Tank Coating Case
A 1,000 barrel content water injection tank for Legacy in Wyoming was badly affected by corrosion. High H2S, sulfur content water at 145 degrees Fahrenheit was being stored. The tank had severe pitting from floor to ceiling. It is common for us to see pits like these on the floor and up the wall 24″ or so, but this tank was pitted all over. It had been fiber glassed and then coated over.
Unprotected fiberglass (Fiber Reinforced Plastic) is highly susceptible to water incursion and/or sun damage depending on the resin used. Water incursion will cause blistering or bubbling, though this typically takes years to show. Once this process starts, extensive delamination eventually occurs further facilitating the movement of water across tank walls.