Corrosion and severe abrasion were two serious problems at this industrial phosphate facility. Maintenance engineers had tried several coating systems over the preceding years in an effort to protect both steel and concrete surfaces.
While various epoxy systems offered some protection they were short lived and took far too long to cure at time of installation.
After in depth research, it was determined that a rapid cure polyurea system might be the solution.
VersaFlex was consulted and a polyurea metal coating system was specified for all surfaces. The approved VersaFlex contractor installed VersaFlex FSS 50DM spray coating to the top of the clarifier tanks to protect steel from dripping 28% phosphoric acid.
In addition, numerous steel support beams were coated for protection against 5% fluosilic acid vapor, which is highly corrosive.
Both shaft and flights on the gypsum filter table needed protection from 10% phosphoric acid as well as the abrasive gypsum in order to extend the auger life from 1 to 3 years.
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Case Study Summary Info
- Project: Clarifier Tank Tops
- Owner: S.F. Phosphates Industrial Plant
- Contractor: Systems Development Service
- Coating System: FSS-50DM Spray Membrane
- Project Scope: 41,000 S.F.
- Installation: Mid 1995