What is a common sign of a malfunctioning CP system?

A common sign of a malfunctioning cathodic protection (CP) system is zero current output. This situation indicates that the system is not providing any protective current to the structure intended to be safeguarded, which could lead to corrosion and damage. Current output is a critical parameter in assessing the functionality of a CP system because it ensures that the voltage potential is maintained across the protected structure, effectively inhibiting corrosion.

In a properly functioning CP system, there should be measurable current flowing from the anodes to the protected structure. If the current output is zero, it suggests that there might be an issue with the system components, such as a failure in the power source, a break in the wiring, disconnected anodes, or an issue within the control system. Therefore, the identification of zero current output is essential for diagnosing problems within the CP system and taking corrective action to ensure effective corrosion protection.

Increased voltage readings, higher than normal moisture levels, and an extended service life of anodes do not directly indicate a malfunction in the CP system. Increased voltage might suggest varied operational characteristics under certain conditions, higher moisture levels can relate to environmental factors rather than system performance, and an extended service life of anodes typically indicates effective protective measures rather than malfunction. Thus