EN 13144:2018

SLOVENSKI STANDARD
01-januar-2019
1DGRPHãþD
SIST EN 13144:2003
Kovinske in druge anorganske prevleke - Metoda za kvantitativno merjenje
adhezije z nateznim preskusom
Metallic and other inorganic coatings - Method for quantitative measurement of adhesion
by tensile test
Metallische und andere anorganische Überzüge - Verfahren zur quantitativen Messung
der Haftfestigkeit durch den Zugversuch
Revêtements métalliques et autres revêtements inorganiques - Méthode de mesurage
quantitatif de l'adhérence par essai de traction
Ta slovenski standard je istoveten z: EN 13144:2018
ICS:
25.220.40 Kovinske prevleke Metallic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13144
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2018
EUROPÄISCHE NORM
ICS 25.220.40; 25.220.99 Supersedes EN 13144:2003
English Version
Metallic and other inorganic coatings - Method for
quantitative measurement of adhesion by tensile test
Revêtements métalliques et autres revêtements Metallische und andere anorganische Überzüge -
inorganiques - Méthode de mesurage quantitatif de Verfahren zur quantitativen Messung der Haftfestigkeit
l'adhérence par essai de traction durch den Zugversuch
This European Standard was approved by CEN on 28 September 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13144:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Determination of adhesive strength by measurement. 5
4.1 Principle . 5
4.2 Testing devices . 5
4.3 Adherend preparation . 8
4.4 Adhesives and their application . 8
4.5 Test assemblies . 9
4.6 Measurement . 11
5 Expression of results . 12
5.1 Adhesive strength . 12
5.2 Failure pattern . 12
6 Test report . 14
7 Adhesion appraisal test . 14
Bibliography . 15

European foreword
This document (EN 13144:2018) has been prepared by Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”,
the secretariat of which is held by BSI.
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 May 2019 and conflicting national standards shall be
withdrawn at the latest by May 2019.
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 13144:2003.
In comparison with EN 13144:2003, the following modifications have been made:
— the Scope has been rewritten to give more information;
— normative references have been added;
— the terms and definitions have been updated;
— in addition to the tensile testing machine previously described, the centrifuge has been added as a
further type of testing machine;
— sample description has been expanded to describe test stamps, planar samples and coated samples;
— consideration of adhesives and their application has been expanded;
— the measurement section has been revised;
— the expression of results clause has been revised and failure pattern according to
EN ISO 10365:1995 added;
— the test report clause has been revised.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This document specifies a quantitative method for the measurement of adhesive strength of metallic
and other inorganic coatings applied to metallic, polymer and glass substrates.
Typical coatings for which this document applies are metallic coatings such as aluminium, copper,
nickel, nickel plus chromium, silver, tin, tin-nickel alloys, zinc, gold as well as other inorganic coatings
such as oxides or nitrides, e.g. of aluminium, indium and indium-tin, silicon, niobium, titanium, tungsten,
zirconium and others.
This document does not apply to certain hot dip, spray and mechanical coatings, for which other
standards may apply, e.g. EN ISO 14916 or EN ISO 4624.
The measurement is valid if the cohesion and adhesion properties of the adhesive are higher than those
of the coating subjected to test.
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 15870, Adhesives - Determination of tensile strength of butt joints (ISO 6922:1987 modified)
EN ISO 4624, Paints and varnishes - Pull-off test for adhesion (ISO 4624)
EN ISO 10365:1995, Adhesives - Designation of main failure patterns (ISO 10365:1992)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
adhesive strength
force per unit area required to separate a coating from its substrate
Note 1 to entry: Adhesion can be deemed inadequate in the presence of blisters, scaling and any defect that
results from the separation of the coating from its substrate.
