Iso 8502-3 Dust Level Chart

If you only buy one dust assessment reference, get the ISO 8502-3 chart. Just remember to pair it with salt testing for complete surface cleanliness.

: The captured dust is visually compared against pictorial references to determine its quantity and inspected under magnification to determine its particle size . ISO 8502-3 Dust Level Ratings

Here are the ISO 8502-3 dust level classes: iso 8502-3 dust level chart

The ISO 8502-3 chart is the field reference for quantifying residual dust after abrasive blasting. It’s simple, visual, and directly linked to coating performance. However, it has limitations that every inspector should know.

Understanding the ISO 8502-3 Dust Level Chart: A Guide to Surface Cleanliness If you only buy one dust assessment reference,

: Dust is visible under 10x magnification but not to the naked eye.

Instead of saying “some dust,” you can report “ISO 8502-3: Dust size 4, quantity 2” – understood globally. ISO 8502-3 Dust Level Ratings Here are the

Lighting, tape type, and inspector experience affect results. Two inspectors may rate the same dust differently. The chart is a guide, not a precision instrument.

The chart breaks dust into three particle size ranges:

Dust smaller than size 3 (< 0.05 mm) isn’t classified, yet submicron dust can still cause coating pinholes or poor adhesion.