Cathodic Protection of Surface Storage Tank Bottoms, 1997 Engineering Conference Proceedings
Soil side corrosion of surface storage tanks can be a serious prob-lem. In many industries the life of the tank is limited by external corrosion of the tank bottom. Cathodic protection is a cost ef-fective technique used to eliminate soil side corrosion and hence can indefinitely extend the life of the tank bottom and significantly increase the intervals between internal inspections as recommended in API 653.
Many owners are now installing secondary containment when constructing new tankage. Most of these containment liners are fabricated from non-conductive materials that may prevent the application of cathodic protection unless specific components are installed concurrently with tank fabrication.
This paper will examine the corrosion mechanisms of tank bot-toms as well as the various designs of cathodic protection systems with and without secondary containment.
Cathodic Protection of Surface Storage Tank Bottoms, 1997 Engineering Conference Proceedings