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Corrosion was occuring at the top edge of rubber riser sleeve due to water ingress between rubber cladding and riser. Application was completed in accordance with Belzona Know-How System Leaflet SOS-21. After completing the surface preparation, Belzona 1321 was applied to the exposed steel riser. A second coat blended with Belzona 9231 aggregate was applied to provide a perfect bond between Belzona 1321 and Belzona 2211, which was applied to seal the junction between neoprene cladding and the riser. Belzona 9341 (Reinforcement Tape) was incorporated into Belzona 2211 to increase toughness and durability.

The repairs were carried out with the riser fully operational as no hot work was required. The Belzona system provides both corrosion protection direct to the metal riser and seals junction between rubber cladding and riser creating a tough flexible waterproof seal to prevent future corrosion at this traditionally vulnerable point.

Belzona case study 4817