Standard Potential Magnesium Anodes

Magnesium Anodes

In average soil conditions, H- 1 alloy, co mm only known as standard potential magnesium, is an excellent choice in cathodic protection systems. Typically, 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. Chemical composition% Alloy Al Zn Mn Si (max) Cu (max) Ni (max) Fe (max) Total of Impurities (max)

AZ63B5. 30- 6. 702. 50- 3. 500. 15- 0. 600. 080. 010. 0010. 0030. 30

AZ31D2. 5- 3. 50. 6- 1. 40. 2- 1. 00. 080. 010. 0010. 0020. 30

AZ63C5. 30- 6. 702. 50- 3. 500. 15- 0. 700. 300. 050. 0030. 0030. 30

Electrochemical properties Open voltage (- V) Closed voltage (- V) Actual capacity (A. h/ kg) Efficiency (% )

1. 50- 1. 551. 45- 1. 501, 230 min55 min