Chemistry: electrical and wave energy – Processes and products
Patent
1980-12-22
1984-03-20
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 28, 204 38B, 204 40, 204 56R, C25D 1138
Patent
active
044379447
ABSTRACT:
Thin metal plate is cleaned and electrolytically pickled in an acid solution. A zinc layer is electrodeposited on one face of the plate, after which a chrome-chromic oxide coating is deposited on both faces of the plate from a sulphuric acid solution containing compounds of trivalent and hexavalent chrome. The plate is then subjected to a drying-oxidating treatment in air. The plate may be steel having a thickness between 0.1 and 2 mm. The plate may be surface treated by phosphating, and then painted. The chrome-chromic oxide coating may have a thickness between 0.05 and 5 .mu.m, and the zinc coating a thickness between 1 and 30 .mu.m.
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F. A. Lowenheim, Electroplating, McGraw-Hill Book Co., New York, 1978, pp. 86-87, 442-446, 449-451.
Bruno Roberto
Memmi Massimo
Kaplan G. L.
Leader William
Levine Alan H.
Zincroksid S.p.A.
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