Sliding wear behaviour of zinc–cobalt alloy electrodeposits

Electrodeposition of zinc and composite zinc–yttria stabilized zirconia coatings

“…In particular, electrodeposition is one of the most commonly practiced industrial techniques for the fabrication of zinc coatings (Panagopoulos et al, 2006;Schlesinger and Paunovic, 2000;Zuniga et al, 2004), routinely producing large quantities of high quality pure Zn coatings for a variety of applications. In recent years, significant research effort has focused on the electrodeposition of zinc coatings from non-toxic acidic electrolytes, where various electrolyte additives have been introduced to improve the deposit properties and morphology (Alfantazi and Dreisinger, 2001;Baik and Fray, 2001;Raeissi et al, 2003;Yim et al, 1995;Youssef et al, 2004a).…”

Effect of aromatic aldehydes on the electrodeposition of ZnCo alloy from cyanide-free alkaline-gluconate electrolytes

“…It is interesting to note that, when the scan is reversed to positive potentials, the oxidation peaks that appear are modified because of different alloys being formed during the cathodic scan. New oxidation peaks (IIIa and IVa) appear because of compositional changes of the deposit corresponding to the formation of different phases of ZnCo [33] during the cathodic scan. Such peaks associated with ZnCo phases are well known with acidic electrolytes [34][35][36][37].…”

“…The profile of cobalt content within the deposit suggests that several steps take place during ZnCo electrodeposition, and indeed different mechanisms may prevail as the interface changes and the film grows. Different ZnCo alloy phases can be formed [33], such as c2(91-92.8% Zn), c1(87.4-88.6% Zn), c(75.2-85.4% Zn), b(53-53.8% Zn), and the g-phase (%Co \3%). The cobalt level determined in the potentiostatically deposited ZnCo alloy films corresponds most closely to the hexagonal-close-packed (hcp) g-phase (%Co \3%).…”

“…The stripping peaks of voltammograms depicted in Figs. 2 and 3 may correspond to variations of the relative amounts of zinc and cobalt in the g-ZnCo [33] alloy as well as some cobalt-rich phase formed at the beginning of the alloy deposition on the steel surface.…”

Optimization of deposition conditions for development of high corrosion resistant Zn–Fe multilayer coatings

“…Electroplating is one of the cheapest approaches to combat it. In this regard, the development of Zn-M (where M = Ni, Co, Fe and less commonly Mn) alloy coatings is the most volume consuming, due to its commercial interest (Short et al, 1984;Roventi and Fratesi, 2000;Fei and Wilcox, 2005;Heydarzadeh Sohi and Jalali, 2003;Panagopoulos et al, 2005). Amongst them, Zn-Ni alloy has been studied extensively and put into practical use in the mass production of steel sheets for automobile bodies, and also for small components such as nuts and bolts (Wilcox and Gabe, 1993;Roventi and Fratesi, 2000).…”