Lining avoids tank bottom replacement
Journal Article
·
· Power Engineering; (United States)
OSTI ID:5574216
Steel petroleum storage tanks are susceptible to corrosion. The average corrosion rate of a carbon steel storage tank in crude oil service (at ambient temperatures) is more than 1 mil per year. Corrosion rates can accelerate quickly when a layer of water containing corrosive compounds, such as salt and sediment, settle to the bottom of a crude oil tank. Chlorides and other soluble salts in the water also generate a strong electrolyte that can further speed corrosion. External corrosion is another problem. For example, the bottom plates of an above-ground storage tank are vulnerable, especially if the tank is located close to the ocean or exposed to stray electrical currents in the soil. Some tanks have developed leaks in as little as five years. Faced with a quickly corroding tank bottom, tank maintenance engineers have two choices: replace it or reline it. Replacing a tank bottom can be a costly and time-consuming process. Relining the tank with a fiberglass-reinforced plastic (FRP) coating system is the least-cost alternative. A properly applied FRP lining is likely to prevent tank bottom corrosion for up to 20 years. This article describes how thick-film linings (ranging from 60 to 65 mils thick) can control internal corrosion and leaks. Such linings have sufficient strength to bridge over small perforations and are not sensitive to internal pits and other surface irregularities.
- OSTI ID:
- 5574216
- Journal Information:
- Power Engineering; (United States), Journal Name: Power Engineering; (United States) Vol. 97:11; ISSN POENAI; ISSN 0032-5961
- Country of Publication:
- United States
- Language:
- English
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