Effect of non-stationary current regimes on the morphology of silver electrodeposits

Dimitrov, Aleksandar and Paunovic, Perica and Popovski, Orce (2009) Effect of non-stationary current regimes on the morphology of silver electrodeposits. J. Serb. Chem. Soc., 74 (3). pp. 279-289.

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Abstract

Abstract: This work is concerned with the use of reverse current regimes in order to form small-grained and compact silver deposits during the electrorefining process. Several parameters were varied, i.e., i) anodic overpotential,ii) cathodic vs. anodic time ratio and iii) duration of the anodic pulse. After optimization of these parameters, phosphate ions were added and the electrolyte was stirred. The effects of a rise of the anodic overpotential on the grain sizes of the silver deposit and compactness were studied. Prolongation of the anodic time had a similar influence but with a decrease in current efficiency. An increase of the cathodic vs. anodic time ratio caused an enlargement of the grains and a decrease in the compactness of the deposit. Optimal morphological characteristics were obtained when 3-4 PO were added and the electrolyte was stirred. Keywords: silver; reverse current; electrorefining; nitrate solution; electrodeposition.

Item Type: Article
Subjects: Engineering and Technology > Nano-technology
Divisions: Military Academy
Depositing User: Orce Popovski
Date Deposited: 22 Jan 2013 08:44
Last Modified: 22 Jan 2013 08:44
URI: http://eprints.ugd.edu.mk/id/eprint/4755

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