Chemistry: electrical and wave energy – Processes and products
Patent
1983-03-31
1984-02-14
Douglas, Winston A.
Chemistry: electrical and wave energy
Processes and products
204 42, C25D 1122
Patent
active
044314892
ABSTRACT:
The invention relates to an electrolytic method of coloring anodized aluminum workpieces in an acidic aqueous electrolyte containing nickel sulfamate in amounts from 50 to 150 grams per liter (expressed as nickel) at temperatures above 35.degree. C. The coloring voltage ranges from 5 to 40 volts (AC).
REFERENCES:
patent: 3616309 (1971-10-01), Asada
patent: 3788956 (1974-01-01), Patrie et al.
patent: 3929612 (1975-12-01), Yanagida et al.
patent: 3963591 (1976-06-01), Zweifel et al.
patent: 3977948 (1976-08-01), Martinez
patent: 4115212 (1978-09-01), Patrie et al.
patent: 4251330 (1981-02-01), Sheasby et al.
Baker Bernard R.
Bolmer Perce W.
Smith Richard L.
Douglas Winston A.
Kaiser Aluminum & Chemical Corporation
Leader William
Lynch Edward J.
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