J. Peter Nicholson , World Pipelines Nov 2007
Corrosion is a leading cause of pipeline failures; it is reported that nearly 30% of all pipeline failures in a 30 year period 1971 and 2001 in Europe where due to external corrosion of underground or underwater pipelines. Leaks due to corrosion of pipelines result in huge economic losses and damage to the environment and can result in loss of life.
Peter Nicholson, Pipeline Rehabilitation & Maintenance, September 2006
All underground/underwater metallic pipelines are subject to corrosion where there are inadequate levels of cathodic protection. Cathodic protection is the only method of reducing or halting external corrosion on underground/underwater pipelines.
J. Peter Nicholson, World Pipelines, March 2003
Cathodic protection is an electrical method of reducing the corrosion rate of buried or submerged metallic structures, such as a pipeline. Since cathodic protection requires the flow of electrical current through the soil and onto the pipeline, chemical changes occur at the pipeline soil interface.