Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1989-12-27
1990-09-04
Tufariello, T. M.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C25D 1700
Patent
active
049542354
ABSTRACT:
Disclosed herein suspension electroplating of fine particles with metal. An electroplating operatively equipped with a cathode and anode is charged with a a metallic ion-containing electrolyte and particles to be electroplated. The particles have a size of from 0.1 to 10 .mu.m. At least a part of the surface of each particle is conductive. Such a stationary circulating flow of a suspension of the particles in the electrolyte is formed in the bath that the particles are maintained in the suspended condition; the suspension is circulated substantially without coming in contact with the anode; the particles may have a chance of colliding with substantially all surface areas of the working surface of the cathode, and are repeatedly brought in collision with the cathode at a velocity with a normal component of from 0.6 to 6.0 m/min; and a particle concentration of the suspension at the time of collision is from 30 to 55% by volume. When such a stationary flow has been formed, a current for electroplating is caused to pass, whereupon deposition of metal on the particles proceeds without deposition of the particles and metal on the cathode.
REFERENCES:
patent: 3830711 (1974-08-01), Kedward
Fujii Takahiro
Kojima Youichi
Takatsu Kiyoshi
Takeshima Eiki
Nisshin Steel Co. Ltd.
Tufariello T. M.
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