Date of Award


Degree Type

Bachelors Thesis

Degree Name

Bachelor of Science in Metallurgical Engineering

First Advisor

Doctor A. E. Koenig

Second Advisor

Doctor C. L. Wilson

Third Advisor

Professor J. U. MacEwan


There are many elements which are detrimental to the current efficiency in the electrolysis of zinc sulphate solution. Fortunately the majority of these elements are easily removed in the purification process and cause no further trouble. The elements that are likely to cause trouble in ordinary plant operations are antimony, arsenic, cobalt, nickel, manganese and germanium. The following tests were made to determine the mutual effect on the current efficiency when several of the impurities were present in the electrolyte.