Voltammetric Analysis of Phase Composition of Zn-Ni Alloy Thin Films Electrodeposited from Weak Alkaline Polyligand Electrolyte

Authors A. Maizelis, B. Bairachny
Affiliations

National Technical University «Kharkiv Polytechnic Institute», 2, Kyrpychov Str., 61002 Kharkiv, Ukraine

Е-mail [email protected]
Issue Volume 9, Year 2017, Number 5
Dates Received 14 July 2017; published online 16 October 2017
Citation A. Maizelis, B. Bairachny, J. Nano- Electron. Phys. 9 No 5, 05010 (2017)
DOI 10.21272/jnep.9(5).05010
PACS Number(s) 82.80.Fk, 81.15.Pq, 81.05.Bx, 82.45.Mp
Keywords Alloy (25) , Zn-Ni, Phase composition (3) , Anodic lineal stripping voltammetry.
Annotation The phase composition of Zn-Ni alloy films electrodeposited from a slightly alkaline polyligand electrolyte was analyzed by anodic voltammetry method. The mechanism of films anodic dissolution in alkaline ammonia-glycinate solution not containing metal ions is proposed. The main peaks correspond to the zinc dissolution from -phase and from -phase of the initial film and the nickel-enriched phase formed during the film dissolution. The nickel content in the nickel-enriched phase is determined, as well as nickel and -phase content in the original film, depending on the ratio of metal ion concentrations in the electrolyte at various ratios of glycine and ammonia concentration. It is shown that films in a wide range of these ratios ([Ni2+]:[Zn2+]  (2-5):1 and [Gly-]:[NH3(NH4+)]  (2-9):5) contain mainly -phase with nickel content in the range of 15.8-18.2%.

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