Surface cleanliness is the foundation of any long-lasting protective coating. Dust on blast-cleaned steel can significantly reduce the adhesion of organic coatings and promote corrosion by trapping moisture. The ISO 8502-3 standard provides a standardized method to quantify and categorize this dust, allowing inspectors to make objective "pass/fail" decisions before paint application.
Sweeping or blowing compressed air often just redistributes dust around the job site. Use heavy-duty industrial vacuums equipped with HEPA filters to pull dust out of the profile. iso 85023 dust level chart pdf updated
: Particles visible only under 10x magnification (typically below 50 µm). Surface cleanliness is the foundation of any long-lasting
"Q3, M100, Mx300" translates to: Quantity Class 3 dust, median particle size 100 micrometers, maximum particle size 300 micrometers. Sweeping or blowing compressed air often just redistributes
Apply firm pressure using your thumb or a calibrated roller, moving at a constant speed, three times in each direction, taking about 5–6 seconds per stroke. Removal: Peel the tape off the surface at a steady rate.