3.2
adhesion
physical property resulting from the magnitude of forces joining the atoms and/or molecules at an
interface of two materials
3.3
cohesion
physical property resulting from the magnitude of forces joining the atoms and/or molecules within
one material
3.4
test block
metallic cylinder used for pull-off tests within the tensile testing machine (described in 4.2.1.2)
3.5
test stamp
metallic disc or cylinder used for pull-off tests within the tensile testing machine (described in 4.2.1.3)
or centrifuge (described in 4.2.2.2)
3.6
substrate
base material to which the coating material is applied or is to be applied
Note 1 to entry: Real substrate from the production process or reference substrate of different material coated
in the production process or test block of steel coated in the production process.
3.7
sample
coating/substrate system under test as used within the tensile testing machine or centrifuge as
counterpart either of test blocks (3.4) or test stamps (3.5)
4 Determination of adhesive strength by measurement
4.1 Principle
The tensile strength required to separate the coating from its substrate is measured perpendicular to
the substrate.
The result of the measurement is influenced not only by the mechanical properties of the system to be
characterized, but also by the nature and preparation of the substrate.
The result of the measurement can also be affected by internal stress in the coating, which influences
adhesion.
The result of the measurement is the tensile strength required to break the weakest interface or the
weakest constituent of the test assembly. A combination of both adhesive and cohesive ruptures can
also occur. A detailed description and designation of failure patterns is provided in 5.2 and in Table 1.
4.2 Testing devices
4.2.1 Tensile testing machine
4.2.1.1 General
A single-sample testing device that requires a two-sided sample clamping and usually a double cardanic
suspension realized by means of ball joints.
It shall be capable of being used in accordance with 4.6. The tensile testing machine is operated either in
the force- or path-controlled mode.
NOTE Suitable set-ups for the application of the tensile force are shown in Figure 1.
a) b)
Key
1 sample
2 adhesive
3 test block (Figure 1a)/test stamp (Figure 1b)
4 sample support
5 ball joint
6 suspension
Figure 1 — Set-ups for the application of the tensile force (tensile testing machine)
4.2.1.2 Test blocks
Test blocks shall be made of machined steel, having a cylindrical shape and a diameter of 20 mm,
10 mm or 7 mm in accordance with EN 15870 and EN ISO 4624 (unless otherwise agreed upon).
The thickness of the test block shall be not less than 10 mm to ensure the absence of deformations
during the test. Prior to use, the faces acting as adherend shall be machined perpendicular to the major
axis of the block.
4.2.1.3 Test stamps
Test stamps may be monolithic or modular. They shall be made of machined steel or other metals. In the
case of monolithic test stamps, clamping body and adherend are one piece made from the same
material. In the case of modular test stamps, clamping body and adherend are separate, but connectable
pieces and can be made from different materials. The adherend diameters shall be 20 mm, 10 mm or
7 mm in accordance with EN 15870 and EN ISO 4624 (unless otherwise agreed upon).
Prior to use, the face acting as adherend shall be machined perpendicular to the major axis of the test
stamp.
4.2.1.4 Planar samples
Coated substrate under consideration with diameters or size above the diameter of the test block or test
stamp. Except for component geometry, the sample represents the interface of coating and substrate as
processed and adhesive strength is tested as shown in set-ups according to Figure 1a) and 1b) and
assemblies of Figures 3 and 4.
4.2.1.5 Coated test blocks
Alternatively to using planar samples (4.2.1.4), it is also possible to coat test blocks (4.2.1.2) and use
them as samples to be tested. Adhesive strength is tested as shown in a set-up according to Figure 1a)
and an assembly according to Figure 5.
4.2.2 Centrifuge
4.2.2.1 General
A multiple-sample testing device for the tensile test that requires a one-sided sample support.
It shall be capable of being used in accordance with 4.6. The centrifuge is operated in the force-
controlled mode.
In combination with the coating/substrate system (acting as planar sample 4.2.2.3) and a monolithic or
modular test stamp bonded on the coating/substrate system, a guiding sleeve acts both as sample
suppo
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