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
A compliant ISO 8502-3 report should include:
Moderate amount of dust; clearly visible to the naked eye. iso 85023 dust level chart pdf updated
Pass a standardized roller or your thumb firmly over the tape three times to ensure maximum contact with any loose dust particles.
Dust particles, particularly soluble salts, can act as corrosion initiators under the coating. The standard, titled "Assessment of dust on steel
: Large particles easily visible to the naked eye. Practical Application and PDF Reporting
In other words:
This classification system allows inspectors to characterize the typical particle size present on the test surface, which directly influences the potential impact on coating performance.
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" Pass a standardized roller or your thumb firmly
Surface preparation is widely regarded as the most critical stage in any industrial coating project. While visible contaminants like rust and mill scale are often the primary focus, microscopic "invisible" threats like residual dust can be equally devastating to a coating's lifespan. ISO 8502-3 provides the standardized framework necessary to detect and quantify these particles using a simple yet effective pressure-sensitive tape method. ISO - International Organization for Standardization The Impact of Dust on Coating Integrity