SIST EN ISO 17463:2022
(Main)Paints and varnishes - Guidelines for the determination of anticorrosive properties of organic coatings by accelerated cyclic electrochemical technique (ISO 17463:2022)
Paints and varnishes - Guidelines for the determination of anticorrosive properties of organic coatings by accelerated cyclic electrochemical technique (ISO 17463:2022)
This document gives guidelines on how to perform accelerated cyclic electrochemical technique (ACET)
with organic protective coatings on metals.
This document specifies the execution of an ACET test and the considerations relative to the samples
and electrochemical cell, test parameters and procedure.
This document also provides guidelines for the presentation of experimental results such as Bode plots
and relaxation curves and other types of information obtained.
Some typical examples are shown in Annex A.
Beschichtungsstoffe - Leitfaden zur Bestimmung der antikorrosiven Eigenschaften organischer Beschichtungen durch beschleunigte zyklische elektrochemische Verfahren (ISO 17463:2022)
Dieses Dokument gibt Leitlinien, wie beschleunigte zyklische elektrochemische Verfahren (ACET) mit organischen Korrosionsschutzbeschichtungen auf Metallen durchgeführt werden.
Dieses Dokument legt die Ausführung einer ACET-Prüfung und die Überlegungen, die die Proben und die elektrochemische Zelle, Prüfparameter und die Durchführung betreffen, fest.
Dieses Dokument gibt auch Leitlinien für die Darstellung von Versuchsergebnissen wie Bode-Diagramme und Relaxationskurven und anderer Arten erhaltener Daten.
Einige typische Beispiele sind im Anhang A aufgeführt.
Peintures et vernis - Lignes directrices pour la détermination des propriétés anticorrosives de revêtements organiques par une technique électrochimique cyclique accélérée (ISO 17463:2022)
Le présent document contient des lignes directrices sur la mise en œuvre de la technique électrochimique cyclique accélérée (ACET) avec des revêtements organiques de protection anticorrosion sur métaux.
Le présent document spécifie le mode de réalisation d’un essai ACET et les dispositions relatives aux échantillons, à la cellule électrochimique, aux paramètres d’essai et au mode opératoire.
Le présent document fournit également des lignes directrices concernant la présentation des résultats d’essai, par exemple, sous forme de diagrammes de Bode ou de courbes de relaxation, et de tout autre type d’informations obtenues.
Des exemples types sont présentés à l’Annexe A.
Barve in laki - Smernice za ugotavljanje protikorozijskih lastnosti organskih premazov s pospešeno ciklično elektrokemijsko tehniko (ACET) (ISO 17463:2022)
Ta dokument podaja smernice glede izvajanja pospešene ciklične elektrokemijske tehnike (ACET) na organskih zaščitnih premazih na kovinah.
Ta dokument določa izvedbo preskusa pospešene ciklične elektrokemijske tehnike in preučevanje, ki se navezuje na vzorce
in elektrokemijsko celico, parametre preskusa in postopek.
Ta dokument vsebuje tudi smernice za predstavitev eksperimentalnih rezultatov, kot so Bodejevi diagrami
in relaksacijske krivulje ter druge vrste pridobljenih informacij.
Nekateri običajni primeri so prikazani v dodatku A.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 17463:2022
01-september-2022
Nadomešča:
SIST EN ISO 17463:2014
Barve in laki - Smernice za ugotavljanje protikorozijskih lastnosti organskih
premazov s pospešeno ciklično elektrokemijsko tehniko (ACET) (ISO 17463:2022)
Paints and varnishes - Guidelines for the determination of anticorrosive properties of
organic coatings by accelerated cyclic electrochemical technique (ISO 17463:2022)
Beschichtungsstoffe - Leitfaden zur Bestimmung der antikorrosiven Eigenschaften
organischer Beschichtungen durch beschleunigte zyklische elektrochemische Verfahren
(ISO 17463:2022)
Peintures et vernis - Lignes directrices pour la détermination des propriétés
anticorrosives de revêtements organiques par une technique électrochimique cyclique
accélérée (ISO 17463:2022)
Ta slovenski standard je istoveten z: EN ISO 17463:2022
ICS:
25.220.60 Organske prevleke Organic coatings
87.040 Barve in laki Paints and varnishes
SIST EN ISO 17463:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 17463:2022
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SIST EN ISO 17463:2022
EN ISO 17463
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2022
EUROPÄISCHE NORM
ICS 87.040 Supersedes EN ISO 17463:2014
English Version
Paints and varnishes - Guidelines for the determination of
anticorrosive properties of organic coatings by accelerated
cyclic electrochemical technique (ISO 17463:2022)
Peintures et vernis - Lignes directrices pour la Beschichtungsstoffe - Leitfaden zur Bestimmung der
détermination des propriétés anticorrosives de antikorrosiven Eigenschaften organischer
revêtements organiques par une technique Beschichtungen durch beschleunigte zyklische
électrochimique cyclique accélérée (ISO 17463:2022) elektrochemische Verfahren (ISO 17463:2022)
This European Standard was approved by CEN on 17 January 2022.
