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EVS-EN 13523-14:2023

Coil coated metals - Test methods - Part 14: Chalking (Helmen method)

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Kehtiv alates 03.04.2023
Alusdokumendid
EN 13523-14:2023
Tegevusala (ICS grupid)
25.220.60 Orgaanilised pinded
Direktiivid või määrused
puuduvad

Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
03.04.2023
Põhitekst
04.08.2014
Põhitekst
This document describes the procedure for determining objectively the chalking resulting from natural or artificial weathering of an organic coating on a metallic substrate.
The advantage of this procedure for measuring chalking of an organic coating is that the result can be read off immediately on an instrument. Subjective judgement by visual comparison of test specimens with reference specimens is not necessary.
Reproducible results can only be obtained by careful execution of the test. Special attention is paid to the adhesive tape and its application to the test surface.
The test method is not applicable to embossed coatings. In the case of textured coatings, the degree of texture will influence readings. Also, dirt collection can influence readings on outdoor weathered specimens.
NOTE  Different methods for assessing chalking are in use. The results of these different methods are not comparable.

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