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Title: Effects Of Cathodic Protection On Liquid Pipeline Measurement
Author: James R. Coats
Source: 1998 International School of Hydrocarbon Measurement
Year Published: 1998
Abstract: Pipe that is buried under ground or water has a tendency to have external corrosion. Corrosion is where the strength of metal pipe is eftectively reduced due to the metal molecules combining with other molecules to form a third substance. An example of this is the iron in steel pipe combining with oxygen to form iron oxide or rust, The phenomenon is due to phenomena called free ions, The molecules have either a positive or negative charge, When the molecules come in contact with a molecule of the opposite charge they combine, There are many methods of trying to reduce the effect of corrosion on pipe These include coating the pipe to isolate the metal from the surrounding medium, and to applying electrical charge to the pipe to change the polarity of the ions which eftectively reduces corrosion.

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