OVERVIEW: In the complete refurbishment of the underside of this floating structure, some areas were replaced. Other areas required repairs to be done in-situ by using underwater curing epoxies. A team of experienced divers applied the underwater curing Epo chem™ system, which is able to provide full coverage to surfaces where ideal surface preparation cannot be achieved.
INDUSTRY
ENVIRONMENT
Seawater
SUBSTRATE
Steel Brackets
CHALLENGE
The use of underwater curing epoxies was the most practical solution for this project. In the complete refurbishment of the underside of this floating structure, some areas were replaced. Other areas required repairs to be done in-situ by using underwater curing epoxies. A team of experienced divers applied the underwater curing epoxy coating.
SOLUTION
Chemco’s surface tolerant Epo chem™ system is able to provide full coverage to surfaces where ideal surface preparation cannot be achieved
SCOPE
Repairs were carried out at low tide where possible. Freshwater washing sections provide suitable surface preparation before applying the underwater curing epoxies
Removal of large, flaking corroded areas and coating back to bare steel by mechanical preparation using pneumatic needle gun, air chisel, scabbling and bristle blaster
Preparation underwater to St 2 by using an underwater grinder
Primer applied to create a continuous coating without pinholes wearing gloves and application mitts
Product lathered on in small, workable sections and cured overnight
The next day at low tide, the repair area above the surface washed with fresh water, then RA 500M, glass flake filled topcoat applied to above and below water sections
PRODUCTS
OUTCOME
By coating with Epo chem™, follow up inspections indicate the coating and repairs are still in good condition and is expected to exceed 10 years life in service
RELATED CASE STUDIES
Stern Tube Life Extension During Half-life Refit
Patrol boat in slipway for refit Protection against abrasive blasting damage Application of RB364 Tube internal lining complete Overview: The half-life refit of critical components
Air Receiver Restoration for Long-Term Durability
Pitting corrosion near shaft landing After first abrasive blasting After 2nd Abrasive blast holes were found requiring composite reinforcement Filling void in difficult to reach
High Performing Replacement for 316L SS
On inspection flange corrosion Deep pitting on forged section Application of 1st coat Ready to be put into service for 25+ years of life OVERVIEW: