The Effect of HVDC Ground Current on Oil Field Corrosion

The advent of HVDC power transmission raises serious questions about the possible adverse effects of HVDC ground current on uncoated well casings and short pipelines. Model studies indicate that interference will be a problem near the ground electrodes. Proximity of well casings to the anodic ground electrode will be particularly harmful because corrosion is intensified toward the lower ends of the casings, where cathodic protection is most difficult.