Masters Theses

Abstract

"A cyclic voltammetric technique has been developed for quantitatively detecting the presence of active chemical species present in zinc sulfate electrolytes. The experimental apparatus consisted of a pyrex "H" cell, an Al cathode encased in a Teflon holder, a carbon anode and a mercurous sulfate reference electrode. Voltammograms were obtained from industrial, purified neutral leach solution (Cominco Ltd., Trail, B.C.) acidified to give a final concentration of 0.77 M Zn++, 1 M H2SO4. The polarization curves were then evaluated and used as a reference standard to compare with results obtained when various organic and inorganic additions were made. The principal single additions made were glue, Sb, Cu, Ag, and Ni, while mixtures of glue and Sb were also tried. The method was capable of detecting the presence of Sb in the concentration range of 5-10 ppb; Cu, Ag, and Ni in the 1-5 ppm range; and glue in the 5-10 ppm range.

Investigations on the deposit morphologies as affected by additions were made with the aid of a scanning electron microscope (SEM) and a non-dispersive X-ray spectrometer was used to locate impurities on the Al electrode surface. It was also possible to estimate the nature and concentration of the additives by the morphology changes which resulted"-- Abstract, p. ii

Advisor(s)

O'Keefe, T. J. (Thomas J.)

Committee Member(s)

James, William Joseph
Wolf, Robert V., 1929-1999

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

University of Missouri--Rolla

Publication Date

1974

Pagination

ix, 72 pages

Note about bibliography

Includes bibliographical references (pages 55-57)

Rights

© 1974 Bruce Alan Lamping, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 4040

Print OCLC #

5982977

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Metallurgy Commons

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