Case Study

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Brochure

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Solution Animation

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Products

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Problem

Certain grades of oil that contain sulphur emit corrosive vapors that destroy the internal surfaces of storage tank roofs and their support structures above the product layer. Aggressive pitting and crevice corrosion create holes in the tank tops that cause unsafe operating conditions and environmental problems. Internal tank coatings decrease surface corrosion but have proven to be ineffective in preventing dangerous pitting and crevice corrosion – especially in the interstitial spaces between the roof and support structures

IMPACT TO OPERATORS

This problem impacts petrochemical facilities causing stoppage of tank operations and necessitating periodic roof replacements.

  • Hard Dollar Losses
    • Capital and labor required to replace a tank roof
    • Loss of stored product due to evaporation when there are holes
    • Opportunity cost of tanks being out of operation
  • Intangible Costs
    • Significant loss of efficiency during the operating life of the tank
    • Contamination of stored products (rust, epoxy flakes, water, etc.) that affects product quality
    • Risk of environmental, health and safety problems
    • Risk of explosions and/or fire

Videos

Product Information

NTIC has developed the Zerust® ReCAST-R solution to protect the interior surface of AST roofs, consisting of dispensers that deliver the proprietary inhibitor formulations into the vapor space between the surface of the product and tank roof. The Zerust inhibitor forms a protective layer that prevents corrosion in highly-aggressive environment (H2S, SO2, etc). Zerust ReCAST-R solution can be implemented to extend the service life of a single tank roof to 25 years and beyond. Each system is tailored to client’s requirements, depending on specific environmental conditions, product stored, tank diameter, and can be applied on both new and existing roofs.

Product Applications

Certain grades of oil that contain sulphur emit corrosive, sour gas vapors that destroy the internal surfaces of Aboveground Storage Tank (AST) roofs and their support structures above the product layer. Aggressive pitting and crevice corrosion create holes in the tank tops that cause unsafe operating conditions and environmental problems. Internal tank coatings decrease surface corrosion but have proven to be ineffective in preventing dangerous pitting and crevice corrosion – especially in the interstitial spaces between the roof and support structures.