Protective anode coatings

摘要

A coating system, for use in reducing air burn oxidation of a carbon anode of an aluminium electrolytic smelter, includes a pre-coat and a top coat which together enable protection of the anode when applied thereover. The pre-coat contains finely divided carbonaceous material dispersed in a solution of a suitable binder. The top coat contains finely divided particulate material, comprising at least one of alumina and cryolite, dispersed in a solution of a suitable binder.