Corrosion resistant metallic plates particularly useful as suppo

Details Corrosion resistant metallic plates particularly useful as suppo Corrosion resistant metallic plates particularly useful as suppo

1977-12-09

1979-09-04

Edmundson, F. C.

Chemistry: electrical and wave energy

Processes and products

204 58, 204206, C25D 1106, C25D 1700

Patent

active

041667778

ABSTRACT:
A process for electrolytically forming on a metallic element a protective layer or film in an electrolyte consisting of an aqueous solution of preferably sodium silicate or alternately of other salts rendering the electrolyte substantially basic, the metallic element constituting the anode in the process. The processed metallic element has particular usefulness as a support member for photolithographic printing plate, the electrolytically formed film acting as a barrier layer preventing deterioration of the light sensitive diazo resin, or the like, utilized as a photosensitive coating on lithographic plates.

REFERENCES:
patent: 2512563 (1950-06-01), DeLong
patent: 2578400 (1951-12-01), Cohn
patent: 2780591 (1957-02-01), Frey
patent: 3330743 (1967-07-01), Jestl et al.
patent: 3632486 (1972-01-01), Herrmann et al.

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