How Rustrol® Cells Work
Rustrol® Polarization Cells contain pairs of pure nickel plates immersed in KOH electrolyte. The surfaces of these plates instantly polarize when separated metallic structures are connected to opposite terminals. The polarizing film blocks DC, to contain cathodic protection current, while freely passing AC. Personnel are safely protected from shock hazards during AC faults. Insulating fittings and equipment are protected during electrical disturbances.
Separated underground or submerged metallic structures are efficiently protected. Isolated structures, which must remain effectively grounded to the AC utility network, are designed to meet this requirement in national electrical safety codes. Installations specifying Rustrol® Polarization Cells for cathodic isolation, are regularly accepted by North American electrical inspectors.