Stripping of Zn–Ni alloys deposited in acetate-chloride electrolyte under potentiodynamic and galvanostatic conditions

• Published in: Surface & coatings technology Vol. 192; no. 2; pp. 299 - 304
• Main Authors: Petrauskas, A., Grincevičienė, L., Česūnienė, A., Matulionis, E.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 21.03.2005; Elsevier
• Subjects: Acetate-chloride electrolyte; Applied sciences; Cross-disciplinary physics: materials science; rheology; Electrodeposition; Exact sciences and technology; Materials science; Metallic coatings; Metals. Metallurgy; Other topics in materials science; Physics; Production techniques; Stripping; Surface treatment; Zn–Ni coatings; Stripping; Zn–Ni coatings; Electrodeposition; Acetate-chloride electrolyte; Zinc base alloys; Metal coating; Nickel alloys; Chlorides; Surface treatments; Acetates
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2004.08.191

Variations in the phase composition of Zn–Ni alloy electrodeposited in acetate-chloride electrolyte have been studied as a function of ZnCl 2 concentration in electrolyte and deposition conditions: the cathodic current density ( i c), the cathodic potential ( E c) and deposition temperature ( t, °C), by using the potentiodynamic stripping method. It has been determined that the quantity of Ni in galvanostatically deposited coatings decreases more significantly at 20 °C as compared with that at 50 °C with an increase in ZnCl 2, whereas the cathodic current efficiency (CE) passes through a minimum in both cases. It has been determined that the quantity of η-phase in the Zn–Ni alloy decreases with an increase either in i c or E c. The data obtained by using the partial cycling method suggest that, in the potential range of i a peak D, not only does Ni dissolve, but the dissolution of Zn–Ni alloy also takes place.