Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Utilizing fused bath
Patent
1991-12-30
1993-07-13
Valentine, Donald R.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Utilizing fused bath
204 67, C25D 904, C25C 306
Patent
active
052270459
ABSTRACT:
This invention relates to a process of electrowinning molten aluminum from alumina dissolved in molten fluoride salts which is essentially cryolite. More specifically the process relates to the treatment of aluminum reduction cell drained solid cathode surfaces to protect them while they are wetted by molten aluminum metal. This process produces aluminum wetted protective coatings composed of titanium diboride and titanium carbide and other refractory metal borides and carbides on top of a carbon-titanium diboride materials layer on the cathode surfaces from supersaturated dissolved elements in electrowon aluminum. The resulting protective coating is resistant to erosion, chemical attack, and penetration by molten aluminum metal, sodium, and cryolite electrolyte contained in that cell.
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Klein David I.
Rosenberg Morton J.
Valentine Donald R.
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