Iso 85023 Dust Level Chart Pdf Updated __full__ Instant

High cleanliness; standard requirement for underwater or immersion service.

[Strip Tape] ➔ [Discard 3 Turns] ➔ [Apply 200mm Strip] ➔ [Roll/Press 3x] ➔ [Transfer to Chart] ➔ [Grade 1-5] Required Equipment

If your ISO 8502-3 test reveals a dust level higher than the project specification allows, you must remediate the surface before painting can commence. iso 85023 dust level chart pdf updated

ISO 8502-3 standard is a critical benchmark in industrial coating, specifically designed to assess residual dust on cleaned steel surfaces before painting. Even after rigorous abrasive blasting, microscopic dust particles can remain, acting as a barrier that prevents proper paint adhesion and traps moisture, which leads to premature corrosion, peeling, and flaking. The Mechanics of the "Tape Test"

The chart is divided into two main assessment axes: A specific pressure-sensitive adhesive tape with an adhesion

Dust particles act as contaminants that prevent paint from wetting the surface properly, leading to pinholes and poor adhesion. Furthermore, dust particles are often hygroscopic (moisture-absorbing), which traps moisture between the steel and the paint, leading to osmotic blistering and corrosion.

A specific pressure-sensitive adhesive tape with an adhesion strength of at least 6.7 N per 25 mm width. forming a dense pattern.

Choose a representative area of the blast-cleaned steel. Ensure it is dry and free of condensation.

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.

High density. Particles cover a significant portion of the tape, forming a dense pattern.