EN ISO 20567-4:2024 PDF

Name: EN ISO 20567-4:2024 — Paints and varnishes - Determination of stone-chip resistance of coatings - Part 4: Mobile multi-impact testing on a small testing area (ISO 20567-4:2023)
SKU: EN ISO 20567-4:2024
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Paints and varnishes - Determination of stone-chip resistance of coatings - Part 4: Mobile multi-impact testing on a small testing area (ISO 20567-4:2023)

Название (английский):

EN ISO 20567-4:2024

Paints and varnishes - Determination of stone-chip resistance of coatings - Part 4: Mobile multi-impact testing on a small testing area (ISO 20567-4:2023)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 31 января 2024 г.
Издание:: CEN EN 20567 edition 1 version 1
ICS:: 87.040

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Описание (английский):

This document specifies a mobile method for evaluating the resistance of automotive finishes to chilled-iron grit projected onto the surface under test to simulate the effect of stone chipping. Results from the test specified in this document are not comparable with results specified in ISO 20567-1.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 20567-4:2024 (identical to ISO 20567-4:2023) specifies a mobile multi‑impact method to assess the stone‑chip resistance of coatings, particularly automotive finishes. The procedure simulates stone chipping by projecting chilled‑iron grit at 90° onto a small test area using a portable tester. Results from this mobile test are explicitly not comparable with those from ISO 20567‑1 (stationary, large‑area testing).

Key topics and technical requirements

Scope and principle

Evaluates resistance of paints and varnishes to stone chipping using many small, sharp‑edged impacts (chilled‑iron grit).
Damage depends on working pressure, grit characteristics, projection duration and tester design.

Test equipment

Mobile stone‑chip resistance tester with pressure regulator, dosing device and grit magazine.
Projection mask: small testing window (example 20 mm × 20 mm).
Calibration device: pressure plate and scale for functional checks.
Illuminated 10× magnifier with graduated field for inspection.

Compressed air and delivery

Compressed air system with oil/water separators.
Supply requirements noted (e.g., output pressure and hose dimensions referenced in the standard to ensure correct working pressure).
Dosing device designed to deliver chilled‑iron grit in (10 ± 1) s per dose.

Grit specification and lifecycle

Use chilled‑iron grit conforming to ISO 11124‑2; particle size determined by ISO 11125‑2 and ISO 565.
Example particle distribution (per standard): fractions on sieves 2.80 mm (15–20%), 2.50 mm (40–50%), 2.24 mm (30–40%); material through 2.24 mm discarded.
25 g sample should contain 340 ± 20 grit particles.
Grit replacement after a maximum of 25 test runs (i.e., projected 50 times) or at end of the test series.

Procedure and evaluation

Projection at 90°, removal of loose coating fragments, and visual comparison against pictorial reference standards supplied in the standard.
Test report requirements and apparatus functional checks are defined.

Applications and users

Primary users: automotive OEMs, paint formulators, coatings laboratories, quality control teams and test houses needing a portable method to assess stone‑chip resistance on panels, assembled components or in‑field samples.

Practical uses: on‑site evaluation of vehicle finishes, comparative screening of coatings, quality checks after repair or retrofit, and validation of protective topcoats against mechanical impact.

Related standards

ISO 20567‑1 - Stationary stone‑chip resistance testing (results not comparable)

ISO 11124‑2 / ISO 11125‑2 / ISO 565 - Chilled‑iron grit specifications and particle sizing

ISO 2808 - Film thickness measurement

ISO 4618 - Paints and varnishes vocabulary

Keywords: EN ISO 20567-4:2024, ISO 20567-4:2023, stone-chip resistance, mobile multi-impact testing, chilled-iron grit, automotive finishes, paints and varnishes, coating testing.

EN ISO 20567-4:2024 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 20567-4:2023

Paints and varnishes — Determination of stone-chip resistance of coatings — Part 4: Mobile multi-impact testi…

BS EN ISO 20567-1:2017

Paints and varnishes. Determination of stone-chip resistance of coatings. Multi-impact testing.

SIST EN ISO 11124-2:2018

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SIST EN ISO 11125-2:2018

Preparation of steel substrates before application of paints and related products - Test methods for metallic…

ISO 5658-2:2006/Amd 1:2011

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SIST EN ISO 28080:2021

Hardmetals - Abrasion tests for hardmetals (ISO 28080:2021)

SIST EN ISO 4618:2023

Paints and varnishes - Vocabulary (ISO 4618:2023)