Pipeline Current Mapper (PCM)
Definition - What does Pipeline Current Mapper (PCM) mean?
A pipeline current mapper (PCM) is a corrosion monitoring type of equipment used to perform alternating current coating attenuation surveys. Results from this survey are then used to prevent pipeline corrosion.
A pipeline current mapper operates by measuring the electric current characteristics of a given section of an above-ground or underground pipe. The electric current over the entire length of the pipe is measured and charted. This useful information can be used to prevent corrosion.
Corrosionpedia explains Pipeline Current Mapper (PCM)
Most pipeline corrosion occurs due to an electrochemical reaction in the presence of an electrolyte. The corrosion process also facilitates detection of the deterioration, which is accomplished by monitoring the voltages and the currents associated with the corrosion.