Corrosion under insulation prevention
Wet insulation traps moisture against hot pipe and vessel walls, driving hidden corrosion that inspectors only find once metal loss is severe.
What is failing
Insulation soaks up rain, wash-down, and condensation, then holds that moisture against the hot pipe or vessel wall. The steel corrodes out of sight, often across the temperature band where CUI runs fastest. Inspectors find it only after they strip the lagging and the metal loss is already deep, which forces unplanned repairs and pulls lines out of service.
How AAS does it
AAS preps the bare hot surface and brushes a barrier coating onto the steel before the insulation goes back on, often while the line stays in service. We use high-temperature CUI systems such as Belzona 5851 and 5831, matched to the operating range. The coating cures cold on the running surface, so no shutdown or hot work is needed.
Typically applied with Belzona 5851, Belzona 5831, matched to the service conditions.
The steel gets a protective barrier across the CUI temperature band. Hidden corrosion stops, and the line keeps producing through the repair.
How AAS delivers it
AAS performs Corrosion under insulation prevention work for Oil & Gas, Petrochemical & Chemical, and Power Generation operations across Baton Rouge and Louisiana, cold-applied and in place wherever possible, on your turnaround schedule. Crews are factory-trained Belzona applicators, the repair system is matched to the service conditions it will see, and urgent failures are covered by 24-hour on-call response. The result is a permanent, engineered repair that returns the asset to service without the cost or downtime of full replacement.
Related applications
Have equipment that needs to stay in service?
Tell us what is failing. We respond quickly, and we offer 24-hour on-call service.