Sensor for determination of the polarization potential and/or th

Details Sensor for determination of the polarization potential and/or th Sensor for determination of the polarization potential and/or th

1977-10-06

1980-06-17

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

324 65CR, G01N 2746

Patent

active

042082641

ABSTRACT:
The sensor according to the invention has at least one metal electrode of the same material as the measured structure and a permanent reference electrode. The measuring surface area of the metal electrode satisfies the relation 2.0m.sup.2 .gtoreq.S.gtoreq.0.1cm.sup.2, where S is the measuring surface of the electrode. The sensor is buried in the ground at a distance L from the measured structure, said distance L satisfying the relations 20m.gtoreq.L.gtoreq.0.1m and L.gtoreq.6R, where R is the radius of a hypothetical sphere having the same surface area as the measured non-linear structure, or the radius of a cylindrical linear structure such as a pipeline.

REFERENCES:
patent: 2878354 (1959-03-01), Ellison
patent: 3660249 (1972-05-01), Townsend
patent: 3999121 (1976-12-01), Taylor, Jr.
patent: 4051436 (1977-09-01), Weir, Jr.
patent: 4080565 (1978-03-01), Polak

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