Impressed current system disadvantages

The use of an impressed-current system or sacrificial anodes will both provide satisfactory cathodic protection, but each has advantages and disadvantages with respect to the other (Table 10.24). 

Impressed-current-type systems also have disadvantages that limit their application ... 

Galvanic cathodic protection has its own advantages and disadvantages relative to impressed current cathodic protection and the other electrochemical and conventional rehabilitation techniques. The different anode systems also have their own merits and limitations. 

The following are the advantages and disadvantages of impressed current anode systems ... 

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