Cathodic protection system using impressed current and...

Details Cathodic protection system using impressed current and... Cathodic protection system using impressed current and...

2007-09-04

2007-09-04

Bell, Bruce F. (Department: 1746)

Electrolysis: processes, compositions used therein, and methods

Electrolytic material treatment

Metal or metal alloy

C205S740000

Reexamination Certificate

active

10996810

ABSTRACT:
Cathodic protection of steel in a building or other concrete or similar structure is provided by locating an anode in a suitable location adjacent to the steel and providing an impressed current from a power supply to the anode. The anode is formed from a material which is more electro-negative than the steel so that in the event that the power supply falls below the galvanic potential therebetween, current flows under galvanic action to replace the impressed current. A diode in the circuit prevents flow of current across the power supply but allows the galvanic current when the power supply fails open circuit. An additional diode can be provided in the event the power supply fails closed circuit to prevent reverse current flow.

REFERENCES:
patent: H000544 (1988-11-01), Castillo et al.
patent: 6346188 (2002-02-01), Shuster et al.

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