In average soil conditions, H-1 alloy, commonly known as standard potential magnesium, is an excellent choice in cathodic protection systems. Typically, CorrTech H-1 anodes produce a minimum open circuit potential of 1.52 volts with respect to Cu-CuSO4. Therefore, the driving potential of the H-1 cathodic protection anodes exceeds that of aluminum or zinc, but is still lower than a high potential magnesium anode.
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