:: Corrosion Service :: AC Interference and Mitigation


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Pipelines may share a common right-of-way with parallel high voltage AC power lines resulting in mutual interference effects. The capacitive, ohmic or inductive AC coupling between power lines and pipelines may result in:

     1. Danger to the safety of personnel under normal operation (15 Volt limit)
     2. Danger to the safety of personnel under fault conditions
     3. Danger to the pipeline integrity under fault conditions
     4. Risk of AC-enhanced corrosion under normal operation
     5. Risk of damage to the coating from electrical stress under fault conditions

At normal operating levels, cathodic protection will not mitigate AC corrosion to above a certain AC current threshold density. As a result, AC mitigation is often required to prevent this type of corrosion. Using AC mitigation techniques, the AC current density is maintained below a critical value to prevent AC corrosion of a steel pipeline.

Corrosion Service is a world leader in AC mitigation. We provide the following AC mitigation services:

Site Surveys
Modeling
Calculations
Design of the mitigation system