Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1987-09-08
1989-03-14
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204196, 204294, C23F 1300
Patent
active
048122122
ABSTRACT:
A novel method and apparatus for cathodic protection of reinforced concrete structures includes an anode structure having an electrically conducting tape that is prevented from directly contacting the surface of the concrete structure. An electrically conducting coating is applied over the tape and in contact with the concrete surface to form an anode electrically connected to the tape and the concrete surface. The tape may conveniently employ a commercially available graphite tape with an adhered, electrically insulating backing. A preferred electrical connection to the tape includes a bus bar that compresses the tape by means of a screw engaging a masonry anchor mounted in the concrete structure. Preferably, the bus bar screw also mounts an electrically insulating junction box to the concrete surface to enclose the anode connection. The junction box may also cover an opening in the concrete surface through which the cathode connection to a reinforcing member is made. Wires connected to the terminals of a direct current power supply which provides the cathodic protection current are supplied to the junction box through which connections to the tape and cathode are made.
REFERENCES:
patent: 2491225 (1949-12-01), Stearns
patent: 3037926 (1962-06-01), Ambler
patent: 3404061 (1968-10-01), Shane et al.
patent: 3868313 (1975-02-01), Gay
patent: 4255241 (1981-03-01), Kroon et al.
patent: 4308122 (1981-12-01), Das Gupta et al.
patent: 4502929 (1985-03-01), Stewart et al.
Publication of Matcor, Inc., "Steel-in-Concrete Corrosion & Cathodic Protection", Pub. No. D-185, 1985, pp. 16-31.
Dimond James
Swackhammer William
Harco Technologies Corporation
Tung T.
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