Severe rust and deterioration on sub-sea drilling risers in Nigeria for pipes used in offshore oil drilling operations. Due to cycles of immersion underwater and storage on deck pipes had severe corrosion problems. Very tough environment and very tough life cycle salt water, salt spray, sun, impacts, abrasion, and temperatures ranging from 4°C to 85°C. The original coating system, applied four years ago, had badly deteriorated.

Due to pitting, drilling risers were commercially blasted to SSPC-SP6 /NACE 3 standard. After surface cleaning and salt removal with CHLOR-RID , RUST GRIP was applied at 300 micron wet/150 micron DFT to encapsulate the surface metal, additional coatings included MOIST METAL GRIP (2 part water repelling epoxy), and 3 coats of ENAMO GRIP (2 part aliphatic urethane enamel top coat).

The result was a rust free, air- and waterproof, ultra-durable surface to withstand the harsh underwater environments.