Technical FAQ

SSPC-SP 10 (or NACE No. 2) is a standard for "Near-White Metal Blast Cleaning." It requires the removal of all visible oil, grease, dust, dirt, mill scale, rust, and coating. Staining from rust or old coating is permitted on no more than 5% of each unit area of surface. It is the standard requirement for high-performance immersion or chemical exposure systems.

Blistering is typically caused by trapped moisture, solvent entrapment, or osmotic pressure. If a surface is damp during application, or if the coating is applied too thickly (preventing solvent from evaporating before the surface skins over), blisters will form as the trapped gas or liquid expands.

DFT is measured using specialized, calibrated magnetic or ultrasonic gauges following ASTM D7091 standards. Measurements are taken after the coating has fully cured to ensure the specified thickness has been achieved.

Generally, no. Polyurethanes offer excellent UV protection but lack the anti-corrosive and adhesion properties required for direct-to-metal application in heavy industry. They should be applied over a compatible epoxy or zinc-rich primer.

The dew point is the temperature at which air becomes saturated and moisture condenses on surfaces. Industry standards dictate that the steel surface temperature must be at least 3°C (5°F) above the dew point during blasting and coating application to prevent flash rust and micro-blistering.