Polarization Potential Criteria
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Polarization potential measurement is a crucial and accurate method for assessing the cathodic protection condition of underground facilities, providing the most precise and rapid means of evaluation. Potentials are measured in two ways: natural potential, where no impressed current is applied, and preotective potential, measured after applying impressed current.
Reference electrode | Protection potential | Remarks |
---|---|---|
Silver/Silver Chloride | - 780 mV | Ag/AgCl |
Copper/Copper sulfate | - 850 mV | Cu/CuSo4 |
Zinc | + 250 mV | Zinc |