The following case study was developed in South Africa for an offshore application. PRIMAPOX 6021 primer and PUR 800-G polyurethane binder from Disolac, a certified system with C-5 High rating according to standard ISO 12944, which determines the degree of corrosion, was recommended. This system has been successfully tested in neutral salt spray (NS) resistant to 1440h and condensation water atmosphere (CWA) resistant to 720h.
Challenge posed
An effective solution was needed to provide long-term resistance in equipment exposed to offshore environmental conditions, such as salt spray and water condensation. Previously, other solutions had been tried without a satisfactory result.
Proposed solution
Professional painters applied over 70 gallons of PRIMAPOX 6021 and PUR 800-G to the equipment. The total paint applied was 0.23 mm (9 mils) thick, distributed in 0.15 mm (6 mils) of PRIMAPOX 6021 applied by airless spray gun in two coats, achieving 0.07 mm (3 mils) per coat. This epoxy primer provided the corrosion resistance that is crucial for offshore use of the equipment.
After allowing the second coat of PRIMAPOX 6021 epoxy primer to dry for 3 hours, PUR 800-G was applied using airless equipment, achieving 0.03 mm (1.5 mils) per coat. PUR 800-G polyurethane provided the gloss finish, UV resistance and chemical resistance that the application required.
Step 1
Step 2
Result obtained
With the combination of PRIMAPOX 6021 primer and PUR 800-G polyurethane from Disolac, the necessary results required by the customer were achieved: protecting the equipment from corrosion caused by the environmental conditions at sea.
