Anti-tarnish treatment of metal foil

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

1990-03-06

1992-11-17

Beck, Shrive

Coating processes

Immersion or partial immersion

Metal base

148258, 148264, 148269, 148282, C23C 2600

Patent

active

051642352

ABSTRACT:
A process for imparting tarnish resistance to copper and copper alloy materials, particularly copper foil. The material is first treated with an acidic chromium-containing solution to deposit chromium ions on said foil. Thereafter the material is treated with a basic zinc ion containing solution to deposit zinc ions thereon. Finally, the material is rinsed in distilled water to remove any residual basic solution.

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