Process for improving electrode coatings

Details Process for improving electrode coatings Process for improving electrode coatings

B - Operations, Transporting

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B05D 3/14 (2006.01) B05D 1/06 (2006.01) B05D 5/12 (2006.01) H01T 1/24 (2006.01) H01T 21/00 (2006.01)

Patent

CA 1183802

- 15 - PROCESS FOR IMPROVING ELECTRODE COATINGS Abstract Disclosed is a method of improving the coating on electrodes in spark gap devices which minimizes filament formation densifies the coating, and ensures a good bond between the coating and underlying electrode. The device is coupled to a circuit which includes appropriate components so that a rapid sequence of current pulses having large amplitudes during arc initiation is passed through the device. The coating bonds with a different area of the cathode for each current pulse. The signal may be applied with appropriate reversal of polarities so that essentially the entire surface of both electrodes is thus reacted. Subsequently, the device may be subjected to an additional pulse in order to leave asperities on the surface which will increase field emission and ensure a low surge limiting voltage.

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