Method and device for the detection of corrosion in steel cathodically protected buried, especially in the concrete or determine armor if passive.

摘要

Method and device for the detection of corrosion in steel cathodically protected buried, especially in the concrete reinforcement or determine whether it is passive.; The present invention is based on that after the confinement of a DC carrier, an alternating current is modulated; the gap between the AC current and the alternating potential applied reveals whether cathodic protection is effective, provided that the frequency range of the alternating current is between 0.01 and 100 Hz. The process of generating an alternating current which is applied between the buried steel and a counter located on the ground surface; by a conventional electronic system the value of the voltage u and the current i applied, which, computarizándolas in a suitable device, allow to know the phase angle in {}, whose value indicates whether or cathodic protection is not effective is measured.