used in machine building”, Stefan cel Mare University of Suceava, 2008.
[10] Roventi, G., Bellezze, T., Fratesi, R. - Electrochemical study on the inhibitory effect of the underpotential deposition of zinc on Zn–Co alloy electrodeposition, Electrochimica Acta, 2006, 51, p. 2691-2697.
[11] Lodhi, Z.F., et. co. - A combined composition and morphology study of electrodeposited Zn-Co and Zn-Co-Fe alloy coatings, Surface and Coatings Technology, 2008, nr. 202, p. 2755-2764.
[12] Heydari, G., Heydarzedeh Sohi, M., Study of the corrosion behavior of zinc and Zn–Co alloy electrodeposits obtained from alkaline bath using direct current, Materials Chemistry and Physics, 2009, 117, p. 414-421.
[13]. J. Mahieu1, K. De Wit1, B. C. De Cooman1 and A. De Boeck - The properties of electrodeposited Zn-Co coatings, Journal of Materials Engineering and Performance, 2007, p. 561-570.
[14]. Pedro De Lima-Neto; Adriana N. Correia; Regilany P. Colares; Walney S. Araujo - Corrosion study of electrodeposited Zn and Zn-Co coatings in chloride medium, Journal of the Brazilian Chemical Society, 2007.
[15]. Vasilache V., Gutt S., Gutt G., Vasilache T, Sandu I., Sandu G.I. - Ditermination of the Dimension of Cristalline Grains of Thin Layers of Zinc-Nickel Alloys Electrochemically Deposited, Metalurgia International, vol.XIV(2009), nr.3, p. 49-53.
[16]. Vasilache, V., Gutt, Gh., Vasilache - T., Studies about electrochemical plating with Zinc-Nickel alloys-the influence of potential through stoichiometric composition, Revista de Chimie, Bucureşti, 2008, 59, nr.9, p. 878-885.
Published
2010-03-15
How to Cite
1.
VASILACHE V, GUTT S, SANDU I, GUTT G, VASILACHE T. Electrodeposition and Characterization of Zinc-Cobalt Alloy Coatings. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science [Internet]. 15Mar.2010 [cited 11Oct.2024];33(1):37-0. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/mms/article/view/3018
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