In Saline Water Conversion Corporation (SWCC) Potable water above storage tanks (ASTs) have the capacity to store 140,000 m3 of produced water. After more than 20 years in operation one of these tanks experienced different types of corrosion problems. To know the integrity of the tank material complete off-line assessments were carried out at interior and exterior of ASTs.

The assessment was based on physical observation, corrosion product analysis by using different techniques, comprehensive water quality parameters and cathodic protection system review. During root cause analysis the presence of blistered coating, and blistered coating with pinhole were noticed. In this paper corrosion mechanisms have been discussed and remaining life assessment has been recommended to develop a plan for cleaning and repair of the tank bottom, if required.

Subject
Water, Coatings, Materials, Piping, Cathodic protection, Leaks, Corrosion products, Roofs, Crevice corrosion, Water quality, Carbon steel, Stainless steel, Blistering
Keywords:
Water Tanks, Coating, Cathodic Protection, Crevice Corrosion, Pitting, carbon steel
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2023
GOV
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