Ppg Industries, Inc.

Lois A Dahlberg

William W Carlin

Disclosed is an electrolytic cell having an electrode pair of interleaved anode and cathode fingers with a synthetic separator, i.e., a permionic membrane or a microporous diaphragm, therebetween. At least one of the two electrodes of the electrode pair has a continuous electrodic surface with fluid impermeable members at opposite ends of the continuous electrodic surface and a synthetic separator sealably mounted at the fluid impermeable surfaces and extending over the face of the electrodic surface between the members of the electrode pair. The fluid impermeable members at the opposite ends of the continuous electrodic surface may either be the cell body itself or liquid impermeable elements, such as compressive masks, at opposite edges of the finger-like electrode sheets, maintaining the separator against the finger-like electrode sheet, and providing an electrolyte-tight seal therebetween.

Electrolytic cell

Disclosed is a method of cleaning foraminous metal bodies, for example, cathodes, of corrosion products and asbestos. The method is carried out by contacting the body with an aqueous cleaning solution containing an oxidation inhibitor, hydrochloric acid, and a source of hydrofluoric acid. Also disclosed is a method of electrolytically treating the cleaned metal surface with an organic hydroxy phosphonic acid.

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Corpus Christi, TX, United States of America

Lois A Dahlberg