Choosing epoxy systems, film thickness, and surface prep for longer tank life.
Surface prep decides coating life
Even the best paint fails on oily or rusty steel. Blast cleaning to the specified grade, checking surface profile, and a short window before spraying are the three keys to durability.
Choosing a coating system
| Location | Common system | Purpose |
|---|---|---|
| Inside a potable-water tank | Certified hygienic epoxy | Direct contact with drinking water |
| Inside a fuel/product tank | Solvent-resistant epoxy | Resists hydrocarbons |
| Outside, exposed to weather | Epoxy primer + polyurethane topcoat | UV and weather resistance |
After application, dry-film thickness is checked with a DFT gauge and coating continuity with a holiday test — a single pinhole is enough to start localized corrosion under the coating.
