Cathodic protection attenuation curves

Select the current density to be applied from the results of cathodic-protection tests and from any available data. On pipeline structures attenuation is always a factor and the average current density is determined from the attenuation curves, or the total current to give protection at the points most distant from the drainage point may be computed. 

Attenuation Curves a graph of interfacial electrical potentials between the pipe and surrounding soil in cathodic protection schemes V5. the length of the pipe. 

Current Drainage Survey a survey to determine current requirements for cathodic-protection schemes. A temporary groundbed is installed at a suitable location and an impressed current is applied between it and the pipe or other structure. A survey of potentials along the structure will produce attenuation curves, and permits fairly accurate estimation of initial current requirements. 

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See also in sourсe #XX -- [ , , , , ]

See also in sourсe #XX -- [ , , , , ]

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