Overview
EN ISO 11125-2:2018 is an internationally recognized standard published by CEN that specifies a test method for determining the particle size distribution of metallic blast-cleaning abrasives by sieving. This standard forms part of the ISO 11125 series, which addresses sampling and testing procedures for metallic abrasives used in blast-cleaning of steel substrates before the application of paints and related coatings. The standard provides essential guidelines to ensure consistent quality and performance of metallic abrasives in surface preparation processes.
Key Topics
EN ISO 11125-2:2018 covers several crucial aspects concerning metallic blast-cleaning abrasives:
- Scope and Application: Focuses solely on the determination of particle size distribution by using sieving techniques, relevant to metallic abrasives for steel surface cleaning.
- Test Apparatus: Specifies laboratory equipment such as balances with 0.1 g accuracy, metal-wire sieves conforming to ISO 565, sieve shakers to provide 3D particle agitation, and sample dividers.
- Sampling Procedure: Details the sampling method including sample size (~120 g), use of a sample divider to obtain representative portions, and duplicate testing to ensure accuracy.
- Sieving Procedure: Instructs on stack arrangement from the largest to smallest mesh sizes, proper agitation time to achieve consistent particle separation, and careful weighing of retained fractions.
- Calculation and Reporting: Defines how to calculate the percentage mass retained on each sieve, precision requirements, and the necessary information to be included in the test report such as product identification, test results, deviations, and operator details.
- Quality Assurance: Highlights the need for regularly calibrated sieves and accurate equipment to minimize variability in test results and recommends exchange of samples or sieves between parties if deviations occur.
Applications
EN ISO 11125-2:2018 is vital for industries involved in steel surface preparation and coating applications including:
- Surface preparation contractors using metallic abrasives for blast-cleaning steel substrates to ensure optimal paint adhesion and long-term durability.
- Abrasive manufacturers and suppliers who must verify and certify the particle size distribution of their products for compliance and performance consistency.
- Paint and coating producers requiring assurance of substrate cleanliness as part of coating system validation.
- Quality control labs and inspection bodies conducting routine testing to confirm abrasive specifications and help prevent coating failures due to improper surface preparation.
By following this standard, all stakeholders can establish uniformity and reliability in the particle size grading of metallic abrasives, directly impacting the efficiency and effectiveness of steel substrate preparation processes.
Related Standards
EN ISO 11125-2:2018 is part of a broader family of standards relating to metallic blast-cleaning abrasives and surface preparation, notably:
- ISO 11124 series - Specifications for types of metallic blast-cleaning abrasives such as chilled-iron grit, high-carbon cast-steel shot, low-carbon cast-steel shot, and cut steel wire.
- Other parts of ISO 11125 - Cover additional test methods for metallic abrasives including sampling, chemical composition, shape, and other physical properties.
- ISO 565:1990 - Defines the nominal sizes and requirements for test sieves used in particle size analysis.
- ISO/IEC Directives - Provide procedural guidance on standard preparation and conformity assessment.
These interconnected standards create a comprehensive framework for ensuring high-quality surface preparation and coating application, adhering to recognized international best practices.
Keywords: EN ISO 11125-2:2018, metallic blast-cleaning abrasives, particle size distribution, sieving test method, steel surface preparation, paint substrate preparation, ISO 11125 series, abrasive testing, quality control for abrasives, paint coating standards.