G - Physics – 01 – B
Patent
G - Physics
01
B
73/61
G01B 7/00 (2006.01) C23F 13/04 (2006.01) G01N 17/02 (2006.01)
Patent
CA 2033218
IN THE CANADIAN PATENT AND TRADEMARK OFFICE PATENT APPLICATION entitled: A METHOD AND APPARATUS FOR DETERMINING INTER- ACTIONS DUE TO DIRECT CURRENTS ON ADJACENT BURIED METAL STRUCTURES in the name of: Michel BLANCHARD assignee: GAZ DE FRANCE ABSTRACT OF THE DISCLOSURE The method of determining interactions due to direct currents on adjacent buried metal structures at least one of which is connected to a direct current generator such as a cathodic protection device, consists in placing calibrated specimen test metal pieces in the vicinity of the buried metal structures, the test pieces being made of materials that are analogous to those of the structures. The test pieces are spaced apart from each other by a distance L' equal to the distance L between the structures. Reference electrodes are placed in the immediate proximity of the specimen metal test pieces and simultaneous measurements are performed firstly of the potentials of the specimen test pieces relative to the reference electrodes, and secondly of the currents flowing through the calibrated specimen test pieces when they are electrically connected to respective ones of the structures.
Gaz de France
Mccarthy Tetrault Llp
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