IMPRESSED CURRENT CATHODIC PROTECTION

摘要

An impressed current cathodic protection arrangement comprising an elongate metallic structure 2 to be protected and cathodic protection apparatus 3 which comprises a DC power supply 31 and an anode 32. One terminal of the power supply 31 is connected to the structure at a connection point 33 and another terminal of the power supply 31 is connected to the anode. The arrangement includes monitoring apparatus 4 for monitoring effectiveness of cathodic protection provided by the cathodic protection apparatus 3 by determining the electrical potential of the structure relative to surroundings at at least one location which is spaced from the connection point 33.