ISO 20566-2020 PDF

Full title and description

St ISO 20566-2020 — Official title: "Paints and varnishes — Determination of the scratch resistance of a coating system using a laboratory-scale car-wash". This International Standard specifies a laboratory test method that simulates machine-based car-wash action (rotating brushes and synthetic dirt) to assess the scratch resistance / car-wash resistance of organic paint coatings and, where appropriate, protective plastic films and plastic components.

Abstract

ISO 20566:2020 defines a reproducible test procedure for evaluating the susceptibility of coated surfaces to scratching from car-wash type mechanical action. The method uses a laboratory-scale car-wash simulator with rotating brushes and a synthetic soil to reproduce washing wear under controlled conditions; test parameters are selected to reflect realistic car-wash conditions and can be adapted for different substrates and coating systems. Results support product development, quality control and comparative performance assessment.

General information

• Status: Published / Valid (current published edition).
• Publication date: May 4, 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.020 (Road vehicles — general); 87.040 (Paints and varnishes).
• Edition / version: 3rd edition (ISO 20566:2020), replaces ISO 20566:2013.
• Number of pages: 9 pages.

Scope

The standard applies to organic coating systems applied to substrates used in the automotive sector and other applications where car-wash type mechanical action is relevant. It covers the test apparatus (laboratory-scale car-wash simulator), test materials (synthetic dirt), sample preparation, test conditions and cycles, and criteria for evaluation of scratch damage. The method is intended primarily for painted surfaces but may be adapted to evaluate protective plastic films and plastic components if test parameters are suitably selected.

Key topics and requirements

• Specification of a laboratory-scale car-wash simulator (rotating brush geometry, brush material and mounting).
• Formulation and use of synthetic dirt / soil to reproduce abrasive contaminants encountered in car-washes.
• Sample preparation, mounting and conditioning to ensure repeatable exposure.
• Defined test parameters: brush speed, contact pressure, number of cycles and wash sequence to simulate realistic wear.
• Methods for assessing and scoring scratch damage (visual assessment, photographic records, gloss/appearance measurements where applicable).
• Reporting requirements: test conditions, sample description, results, and any deviations or adaptations from the normative procedure.

Typical use and users

Common users include automotive OEMs and suppliers, paint and coating manufacturers, independent testing and certification laboratories, quality assurance and R&D teams, and material developers. Typical uses are product development and benchmarking, quality control of production batches, supplier verification, and comparative claims support for car-wash or abrasion resistance.

Related standards

ISO 20566:2020 replaces earlier editions of ISO 20566 (2013, 2005). Other standards frequently used alongside it include international and national methods for appearance and degradation assessment (for example standards for gloss measurement and visual evaluation), and related paints-and-varnishes test methods addressing abrasion, adhesion and weathering. Users commonly combine ISO 20566 results with gloss/appearance measurements and degradation evaluation standards to form a complete performance profile.

Keywords

scratch resistance, car-wash resistance, paints and varnishes, coating systems, laboratory-scale car-wash, rotating brush, synthetic dirt, automotive coatings, test method, abrasion, appearance evaluation

FAQ

Q: What is this standard?

A: ISO 20566:2020 is an international test method that specifies how to assess the scratch resistance of coating systems by simulating car-wash mechanical action in a laboratory-scale apparatus.

Q: What does it cover?

A: It covers the test equipment, synthetic soil, sample preparation, test parameters (brush action, speed, pressure, cycles), evaluation procedures and reporting for assessing scratch/car-wash damage on painted surfaces and, where applicable, protective plastic films and plastic components.

Q: Who typically uses it?

A: Automotive manufacturers and suppliers, paint and coating producers, independent test houses, R&D and quality control laboratories use the standard for development, verification and comparative performance testing.

Q: Is it current or superseded?

A: ISO 20566:2020 is the 3rd edition published on May 4, 2020 and replaces the 2013 edition. Standards are subject to periodic review (typically every five years); users who need absolute confirmation of the very latest status or any amendments issued after 2020 should verify with ISO or their national standards body for any actions taken after May 2020.

Q: Is it part of a series?

A: ISO 20566 sits within the suite of ISO standards addressing paints and varnishes and test methods for coating performance. It is not a numbered "series" with sequential parts, but it is used in conjunction with other ISO test methods for appearance, abrasion, adhesion and weathering.

Q: What are the key keywords?

A: Scratch resistance; car-wash; paints and varnishes; laboratory-scale car-wash; rotating brush; synthetic dirt; automotive coatings; test method.