How this coating category should be evaluated.
Protective coating performance on steel begins with the environment and surface preparation. Exposure category, corrosion, fabrication condition, cleaning standard, primer compatibility, film build and topcoat requirements should be considered together.
Application challenge
Steel may be delivered with mill scale, rust, oil, weld contamination or an existing coating. Outdoor exposure, humidity, chemicals and abrasion can further change the required system.
System approach
A protective system may use a corrosion-control primer, an intermediate build coat and a weather- or wear-resistant finish. The specification should define preparation, dry-film thickness, recoating and color requirements.
