Alcan International Limited

Joseph K Walker

Adam J Gesing

Douglas J Wheeler

Ernest W Dewing

Peter Alexander Wales

David N Mitchell

Douglas N Reesor

Donald L De Respiris

In an aluminium reduction cell including a cell lining and embedded therein at least one cathode current collector including a high temperature section comprising an electrically conducting refractory material such as titanium diboride, generally in conjunction with molten aluminium metal, corrosion is a problem. The invention provides a substance to protect the collector section. The substance may be a liquid impermeable layer e.g. particulate material impregnated with a molten fluoride-or chloride-containing salt mixture; for a getter such as particulate aluminium to react chemically with gaseous corrosive species. Combinations of these substances may be used, optionally in conjunction with a solid layer such as an alumina or aluminium metal tube.

Aluminium reduction cell

Growing community of inventors

Beechwood, OH, United States of America

Joseph K Walker