| 摘要 |
625,990. Electroplating. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 2, 1947, No. 9010. Convention date, Sept. 29, 1945. [Class 41] A process of electrodepositing metal on a base member from an electrolyte comprises passing an electric current through the electrolyte with the base member as cathode, then discharging through the electrolyte a condenser charged with a potential opposite to and higher than the cathodic current potential, and repeating the cycle of operations until a desired thickness of metal has been electrodeposited on the base member. The condenser prior to discharge is preferably charged to a potential above 100 volts. As shown, a base member 20 and an electrode 24 in a tank 10 containing electrolyte 14, are suspended by hangers from conductors 16, 22, the conductor 16 being connected alternately by a switch 32 to a direct current source 26, and to a circuit containing a source 40 of current at high voltage and a condenser 34. A high resistance 42 and a variable resistance 44 are provided in the condenser circuit. The invention may be used in electrodepositing various metals, copper, silver, zinc and brass being specifically mentioned, cyanide baths being used in the case of copper, silver and brass.
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