System to detect corrosion induced by microbiological attack, at submerged offshore carbon steel installations, comprises use of probe attached to structure as cathode with anode at probe head to monitor current behavior between them

摘要

To detect the presence of corrosion at a carbon steel structure (2), induced by microbiological attack, two steel or carbon electrodes are used as an anode and a cathode. A current is passed between the two electrodes, with a monitor to measure the current and/or the difference in potential between the electrodes. A probe (1), with a carbon steel surface, is attached to the structure by an electrical insulation or contact, with electrical power supply cables (102, 103). The probe head (14) carries the anode (A), and the probe acts as the cathode.