Iso 85023 Dust Level Chart Pdf Updated
| Error | Consequence | Correction | |-------|-------------|-------------| | Using non-approved tape | Underestimates dust | Use ISO-specified tape | | Pressing too lightly | Misses embedded dust | Apply ≥ 5 N/cm² pressure | | Viewing without magnification | Misses fine dust (Class 1–2) | Always use ×10 minimum | | Only checking one location | Non-representative result | Take 5 samples per 10 m² |
To execute a compliant test, standard kits like the or the DeFelsko PosiTest DT are used.
Using outdated or unofficial reference materials can result in non-compliance flags during third-party asset integrity audits. iso 85023 dust level chart pdf updated
: Pull a fresh, unblemished strip of tape roughly long. Handle it strictly by the ends.
The standard, titled "Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)," is a critical benchmark in industrial coating to ensure surface cleanliness. The latest version is ISO 8502-3:2017 , which replaced the older 1992 and 2000 versions. The Role of ISO 8502-3 in Surface Preparation Handle it strictly by the ends
The is an indispensable tool for any coating inspector, contractor, or engineer. Understanding the difference between Class 1, 2, and 3—and correctly applying the pressure-sensitive tape method—can mean the difference between a 20-year coating lifespan and a 6-month failure.
The updated standard emphasizes that any visible dust of size >500 µm is an automatic failure , regardless of quantity class. The Role of ISO 8502-3 in Surface Preparation
If a tape sample exhibits an overall reddish-brown or black discoloration, the rule requires inspectors to record a Quantity Rating 5 and Size Class 1 . This indicates a massive concentration of microscopic abrasive breakdown dust that can severely interfere with coating adhesion. Standard Step-by-Step Testing Procedure
: Trace to light dust (often acceptable for high-performance coatings).
: Specially calibrated tape with an adhesive strength profile matching standard parameters.
Particles visible under 10x magnification only (under 50 μm). 10x Illuminated Magnifier
