SIST EN 13523-20:2020

Coil coated metals - Test methods - Part 20: Foam adhesion

This document describes a laboratory method for testing foam adhesion to an organic coating on a metallic substrate under dry and wet conditions.

Bandbeschichtete Metalle - Prüfverfahren - Teil 20: Haftfestigkeit von Schaum

Dieses Dokument legt ein Laborverfahren zum Prüfen der Haftfestigkeit von Schaum auf einer organischen Beschichtung auf einem metallischen Substrat im trockenen und im nassen Zustand fest.

Tôles prélaquées - Méthodes d'essai - Partie 20: Adhérence des mousses

Le présent document décrit une méthode d’essai en laboratoire permettant de déterminer l’adhérence des mousses à un revêtement organique recouvrant un subjectile métallique, dans des conditions sèches et dans des conditions humides.

Prevlečene kovine, ki se navijajo - Preskusne metode - 20. del: Oprijemljivost pene

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 13523-20:2020 - Coil coated metals - Test methods - Part 20: Foam adhesion

Relations

• Replaces: SIST EN 13523-20:2012 - Coil coated metals - Test methods - Part 20: Foam adhesion
• Effective Date: 01-Sep-2020

Overview

EN 13523-20:2020 - "Coil coated metals - Test methods - Part 20: Foam adhesion" is a CEN laboratory test method for assessing the adhesion of foam (e.g., polyurethane (PUR) or polyisocyanurate (PIR)) to an organic coating on metallic substrates. The standard covers both dry adhesion and wet adhesion checks and includes a procedure for assessing non‑adhesion relevant to domestic appliance manufacture. Results are reported as pass/fail for adhesion or as an estimated percentage of remaining foam coverage for non‑adhesion.

Key topics and requirements

• Scope: Laboratory testing of foam adhesion to organic coil coated metals under dry and wet conditions.
• Materials: Typical foam systems (PUR/PIR) produced by mixing polyol and isocyanate components; mixing and handling must follow the foam supplier’s instructions.
• Sample preparation:
  • Cut coated metal samples (~200 × 250 mm).
  • Mix foam components and apply within manufacturer‑specified time (example: 20 g polyol + 26 g isocyanate, mixed ~10 s).
  • Allow polymerisation under ambient conditions (typically 30–40 min or as specified).
• Test procedures:
  • Dry adhesion: manually pull off polymerised foam; if no coating is revealed, additional 24 h conditioning and scraping may be used to confirm “pass”.
  • Wet adhesion: subject a prepared sample to boiling water for 1 h, remove excess water and pull off foam; if necessary, expose a second sample in a humidity cabinet (100% RH at 40 ± 2 °C) for 24 h before testing.
  • Non‑adhesion (domestic appliance products): manual removal and light scraping to confirm whether foam can be removed completely (reported as 0% adhesion if removed).
• Results and reporting:
  • Express results as “pass” or “fail”, indicating the step where failure occurred.
  • For non‑adhesion, report estimated percentage of remaining foam coverage.
  • Include product identification, foam specification, any deviations, anomalies and test date.
• Precision: no precision data currently available.

Practical applications and users

This standard is intended for:

• Coil coating manufacturers and formulators verifying compatibility of organic coatings with insulating foams.
• Sandwich panel and refrigerated appliance producers assessing in‑line foam bonding.
• Quality control and R&D laboratories performing adhesion validation for insulated metal panels, domestic appliance linings, and profiles filled with foam.
• Specification writers and procurement teams who require a reproducible adhesion test method for supplier qualification.

Keywords: EN 13523-20:2020, coil coated metals, foam adhesion, polyurethane foam, adhesion testing, dry adhesion, wet adhesion, humidity cabinet, domestic appliance.

Related standards

• EN 13523-0 (Coil coated metals - General introduction)
• EN 1396 (Aluminium coil coated sheet - Specifications)
• EN 10169 (Continuously organic coated steel - Technical delivery conditions)

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2020
Nadomešča:
SIST EN 13523-20:2012
Prevlečene kovine, ki se navijajo - Preskusne metode - 20. del: Oprijemljivost pene
Coil coated metals - Test methods - Part 20: Foam adhesion
Bandbeschichtete Metalle - Prüfverfahren - Teil 20: Haftfestigkeit von Schaum
Tôles prélaquées - Méthodes d'essai - Partie 20: Adhérence des mousses
Ta slovenski standard je istoveten z: EN 13523-20:2020
ICS:
25.220.60 Organske prevleke Organic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13523-20
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2020
EUROPÄISCHE NORM
ICS 25.220.60 Supersedes EN 13523-20:2011
English Version
Coil coated metals - Test methods - Part 20: Foam
adhesion
Tôles prélaquées - Méthodes d'essai - Partie 20 : Bandbeschichtete Metalle - Prüfverfahren - Teil 20:
Adhérence des mousses Haftfestigkeit von Schaum
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 13523-20:2020 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 Material . 5
6 Apparatus . 5
7 Sampling . 5
8 Test panels . 6
9 Procedure. 6
9.1 Preparation . 6
9.2 Adhesion testing . 6
9.2.1 Dry adhesion . 6
9.2.2 Wet adhesion . 6
9.2.3 Testing non-adhesion in domestic appliance products . 6
10 Expression of results . 6
11 Precision . 7
12 Test report . 7
Bibliography . 8

European foreword
This document (EN 13523-20:2020) 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 13523-20:2011.
The main changes are:
a) testing of non-adhesion in domestic appliance products has been added (9.2.3);
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 — 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: Resistanc
...