Method and apparatus for measuring the corrosion current of an i

Details Method and apparatus for measuring the corrosion current of an i Method and apparatus for measuring the corrosion current of an i

1977-06-07

1979-01-09

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 65CR, 324118, 324127, G01N 2742

Patent

active

041340590

ABSTRACT:
The invention relates to a method and apparatus for measuring the corrosion current of an elongated structure immersed in a fluid and provided with a cathodic protection device, the apparatus comprising at least one closed magnetic circuit immersed in the fluid and orientated so that a certain amount of electric current can pass therethrough, a coil on this magnetic circuit, measuring means connected to the terminals of this coil and modulation means (perforated rotating disc) for periodically varying, in time, the quantity of electric current circulating through the magnetic circuit. The invention is applied more particularly to the surveillance of underwater pipe-lines.

REFERENCES:
patent: 2297568 (1942-09-01), Leonardon
patent: 2802182 (1957-08-01), Godshalk et al.
patent: 2820947 (1958-01-01), Gunn
patent: 2839722 (1958-06-01), Marsh

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