CP: Cathodic Protection: حماية القطب السالب ( الكاثود

According to the American Water Works Association (AWWA), the majority of water distribution system pipes are composed of iron material. Water pipeline corrosion can cause loss of pipe, water, and negatively impact the quality of drinking water. As in the oil and gas industry, cathodic protection (CP) is of critical importance to water pipeline operators.

Corrosion generally occurs where current leaves a line into an electrolyte, so we need to know the direction of current flowing in a line. The amount of metal lost by a line is proportional to the magnitude of the current leaving the line into soil or sea water. As Dr. John Leeds has said, "Industry would do well to shift to methods that read Cathodic Protection (CP) current amperage and direction..." [Pipeline & Gas Industry - April 1997 - page 55.]

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