Additive-free, fast precipitating palladium electrolyte bath and

Details Additive-free, fast precipitating palladium electrolyte bath and Additive-free, fast precipitating palladium electrolyte bath and

1982-11-19

1984-05-29

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 350

Patent

active

044513364

ABSTRACT:
An additive-free, fast-precipitating electrolyte bath for precipitating lustrous, crack-free palladium layers on workpieces is formulated, by successively adding to distilled water heated up to about 90.degree. C., phosphoric acid, sufficient ammonia to neutralize the phosphoric acid and palladium, in the form of palladium chloride. After dissolution of the palladium salt, the operating pH value is adjusted by additions of ammonia or phosphoric acid as required and the volume of the bath can be increased as desired by additions of further distilled water. The bath can be filtered prior to use.

REFERENCES:
patent: 3925170 (1975-12-01), Skomoroski et al.
patent: 4242180 (1980-12-01), Heppner et al.

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