EN 13523-1:2024

SLOVENSKI STANDARD
oSIST prEN 13523-1:2023
01-september-2023
Prevlečene kovine, ki se navijajo - Preskusne metode - 1. del: Debelina premaza
Coil coated metals - Test methods - Part 1: Film thickness
Bandbeschichtete Metalle - Prüfverfahren - Teil 1: Schichtdicke
Tôles prélaquées - Méthodes d'essai - Partie 1 : Épaisseur du revêtement
Ta slovenski standard je istoveten z: prEN 13523-1
ICS:
17.040.20 Lastnosti površin Properties of surfaces
25.220.60 Organske prevleke Organic coatings
oSIST prEN 13523-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 13523-1:2023
oSIST prEN 13523-1:2023
DRAFT
EUROPEAN STANDARD
prEN 13523-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2023
ICS 25.220.60; 17.040.20 Will supersede EN 13523-1:2017
English Version
Coil coated metals - Test methods - Part 1: Film thickness
Tôles prélaquées - Méthodes d'essai - Partie 1 : Bandbeschichtete Metalle - Prüfverfahren - Teil 1:
Épaisseur du revêtement Schichtdicke
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 139.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13523-1:2023 E
worldwide for CEN national Members.

oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
4.1 Method A: Measurement on magnetic substrate – magnetic induction . 6
4.2 Method B: Measurement on a non-magnetic substrate – eddy current . 6
4.3 Method C: Measurement on all substrates – micrometer method . 6
4.4 Method D: Measurement on all substrates – optical method . 6
4.5 Method E: Measurement on all substrates – ruggedized optical interference (ROI) . 6
5 Apparatus and materials . 6
6 Sampling . 6
7 Test panels . 7
8 Procedure . 7
8.1 Calibration . 7
8.1.1 General. 7
8.1.2 Calibration standards . 7
8.2 Scale rating . 7
8.3 Measurement . 7
8.3.1 Ambient conditions . 7
8.3.2 Number of measurements . 7
8.3.3 Method A: Magnetic induction . 8
8.3.4 Method B: Eddy current . 8
8.3.5 Method C: Micrometer method . 8
8.3.6 Method D: Optical method . 9
8.3.7 Method E: Ruggedized optical interference (ROI) . 9
9 Expression of results . 10
10 Accuracy . 10
11 Test report . 10
Bibliography . 11
oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
European foreword
This document (prEN 13523-1:2023) has been prepared by Technical Committee CEN/TC 139 “Paints
and varnishes”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13523-1:2017.
In comparison with the previous edition, the following technical modifications have been made:
a) ruggedized optical interference (ROI) has been added as method E;
b) the text has been editorially revised and the normative references have been updated.
The EN 13523 series, Coil coated metals — Test methods, consists of the following parts:
— Part 0: General introduction
— Part 1: Film thickness
— Part 2: Gloss
— Part 3: Colour difference and metamerism — Instrumental comparison
— Part 4: Pencil hardness
— Part 5: Resistance to rapid deformation (impact test)
— Part 6: Adhesion after indentation (cupping test)
— Part 7: Resistance to cracking on bending (T-bend test)
— Part 8: Resistance to salt spray (fog)
— Part 9: Resistance to water immersion
— Part 10: Resistance to fluorescent UV radiation and water condensation
— Part 11: Resistance to solvents (rubbing test)
— Part 12: Resistance to scratching
— Part 13: Resistance to accelerated ageing by the use of heat
— Part 14: Chalking (Helmen method)
— Part 16: Resistance to abrasion
— Part 17: Adhesion of strippable films
— Part 18: Resistance to staining
— Part 19: Panel design and method of atmospheric exposure testing
oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
— Part 20: Foam adhesion
— Part 21: Evaluation of outdoor exposed panels
— Part 22: Colour difference — Visual comparison
— Part 23: Resistance to humid atmospheres containing sulfur dioxide
— Part 24: Resistance to blocking and pressure marking
— Part 25: Resistance to humidity
— Part 26: Resistance to condensation of water
— Part 27: Resistance to humid poultice (Cataplasm test)
— Part 29: Resistance to environmental soiling (Dirt pick-up and striping)
oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
1 Scope
This document specifies the procedures for determining the dry-film thickness of an organic coating on
a metallic substrate (coil coating).
