Cable anodes advantage

Cable anodes of conducting polymers have an advantage when there are site problems with the installation of other anodes. They are extensively used for the cathodic protection of reinforcing steel in concrete (see Section 19.5.4). 

Alloys of zinc, aluminum, and lithium have also been considered for special-purpose seawater batteries. Zinc can be used as the anode in low-current, low-power long-Ufe batteries. It has the advantage of not sludging, but the disadvantage of being a low-power-density system. Zmc/sUver chloride seawater batteries have been used as the power source for repeaters for submarine telephone cables (for example, 5 mA at 0.9-1.1 V for 1 year of operation). 

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