Method and apparatus for cathodic protection

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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204196, 204284, 204290F, C23F 1300

Patent

active

050629344

ABSTRACT:
A grid electrode for cathodic protection of steel rebar reinforced concrete structures comprising a plurality of valve metal strips having voids with an electrocatalytic surface and 2,000 to 7,000 nodes per square meter electrically conncected together to form a grid and a method of cathodically protecting steel rebar reinforced concrete structures comprising impressing a constant anodic current upon a grid made up by a plurality of valve metal strips with voids with an electrocatalytic surface and 2,000 to 7,000 nodes per square meter embedded in a steel reinforced concrete structure containing 0.5 to 5 square meters of steel surface for each square meter of concrete surface with the ratio of electrode surface to the steel surface density being selected to maintain a uniform cathodic protection current density throughout the concrete structure.

REFERENCES:
patent: 3804740 (1974-04-01), Welch
patent: 4528084 (1985-07-01), Beer et al.
patent: 4708888 (1987-11-01), Mitchell et al.
patent: 4855024 (1989-08-01), Drachnik et al.

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