preface
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ISO 20567-2-2017 “Paints and varnishes — Determination of rock percussion resistance — Part 2: Single impact test with guided impact body”

The committee responsible for this document is ISO/TC 35, Paints and Varnishes, Subcommittee SC 9, Common Test Methods for Paints and Varnishes.

The second edition cancelled and replaced the first edition (ISO 20567-2:2005), which was technically revised with the following major changes:

– Specifications are added when the equipment is calibrated;

— The reference to optical imaging was removed;

— the clause on sampling was deleted;

– The description of the appropriate method of removing loose paint has been transferred to the information annex as an example, and the adhesive strength of the tape is no longer specified for the method of using tape;

— Made some minor corrections;

– This document has been edited and revised, and the normative references have been updated.

A list of all the parts in the ISO 20567 series can be found on the ISO website.

introduce
In the automobile industry, multiple layers of paint are applied to the body for protection. Gravel, road metals, and other materials can damage these coatings, causing individual layers to peel off or the entire coating to layer off the substrate.

Stone chips can be simulated by single impact and/or multiple impact tests. ISO 20567-1 describes multiple impact testing; ISO 20567-2 and ISO 20567-3 describe a single impact test.

ISO 20567-2-2017 “Paints and varnishes — Determination of rock percussion resistance — Part 2: Single impact test with guided impact body”

1 range
This document specifies a method for assessing the impact resistance of automotive finishes and other coatings to a wedge body projected onto the surface under test to simulate the impact of stone.

2 Normative references

The following files are referenced in the text in such a way that some or all of the content constitutes the requirements of this document. For dated references, citation-only versions apply. For undated references, the new version of the reference (including any revisions) applies.

ISO 1514, Paints and varnishes — Standard panels for testing

ISO 2808, Paints and varnishes – determination of film thickness

ISO 3270, Paints and varnishes and their Raw materials – Regulate and test temperature and humidity

EN 573-3, aluminium and aluminium alloys – Chemical composition and forms of wrought products – Part 3: Chemical composition and forms of products

3 Terms and Definitions
No terms and definitions are listed in this document.

ISO and IEC maintain databases of terms for standardization at the following addresses:

— IEC electronic encyclopedia: available at electropedia.org/

– ISO online browsing platform: http://iso.org/obp