Case Study

Corroserve were asked to recommend a suitable refurbishment and protective coating system for an ISO tank carrying chemicals when in service. Engineering Skills and Coatings Know How The tanks internal surface was prepared for coating by blasting Sa2½ to achieve a minimum surface profile of 50µm. A final blow down and vacuum clean was completed before all edges/corners were hand striped with Polyglass VEF, before a
first coat of VEF to a wft of 750µm was applied by airless spray.

After this first coat the bottom half of the tank (from 3 o’clock to 9 o’clock) was laminated with wetted out multi-axial glass fabric to improve the integrity of the coating and avert cracking/de-lamination of the final coating. After suitable curing a second coat of Polyglass VEF was applied to a wft of 750µm, spark testing was completed to identify any pin holes/holidays. A final coat of Polyglass VE veil cat was applied to a required dft of 200µm to complete the coating solution. Polyglass VEF is a ester/acrylic co-polymer loaded with glass flake and is ideal for use in areas were aggressive chemical conditions are experienced.

Polyglass VE veil coat is suitable for many chemical environments within the full pH range, it has excellent resistance to demineralised water and has good resistance to many solvents. It is also used in aggressive  atmospheric or spillage conditions (bund areas) and potable water applications. On competition of the lamination and coatings work the tank was filled with water to test the integrity of the coating system under high stress. Finally the ISO tank was returned to the user fully protected against chemical corrosion and prepared for a testing service life.