How Long Does Coil Coating Last in a C5 Environment?
Key facts
| Factor | Effect on life |
|---|---|
| Coverage at collars and joints | Missed areas corrode first and spread under the film |
| Cure | Under-cured films lose adhesion early |
| Film system | Chemical exposure needs a chemical-resistant film |
| Damage at installation | Scratches and bent fins expose bare metal |
| Maintenance | Regular fresh-water rinsing removes salt build-up |
Why there is no simple answer
Salt spray hours rank coatings in a laboratory; they do not predict years outdoors. Field life depends as much on how the coating was applied and how the coil is maintained as on the coating itself.
What shortens it
Missed areas at fin collars, under-cured film, damage during installation, and salt left to build up for years. In C5 sites these problems show quickly.
What extends it
Full coverage by dip, a logged cure, careful handling, and a rinsing schedule — more often after storms and in dry seasons when salt is not washed off by rain.
What this means for your project
Ask each supplier what the warranty covers and for how long, which test data supports it, and what maintenance it assumes. Ask us for the warranty terms that apply to your system and site category.
Technically reviewed byPelagard Technical TeamCoating selection, application and quality controlLast reviewed:
