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Title: Coatings For Underground Pipelines
Author: Jack A. Evans,
Source: American Gas Association 1985
Year Published: 1985
Abstract: External coatings are considered our first line of defense against corrosion of underground pipelines. The primary function of a coating is to serve as a barrier and isolate the steel pipe from its detrimental environment earth, rock, sand, moisture, organic chemicals, bacteria, etc. A good coating system will prevent the deterioration of steel pipe buried in earth or submerged in water. An ideal or perfect coating should possess the following qualities: Be an effective insulator to resist current flow Be applied with no imperfections Remain an impervious film during the lifetime of the pipeline To date, the ideal or perfect coating has not been achieved and may never be. However, the goal should be to approach this ideal as nearly as possible and continuously strive to reach it.

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