COMPARISON OF THE CHRONOAMPEROMETRIC RESPONSE AT INLAND AND RECESSED DISC MICROELECTRODES

Alan M. Bond, Darryl Luscombe, Keith D. Oldham, Cynthia G. Zoski

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Abstract

The macromorphological features of electrodeposited zinc that result from hydrodynamic flow conditions along a flat plate electrode in a channel flow cell have been investigated using acidic chloride solutions (0. 1-4. 0 M ZnCl//2 plus HCl) for the current density range 10-100 mA cm** minus **2. All the complex hydrodynamic characteristics of the reattaching flow and the presence of streamwise directed counter-rotating Taylor-Goertler vortices behind the critical region of the stagnation line and separation have been clearly outlined and marked by the macromorphology of three-dimensional relief imprints. The macromorphological features of the deposit depend mainly on the flow rate, electric-field strength, deposition time, ionic zinc content and electrolyte composition. The macromorphological imprints of electrodeposited zinc within a certain current density range could be employed for both the instantaneous and the cumulative (time sequence of photoimprints) electrochemical visualization method.

Original languageEnglish
Pages (from-to)35-62
Number of pages28
JournalJournal of electroanalytical chemistry and interfacial electrochemistry
Volume249
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 1988
Externally publishedYes

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