SIST EN 13523-6:2020

Coil coated metals - Test methods - Part 6: Adhesion after indentation (cupping test)

This document defines terms of the procedure for determining the adhesion of an organic coating to a metallic substrate after indentation produced by slow deformation.
The resistance to cracking can also be evaluated.

Bandbeschichtete Metalle - Prüfverfahren - Teil 6: Haftfestigkeit nach Eindrücken (Tiefungsprüfung)

Dieses Dokument legt das Verfahren zum Bestimmen der Haftfestigkeit einer organischen Beschichtung auf einem metallischen Substrat nach Eindrücken bei langsamer Verformung fest.
Die Widerstandsfähigkeit gegen Rissbildung kann auch bewertet werden.

Tôles prélaquées - Méthodes d'essai - Partie 6 : Adhérence après indentation (essai d'emboutissage)

Le présent document décrit le mode opératoire de détermination de l’adhérence d’un revêtement organique sur un subjectile métallique après indentation provoquée par déformation lente.
La résistance à la fissuration peut également être évaluée.

Prevlečene kovine, ki se navijajo - Preskusne metode - 6. del: Oprijem po globljenju (preskus elastičnosti)

General Information

• Status: Published
• Public Enquiry End Date: 01-Aug-2019
• Publication Date: 26-Jul-2020
• ICS: 25.220.60 - Organic coatings
• Technical Committee: IBLP - Paints and varnishes
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Jun-2020
• Due Date: 23-Aug-2020
• Completion Date: 27-Jul-2020
• Ref Project: EN 13523-6:2020 - Coil coated metals - Test methods - Part 6: Adhesion after indentation (cupping test)

Relations

• Replaces: SIST EN 13523-6:2003 - Coil coated metals - Test methods - Part 6: Adhesion after indentation (cupping test)
• Effective Date: 01-Sep-2020

Overview

EN 13523-6:2020 - "Coil coated metals - Test methods - Part 6: Adhesion after indentation (cupping test)" is a CEN standard that defines the procedure for determining coating adhesion after indentation (the cupping test) on coil‑coated metal panels. The test evaluates how an organic coating remains bonded to its metallic substrate following slow deformation and can optionally assess resistance to cracking. This 2020 edition supersedes EN 13523-6:2002 and aligns with EN ISO 1520 cupping test principles.

Key topics and requirements

• Scope and principle: Cross‑hatching the coating then deforming the panel by pressing (cupping) to a specified indentation depth; optional boiling‑water ageing to evaluate effects on adhesion.
• Test apparatus:
  • Cross‑hatching device (single‑bladed knife or purpose‑made cutter for thin films).
  • Pressing device per EN ISO 1520 (specified die, indenter sphere, retaining ring, controlled indenter speed).
  • Ageing vessel for immersion in boiling water (optional, coatings ≥ 60 µm).
  • Tape (transparent pressure‑sensitive tape per EN 60454‑2) and magnifier ×10 for inspection.
• Cutting patterns:
  • Coatings ≥ 60 µm: two cuts each way to form a 5 mm × 5 mm central square.
  • Coatings < 60 µm: at least six cuts each way, 1 mm apart (lattice).
• Procedure:
  • Indentation depth chosen (e.g., ~80% of depth that ruptures substrate) and indenter moved at (12 ± 6) mm/min.
  • Optional ageing immersion time to be agreed prior to test (change from previous edition).
• Assessment and expression of results:
  • ≥ 60 µm: percentage of peeling measured from top to base of dome after attempting to peel strips.
  • < 60 µm: percentage of cross‑hatched squares removed using adhesion tape removal.
  • Cracking: expressed as the indentation depth at which no cracking is observed.
• Test report: must identify the product, reference EN 13523‑6, record indentation depth, ageing details (if used), results, deviations and anomalies, and date.

Applications and users

This standard is used for quality control, product specification and performance verification of coil coated metals. Typical users include:

• Coil coating manufacturers and production laboratories
• Coating formulators and R&D teams
• Third‑party testing laboratories and certification bodies
• Specifiers and purchasers of coated metal for building envelopes, cladding and other industrial applications

EN 13523‑6:2020 helps ensure consistent assessment of coating adhesion after deformation, enabling comparisons between products and verification of durability under mechanical strain.

Related standards

• EN 13523‑0 (general introduction)
• EN ISO 1520 (cupping test)
• EN 23270 (conditioning temperatures/humidities)
• EN 60454‑2 (adhesive tape test methods)
• EN ISO 2409 (cross‑cut test)
• EN 1396, EN 10169 (coil coated metal specifications)

Keywords: EN 13523-6:2020, coil coated metals, cupping test, adhesion after indentation, coating adhesion, cupping test (ISO 1520), coil coating test methods.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2020
Nadomešča:
SIST EN 13523-6:2003
Prevlečene kovine, ki se navijajo - Preskusne metode - 6. del: Oprijem po
globljenju (preskus elastičnosti)
Coil coated metals - Test methods - Part 6: Adhesion after indentation (cupping test)
Bandbeschichtete Metalle - Prüfverfahren - Teil 6: Haftfestigkeit nach Eindrücken
(Tiefungsprüfung)
Tôles prélaquées - Méthodes d'essai - Partie 6 : Adhérence après indentation (essai
d'emboutissage)
Ta slovenski standard je istoveten z: EN 13523-6:2020
ICS:
25.220.60 Organske prevleke Organic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13523-6
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2020
EUROPÄISCHE NORM
ICS 25.220.60 Supersedes EN 13523-6:2002
English Version
Coil coated metals - Test methods - Part 6: Adhesion after
indentation (cupping test)
Tôles prélaquées - Méthodes d'essai - Partie 6 : Bandbeschichtete Metalle - Prüfverfahren - Teil 6:
Adhérence après indentation (essai d'emboutissage) Haftfestigkeit nach Eindrücken (Tiefungsprüfung)
This European Standard was approved by CEN on 3 May 2020.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13523-6:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 5
5 Apparatus and materials . 5
6 Sampling . 6
7 Test panels . 6
8 Procedure. 6
8.1 Ambient conditions . 6
8.2 Cross-hatching (not used for evaluation of resistance to cracking) . 6
8.2.1 For coatings greater than or equal to 60 µm thickness (see Figure 1) . 6
8.2.2 For coatings less than 60 µm thickness (see Figure 2) . 7
8.3 Pressing . 8
8.4 Ageing (optional and only for coatings greater than or equal to 60 µm thickness) . 8
8.5 Assessment of adhesion . 9
8.5.1 For coatings greater than or equal to 60 µm thickness . 9
8.5.2 For coatings less than 60 µm thickness. 9
8.6 Assessment of cracking (optional) . 9
9 Expression of results . 9
9.1 For coatings greater than or equal to 60 µm thickness . 9
9.2 For coatings less than 60 µm thickness. 9
9.3 Cracking . 9
10 Precision . 9
11 Test report . 10
Bibliography . 11

European foreword
This document (EN 13523-6:2020) has been prepared by Technical Committee CEN/TC 139 “Paints and
varnishes”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2020, and conflicting national standards shall be
withdrawn at the latest by December 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13523-6:2002.
The main changes are:
a) the period of ageing has been changed from 1 h to agreement prior to the test (8.4);
b) the time of ageing has been added to the test report;
c) 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 — 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 15: Metamerism
— 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
— 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)
According to the CEN-CENELEC Internal Regulations, the national standards organisations o
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