Five appropriate methods are given in this document:
a) magnetic induction;
b) eddy current;
c) micrometer;
d) optical;
e) ruggedized optical interference.
The methods are applicable only to products with smooth and flat substrates, but the coating itself can
be textured. In that case, for methods a) and b), the average of a series of readings will represent an
average of the thickness of the organic coating, while method c) will give the maximum thickness, method
d) can provide the minimum, maximum and average thickness, and e) will give the total thickness.
Non-destructive continuous-web methods on measurement of dry-film thickness are only applicable on
method a).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13523-0:2021, Coil coated metals — Test methods — Part 0: General introduction
EN 23270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning
and testing (ISO 3270)
EN ISO 3611, Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers
for external measurements — Design and metrological characteristics (ISO 3611)
ASTM D8331, Standard Test Method for Measurement of Film Thickness of Thin-Film Coatings by Non-
Destructive Means Using Ruggedized Optical Interference
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 13523-0 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
film thickness
distance between the surface of the film and the surface of the substrate
[SOURCE: EN ISO 2808:2019, 3.1]
oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
4 Principle
4.1 Method A: Measurement on magnetic substrate – magnetic induction
The film thickness on a magnetic substrate is determined by means of an electromagnetic probe placed
on the coating and developing an electromagnetic field. The variation of this field is a function of the
distance between the probe and the substrate. This signal is measured and converted to the film thickness
reading.
4.2 Method B: Measurement on a non-magnetic substrate – eddy current
The film thickness on a non-magnetic conductive substrate is determined by means of an electromagnetic
probe placed on the coating and generating eddy currents in the substrate. The magnitude of the eddy
currents is a function of the distance between the probe and the substrate. This measuring signal is
derived from the impedance change in the probe and converted to the film thickness reading.
4.3 Method C: Measurement on all substrates – micrometer method
The film thickness is determined by measuring the coated sample and then removing the organic coating
and re-measuring the sample minus the coating or by measuring a film of organic coating that has been
removed from the sample.
4.4 Method D: Measurement on all substrates – optical method
The film thickness is determined by microscopical measurement of a section cut through the film. The
defined cut may be made in the coating using a special blade (symmetrical cut), a special paint borer
(conical bore) or a milling tool (sloping cut).
4.5 Method E: Measurement on all substrates – ruggedized optical interference (ROI)
The film thickness on a non-magnetic conductive substrate is determined by means of non-contact, ROI
technology which measures multi-layer coatings and thin film thicknesses down to sub-micron levels.
5 Apparatus and materials
5.1 Instruments for measuring film thickness, using the principles described in Clause 4.
5.2 Solvent, suitable for removing organic coatings, for example methyl ethyl ketone (2-butanone).
5.3 Suitable abrasive and/or blunt knife or other means of removing softened organic coatings that
do not damage the substrate.
5.4 Cutting tool, for Method D.
5.4.1 Blade, for making a symmetrical cut in the coating.
5.4.2 Paint borer, for making a conical bore in the coating.
5.4.3 Milling tool, for making a sloping cut in the coating.
6 Sampling
Shall be in accordance with EN 13523-0.
oSIST prEN 13523-1:2023
prEN 13523-1:2023 (E)
7 Test panels
Shall be in accordance with EN 13523-0.
8 Procedure
8.1 Calibration
8.1.1 General
For the measurement, the instructions of the manufacturer of the instrument shall be taken into account,
in particular regarding the calibration and/or setting up procedure.
Before use, calibrate each instrument in accordance with the manufacturer's instructions using
calibration standards. For instruments that can
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