Overview
EN ISO 7784-3:2022 - Paints and varnishes - Determination of resistance to abrasion - Part 3: Method with abrasive‑paper covered wheel and linearly reciprocating test specimen (ISO 7784-3:2022) specifies a laboratory test method to assess the abrasion resistance of coating systems. The method uses a loaded, rigid wheel covered with abrasive paper that acts on a test panel moving in a linear reciprocating (back-and‑forth) motion. The standard is part of the ISO 7784 series and was adopted by CEN as EN ISO 7784-3:2022.
Key topics and requirements
- Test principle: A rigid, abrasive‑paper covered wheel is pressed onto the coated panel while the panel reciprocates linearly; abrasion is quantified by measuring material loss.
- Apparatus and materials: Requirements cover the abrasive wheel, abrasive paper, loading mechanism, and fixtures to ensure consistent contact and stroke control.
- Test specimens: Preparation, film thickness measurement, and conditioning of panels are specified (references include ISO 1514, ISO 2808, ISO 3270, ISO 4618).
- Test procedure: Includes agreements between parties, wheel preparation, pre-test and main test procedures, defined test conditions (environmental and mechanical), and the required number of determinations.
- Evaluation: Main-test results are evaluated as loss in mass and converted into a measure of abrasion resistance; guidance on reporting is provided.
- Precision: The standard provides repeatability and reproducibility framework and precision information derived from interlaboratory data.
- Test report: Mandatory test-report items include identification of the coating, specimen preparation, test conditions, test results, and any deviations.
Practical applications
- Quality control and batch verification of paints, varnishes and protective coatings.
- Comparative performance testing during product development and formulation optimization.
- Specification compliance and contractual testing for coatings used in industrial, automotive, marine, architectural and protective applications.
- Failure analysis where wear and abrasive performance affect service life.
Who uses this standard
- Coating and raw‑material manufacturers (R&D and QC labs)
- Independent testing and certification laboratories
- Specifiers, procurement and quality assurance teams in industries that require durable coatings
- Standardization bodies and consultants preparing test programs and technical specifications
Related standards
- ISO 7784 series (Parts 1 and 2) - alternative abrasive‑wheel methods
- ISO 1514 - Standard panels for testing
- ISO 2808 - Film thickness measurement
- ISO 3270 - Conditioning and testing climates
- ISO 4618 - Terms and definitions
Keywords: EN ISO 7784-3:2022, abrasion resistance, paints and varnishes, abrasive-paper covered wheel, linearly reciprocating test specimen, coating abrasion test, ISO 7784-3.
