Enhancement of Cathodic Protection System for Internal Surface of Process Vessels

摘要

Process vessels are very critical equipment's in Oil and Gas industries. Protecting internal submerged surfaces of such vessels from the corrosion is a challenging task for corrosion engineers, especially vessels which are involved with dissimilar and bare internal metallic structures, high operating temperatures, fluid velocities and low electrolyte resistivity. The protective current demand of vessel internal cathodic protection (CP) system have been reduced substantially by coating all internal structures irrespective of materials of construction and isolating the dissimilar internal metallic structures. This paper describes case studies, where enhancement of CP system is made to avoid premature failure of sacrificial anodes.