Protective material made of corundum crystals

Details Protective material made of corundum crystals Protective material made of corundum crystals

1976-05-18

1977-09-20

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

C25C 306

Patent

active

040495116

ABSTRACT:
A molten salt charge as used in the electrolysis of aluminum contains aluminum oxide in excess of the eutectic composition and is cooled at a surface colder than the melt in such a way that the aluminum oxide precipitates onto this surface in the form of corundum crystals. Such a layer of crystals provides chemical and electrical insulation to the cooling surface under the corrosive conditions produced by the charge.

REFERENCES:
patent: 1531528 (1925-03-01), Tilson
patent: 3960678 (1976-06-01), Alder

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