Preparation of ZnNi alloy films by electrodeposition. (1st November 2013)

• Record Type: Journal Article
• Authors: Yu, Y D; Zhao, X X; Li, M G; Wei, G Y; Sun, L X; Fu, Y
• Is Part Of: Surface engineering. Volume 29:Number 10(2013)
• Page Start: 743
• Page End: 748
• Publication Date: 2013-11-01
• Subjects: Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1179/1743294413Y.0000000159
• Languages: English
• ISSNs: 0267-0844

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <p>ZnNi alloy films were electrodeposited from a kind of acid solution on a steel substrate. Influences of various temperatures on deposition rate, component, current density, anticorrosion performance and surface morphology were investigated. With the increase in temperatures, deposition rate increased and then declined gradually. Maximum deposition rate (85 mg h⁻¹) was achieved when the temperature was equal to 313 K. Approximately 90% current efficiency was obtained at the temperature of 313 K. When the temperature was &gt;313 K, drastic side reactions consumed certain part of total current, which would result in decrease in current efficiency. According to polarisation curves, ZnNi films with 12% nickel possessed the most positive corrosion potential (−0·81 V) and optimal anticorrosion performance. ZnNi alloy film obtained at the temperature of 293 K showed small nodular structures with even and smooth surface. With the increase in temperatures, rougher surface and bulk structures could be detected.</p> </abstract>