Conversion composition and process

Details Conversion composition and process Conversion composition and process

1990-02-16

1991-01-08

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 40, 204 561, 204DIG9, C25D 1138

Patent

active

049832620

ABSTRACT:
The production of uniformly blackened nickel deposits for decorative or functional purposes can be achieved by depositing nickel from an electroless nickel plate composition or electrolytically followed by forming a conversion coating on the electroless nickel deposit in a chromate bath which includes nitrate ions.

REFERENCES:
patent: 3876435 (1975-04-01), Dollman
patent: 3982951 (1976-09-01), Palagos
patent: 3998601 (1976-12-01), Yates et al.
patent: 4003760 (1977-01-01), Labenski et al.
patent: 4137132 (1979-01-01), Ward et al.
patent: 4591416 (1986-05-01), Kamitani et al.
Metal Finishing Guidebook and Directory for 1978, Metals and Plastics Publications, Inc., Hackensack, N.J.; pp. 555-571.

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