EN ISO 20502:2016

SLOVENSKI STANDARD
01-junij-2016
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Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
adhesion of ceramic coatings by scratch testing (ISO 20502:2005 including Cor 1:2009)
Hochleistungskeramik - Bestimmung der Haftung von keramischen Schichten mit dem
Ritztest (ISO 20502:2005 einschließlich Cor 1:2009)
Céramiques techniques - Détermination de l'adhérence des revêtements céramiques par
essai de rayure (ISO 20502:2005 y compris Cor 1:2009)
Ta slovenski standard je istoveten z: EN ISO 20502:2016
ICS:
25.220.99 Druge obdelave in prevleke Other treatments and
coatings
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20502
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2016
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 1071-3:2005
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Determination of adhesion of ceramic coatings
by scratch testing (ISO 20502:2005 including Cor 1:2009)
Céramiques techniques - Détermination de l'adhérence Hochleistungskeramik - Bestimmung der Haftung von
des revêtements céramiques par essai de rayure (ISO keramischen Schichten mit dem Ritztest (ISO
20502:2005, y compris Cor 1:2009) 20502:2005 einschließlich Cor 1:2009)
This European Standard was approved by CEN on 18 March 2016.

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, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20502:2016 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 20502:2005 including Cor 1:2009, has been prepared by Technical Committee
ISO/TC 206 “Fine ceramics” of the International Organization for Standardization (ISO) and has been
taken over as EN ISO 20502:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics”
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 October 2016, and conflicting national standards shall
be withdrawn at the latest by October 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN 1071-3:2005.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 20502:2005 including Cor 1:2009, has been approved by CEN as EN ISO 20502:2016
without any modification.
INTERNATIONAL ISO
STANDARD 20502
First edition
2005-08-15
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Determination of adhesion of ceramic
coatings by scratch testing
Céramiques techniques — Détermination de l'adhérence
des revêtements céramiques par essai de rayure

Reference number
ISO 20502:2005(E)
©
ISO 2005
ISO 20502:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 20502:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Principle. 1
4 Apparatus and materials. 2
4.1 Scratch tester . 2
4.2 Diamond stylus . 2
5 Preparation of test piece. 3
5.1 General requirements. 3
5.2 Surface roughness, waviness and levelling . 3
5.3 Specimen cleaning . 3
5.4 Coating-substrate parameters relevant to a test. 4
6 Test procedure . 4
6.1 General. 4
6.2 Equipment preparation. 4
6.3 Environmental conditions. 5
6.4 Scratching procedure. 5
6.4.1 General. 5
6.4.2 Progressive-force scratch test . 5
6.4.3 Constant-force scratch test . 5
6.4.4 Multi-pass scratch test. 5
6.5 Scratch evaluation and critical normal-force determination. 6
6.5.1 General. 6
6.5.2 Microscope observation . 6
6.5.3 Acoustic emission (AE) and frictional force (FF) recording. 6
7 Repeatability and limits. 7
8 Test report . 7
Annex A (normative) Procedure for calibration of a scratch testing system . 12
Annex B (informative) Typical failure modes obtained in scratch testing . 19
Bibliography . 31

ISO 20502:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20502 was prepared by Technical Committee ISO/TC 206, Fine ceramics.

iv © ISO 2005 – All rights reserved

INTERNATIONAL STANDARD ISO 20502:2005(E)

Fine ceramics (advanced ceramics, advanced technical
ceramics) — Determination of adhesion of ceramic coatings by
scratch testing
1 Scope
This International Standard describes a method of testing ceramic coatings by scratching with a diamond
stylus. During a test, either a constant or increasing force normal to the surface under test is applied to the
stylus so as to promote adhesive and/or cohesive failure of the coating-substrate system. The test method is
suitable for evaluating ceramic coatings up to a thickness of 20 µm and might also be suitable for evaluating
other coating types and thicknesses.
The International Standard is intended for use in the macro (1 to 100 N) force range. The procedures may
also be applicable to other force ranges. However, appropriate calibration is essential if the normal forces at
which failure occurs are to be quantified.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 4288, Geometric Product Specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture
ISO 6508-2, Metallic materials — Rockwell hardness test — Part 2: Verification and calibration of testing
machines (scales A, B, C, D, E, F, G, H, K, N, T)
I
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