Overview
EN ISO 7784-1:2023 - Paints and varnishes - Determination of resistance to abrasion - Part 1 describes a standardized laboratory method to measure the abrasion resistance of coating films. The test uses two loaded, freely rotatable abrasive‑paper covered wheels that abrade an eccentrically rotating test specimen on a turntable. The method is the European adoption of ISO 7784-1:2023 and supersedes the 2016 edition.
Key topics and requirements
- Test principle: Two rubber wheels covered with agreed abrasive paper press onto a rotating specimen; eccentric wheel axes produce a ring-shaped crosswise wear zone. Mass loss of the coating after a set number of cycles is determined.
- Apparatus: Turntable abrasion tester with two pivoting arms and mandrels using ball bearings for low‑friction rotation. A suction device is required to remove abrasive dust.
- Typical parameters given: turntable speed (60 ± 2) min⁻¹; wheel offset (19.05 ± 0.3) mm; wear zone ≈ 13 mm wide; suction distance (3 ± 1) mm. Number of cycles and test load are agreed between parties or specified in test conditions.
- Test specimens & preparation: References for standard panels, film thickness measurement and conditioning are specified; film thickness and conditioning influence results and must follow normative references.
- Abrasive materials: Uses abrasive‑paper covered rubber wheels in accordance with FEPA grain standards for coated abrasives.
- Evaluation & reporting: Loss of mass (abrasive wear) is measured; the standard includes guidance on precision, number of determinations and required test report content.
Applications and who uses it
EN ISO 7784-1:2023 is used by:
- Coatings manufacturers for product development and quality control of decorative, protective and industrial coatings.
- Automotive and aerospace suppliers for comparative wear testing of topcoats and clearcoats.
- Independent test laboratories and certification bodies conducting standardized abrasion resistance testing.
- Specifiers and procurement teams requiring reproducible abrasion data for material selection and performance claims.
Typical applications include routine QC checks, formulation optimization, benchmark comparisons between products, and verification of abrasion resistance for service conditions.
Related standards
- ISO 7784 series (other parts: ISO 7784-2, ISO 7784-3) - alternative abrasive wheel methods
- ISO 1514 - Standard panels for testing
- ISO 2808 - Determination of film thickness
- ISO 3270 - Temperatures and humidities for conditioning and testing
- ISO 4618 - Terms and definitions for paints and varnishes
- ISO 48-4 / ISO 48-5 - Rubber hardness methods
- FEPA Standards 43‑1 / 43‑2 - Coated abrasive grain grades
EN ISO 7784-1:2023 provides a repeatable, well‑documented method for assessing coating abrasion resistance using abrasive‑paper covered wheels and is essential for labs and manufacturers needing standardized abrasion performance data.
