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Resistance and Output Currents of Sacrificial Anodes

Nominal Weight (lb) Anode Package Size (in) Soil Restis-
tivity (ohms)
Anode Resis-
tance (ohms)
Current output and
est. life for structure
Potential (volts):
0.3
(mA)
(yrs)
0.5 (mA)
(yrs)
0.85 (mA)
(yrs)
Standard magnesium - AZ63 (Hi alloy) - solution potetial - 1.55 V
17 22x7 5000 23 54 19 46 21 30 33
    10000 46 27 37 23 15  
    20000 92 14 11 8  
 
32 26x8.5 20000 7.7 162 12 136 15 91 22
    5000 19 66 30 55 36 37
    10000 38 33 60 28 18  
 
50 22x10 2000 7.1 176 17 147 20 98 31
    5000 18 69 43 58 39  
    10000 36 35 29 19  
 
High - potential magnesium - solution potential - 1.73 V
17 38x6 5000 19 75 13 65 15 46 22
    10000 39 37 32 31 23 23 43
    20000 18 16 11    
 
48 34x8 2000 7.2 199