Iso 85023 Dust Level Chart Pdf Updated -

The ISO 8502-3 test, often called the is a simple, visual, qualitative method. It utilizes a standardized pressure-sensitive adhesive tape to lift particulate matter directly from a prepared steel surface.

The standard prescribes a simple, low-cost, yet highly effective field test using clear pressure-sensitive adhesive tape. Required Equipment

Low density. Particles are visible to the naked eye but cover a minimal percentage of the surface area.

. Dust particles left on a steel substrate act as a barrier, preventing proper coating adhesion and trapping moisture that leads to catastrophic, premature coating failures like blistering, peeling, and under-film corrosion. iso 85023 dust level chart pdf updated

This rating defines the concentration or density of the dust particles captured on the tape.

The quantity rating relies on a visual comparison between the used test tape and pictorial reference images. The ratings are derived from ISO 4628-1 and run on a scale from 0 to 5:

This is a qualitative visual comparison ranging from 1 to 5 based on pictorial references: Smallest amount of surface dust. The ISO 8502-3 test, often called the is

A reference displaying defined dust quantity and particle size ratings.

When users search for an "updated PDF chart," they are typically looking for the . This chart is not a document that is freely published by ISO itself; instead, it is a commercial product supplied by manufacturers of testing equipment (like DeFelsko, Elcometer, TQC) as part of their ISO 8502-3 test kits.

In most industrial coating specifications, Rating 2 is the maximum allowable level for both quantity and size; anything higher typically requires re-cleaning. Required Equipment Low density

The current version of the standard is ISO 8502-3:2017 , which replaced previous editions like the 1992 version. This standard provides a qualitative, pressure-sensitive tape method to assess the quantity and size of dust remaining on blast-cleaned steel surfaces before painting. iTeh Standards ISO 8502-3 Dust Level Classifications The assessment is divided into two primary metrics: Quantity Rating Size Class iTeh Standards Particle Size Description Particle Diameter No particles visible under 10x magnification Visible under 10x magnification, not by naked eye Just visible with normal/corrected vision Clearly visible with normal/corrected vision Large particles clearly visible Very large particles clearly visible Quantity Rating (1–5):

Surface contaminants are removed, allowing the coating to anchor securely.

This visual rating compares the density of dust particles on a test tape against pictorial references.

Retroactive. The word felt like a hammer.

No dust present (Background contrast equal to reference). Class 1: Very low dust (Slightly detectable). Class 2: Low dust (Clearly visible but small amount). Class 3: Moderate dust (Moderate amount). Class 4: High dust (Large amount). Class 5: Very high dust (Extremely large amount). Particle Size Assessment