Anti-tarnish treatment of metal foil

Details Anti-tarnish treatment of metal foil Anti-tarnish treatment of metal foil

1989-12-22

1990-08-28

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 351, C25D 548, C25D 706

Patent

active

049522850

ABSTRACT:
A method of imparting tarnish and corrosion resistance to a copper or copper alloy foil, particularly wrought foil having one surface roughened by the application of nodules or dendrites. The foil is treated with an aqueous solution of chromic acid and sulfuric acid. The foil may then be rinsed in a basic solution having a pH greater than 8 and then dried.

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