Process for preparing a part for color anodization

Details Process for preparing a part for color anodization Process for preparing a part for color anodization

1985-11-08

1987-12-15

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 386, 204 387, 204 561, C23C 2800

Patent

active

047131500

ABSTRACT:
An article of manufacture having a metallic surface consisting of brass or stainless steel is overcoated with a first layer of nickel and a second layer of elemental niobium. The article may thereafter be color anodized in a solution of ammonium sulfate without the need for a hydrofluoric acid etch to produce a highly attractive and colorful ornamental surface finish. After anodization, the articles may be coated with clear epoxy or a sputter deposited transparent ceramic coating for added wear resistance.

REFERENCES:
patent: 3493475 (1970-02-01), Neugebauer et al.
patent: 3784452 (1974-01-01), Martens et al.
patent: 3806430 (1974-04-01), Laibowitz et al.

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