Cathodic protection corroded "sacrifical metal " to act as the anode while connects protected metal to a more easily .The sacrificial metal corrodes instead if the protected metal.For structures such as long pipelines,where passive galvanic cathodic protection is not adequate an external DC electric power source is used to provide sufficient current.Single/Multiple units per cabinet and Can be interforced to PLC Operation ,High MTBF(mean time between failure)
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