Every system designed to prevent stray cunent corrosion uses one or more of the following methods: Insulation, cathodic protection and drainage. Insulation is achieved by electrically isolating a structure completely from earth contact. Cathodic protection employs current from suitably located anodes to a structure causing polarization at a voltage slightly more negative than the open circuit or static voltage of that structure to soil. Drainage is a bond between a structure and a direct cunent source to permit the flow of current from one to the other.

Subject
Electric current, Steel structures, Voltage, Cathodic protection, Reactors, Structures, Wiring, Open circuits, Cables, Traction, Rectifiers, Stray current, Drainage
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1970
Association for Materials Protection and Performance (AMPP)
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