Dust Test Iso 8502-3 [hot] Link

This ranks how much of the tape area is covered by dust, ranging from 0 to 5. : Surface is free of dust (no visible particles). Class 1 : Very low amount of dust (scattered particles). Class 2 : Small amount of dust. Class 3 : Moderate amount of dust. Class 4 : Significant amount of dust. Class 5 : Dense dust coverage. 2. Dust Size Class This classifies the diameter/size of the particles found. Class 0 : Particles not visible under 10x magnification.

While ISO 8502-3 is widely used, inspectors and engineers must understand its limitations: dust test iso 8502-3

: Use specific adhesive tape (as defined by the standard). This ranks how much of the tape area

The , also known as the "pressure-sensitive tape method," is a critical quality control procedure used to assess the amount and size of loose dust remaining on blast-cleaned steel surfaces before painting. Even invisible dust can act as a barrier to adhesion, leading to premature coating failure through peeling, flaking, or underfilm corrosion. Importance of the ISO 8502-3 Test Class 2 : Small amount of dust