C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 13/04 (2006.01)
Patent
CA 2073530
ABSTRACT OF THE DISCLOSURE A method of cathodic corrosion protection of a conductive objective and a system therefore, this system comprising at least one electrode for contact with an electrolyte, a control unit connected to the electrode and for connection to the object to complete a circuit through said electrolyte, and a means for providing power to the control unit. The control unit comprises a switch means for interrupting current flow in the circuit at predetermined intervals, each time interval comprising a first time segment during which said current flow remains interrupted and a succeeding second time segment, a comparator means for measuring the potential difference between the electrode and the object when there is no current flow in the circuit and for comparing the measured potential to a predetermined voltage value, the control unit closing the circuit during the second time segment only if and when the comparison indicates that additional corrosion protection of the object is required.
Farkas Edward J.
Hambleton Brian J.
Hayes David
Overall John C. K.
Williamson Frank David
Bereskin & Parr
Canadian Gas Research Institute
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