Cathode protection

Details Cathode protection Cathode protection

1993-03-09

1994-10-04

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

204147, C25B 306

Patent

active

053523385

ABSTRACT:
A method of operating an aluminum smelting cell during the start-up phase of the cell is described. The method includes forming a layer of boron oxide on the exposed surface of the cathode of the cell, forming a layer of aluminum on the boron oxide layer, and starting the cell. This melts the boron oxide layer to form a barrier impervious to oxygen at a temperature from about 400.degree. C. to about 650.degree. C., and the aluminum layer is melted to form a barrier to oxygen at temperature above about 600.degree. C. to about 1000.degree. C. to reduce the development of oxidation products.

REFERENCES:
patent: 4560448 (1985-12-01), Sane et al.
patent: 5028301 (1991-07-01), Townsend

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