Passivation is the scaling, oxidation and pitting of the anode and cathode (sacrificial electrodes). The impediment is driven by the fluid’s scaling potential and the concentration of Total Dissolved Solids (TDS) in the solution. Passivation occurs rapidly and can hinder an EC treatment within hours, requiring remediation or replacement of the electrodes, a costly procedure. Problems caused by passivation include:
With passivation, volts are drawn to maintain the required amps, resulting in higher power consumption. When the volts are maxed, traditional EC units must be removed from service for electrode maintenance or replacement.