A piece of pressure-sensitive tape is applied to the prepared steel surface. Pressure is applied to ensure the tape makes full contact with the dust particles, which are then lifted off when the tape is removed.

This comprehensive guide breaks down the pressure-sensitive tape method, dust quantity ratings, particle size classes, and how to utilize standard-compliant record sheets. What is ISO 8502-3?

Pass a standardized roller or your thumb firmly over the tape three times to ensure maximum contact with any loose dust particles.

It is primarily suited for assessing rust grades A, B, and C as defined in ISO 8501-1. The ISO 8502-3 Dust Level Chart (Updated Guide)

Dust particles, particularly soluble salts, can act as corrosion initiators under the coating.