Galvanic anodes power cables

Further chapters cover in detail the characteristics and applications of galvanic anodes and of cathodic protection rectifiers, including specialized instruments for stray current protection and impressed current anodes. The fields of application discussed are buried pipelines storage tanks tank farms telephone, power and gas-pressurized cables ships harbor installations and the internal protection of water tanks and industrial plants. A separate chapter deals with the problems of high-tension effects on pipelines and cables. A study of costs and economic factors concludes the discussion. The appendix contains those tables and mathematical derivations which appeared appropriate for practical purposes and for rounding off the subject. 

By contrast, all buried wire connecting self-powered galvanic anodes to a protected structure are subject to current collection from the environment and are free of corrosion. Insulation on such wires is used to prevent their picking up unnecessary current producing and associated loss of anode efficiency. This is also true of the insulated cable extending from the negative terminal of the impressed current power source to the protected structure. 

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