Contemporary Materials I−1 (2010)
Contemporary Materials, I–1 (2010) Page 87 - 93
Corrosion stability of ElectrochemicalLy depositED Zn-Mn ALLOY coatings
M. V. Tomić1, M. M. Bučko2, M. G. Pavlović1, J. B. Bajat2
Abstract
Zinc alloy coatings electrochemically deposited on steel from electrolytes with different components differ in their composition, homogeneity, porosity, structure and other characteristics that affect their corrosion resistance. Manganese is characterized by a very negative electrochemical potential and very high strength, prompting many researchers to study Zn-Mn alloys for the anti-corrosion purposes in the industry, especially automotive. In this work it was examined the influence of the type of the electrolyte deposition on the current efficiency during electrodeposition of Zn-Mn alloys. Zn-Mn alloys were deposited on steel from chloride, sulphate and pyrophosphate plating baths at different current densities. We have examined the influence of deposition current density on the current efficiency during electrodeposition, appearance of alloy coatings, as well as their corrosion stability. It was shown that Zn-Mn alloys with the best corrosion properties, among all examined ones, were obtained from chloride plating bath at 2 A dm-2.
Keywords: Electrodeposition of alloys, Zn-Mn alloys, morphology, corrosion properties.
References
[9] D. Sylla, C. Savall, M. Gadouleau, C. Rebere, J. Creus, Ph. Refait, Surf. Coat. Technol. 200 (2005) 2137.
[12] B. Bozzini, E. Griskonis, A. Fanigliulo, A. Sulcius, Surf. Coat. Technol. 154 (2002) 294.