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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17463:2022 E
worldwide for CEN national Members.
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SIST EN ISO 17463:2022
EN ISO 17463:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 17463:2022
EN ISO 17463:2022 (E)
European foreword
This document (EN ISO 17463:2022) has been prepared by Technical Committee ISO/TC 35 "Paints and
varnishes" in collaboration with 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 July 2022, and conflicting national standards shall be
withdrawn at the latest by July 2022.
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 ISO 17463:2014.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, 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 the
United Kingdom.
Endorsement notice
The text of ISO 17463:2022 has been approved by CEN as EN ISO 17463:2022 without any modification.
3
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SIST EN ISO 17463:2022
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SIST EN ISO 17463:2022
INTERNATIONAL ISO
STANDARD 17463
Second edition
2022-01
Paints and varnishes — Guidelines
for the determination of anticorrosive
properties of organic coatings by
accelerated cyclic electrochemical
technique
Peintures et vernis — Lignes directrices pour la détermination
des propriétés anticorrosives de revêtements organiques par une
technique électrochimique cyclique accélérée
Reference number
ISO 17463:2022(E)
© ISO 2022
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SIST EN ISO 17463:2022
ISO 17463:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2022 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17463:2022
ISO 17463:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 General . 2
4.2 EIS measurement . . 2
4.3 Cathodic polarization . 3
4.4 Potential relaxation . 3
5 Apparatus . 3
6 Specimens. 3
6.1 Samples preparation . 3
6.2 Environmental control . 3
6.3 Number of specimens and repeatability of results . 3
7 Procedure .4
7.1 EIS measurement . . 4
7.2 Cathodic polarization . 4
7.3 Relaxation process . 4
7.4 Number of cycles . 4
8 Data presentation . 4
8.1 Graphics for EIS . 4
8.2 Graphics for the potential relaxation . 5
9 Precision . 5
10 Test report . 5
Annex A (informative) Typical example of results from coatings . 7
Bibliography .14
iii
© ISO 2022 – All rights reserved
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SIST EN ISO 17463:2022
ISO 17463:2022(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 17463:2014), which has been technically
revised.
The main changes are as follows:
— the symbol for the potential has been changed from U to E;
— the specification of instrumental assembly has been deleted from the list in the scope;
— Bode plots and relaxation curves have been added as examples for the presentation of experimental
results in the scope;
— the data presentation has been qualified to equally Nyquist plots in 8.1;
— degradation has been stated more precisely to change in A.2 and A.3;
— the text has been editorially revised and the normative references have been updated.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
© ISO 2022 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17463:2022
ISO 17463:2022(E)
Introduction
This document describes the determination of the anticorrosive properties of organic coatings by
means of the accelerated cyclic electrochemical technique (ACET). The method is based on the so-called
AC/DC/AC procedure. This technique allows comparing the protective and anticorrosive properties
of different coating systems on metal in short times and in a qualitative and quantitative way. ACET
consists of the application of cycles of electrochemical impedance spectroscopy (EIS) measurements,
cathodic polarizations and potential relaxation. Degradation of the coating system is accelerated by the
cathodic polarization. EIS and potential relaxation monitor the change of the coating system induced
by the cathodic polarization. The technique evaluates the permeability of the coating and properties
which can be attributed to adhesion to the substrate.
v
© ISO 2022 – All rights reserved
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SIST EN ISO 17463:2022
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SIST EN ISO 17463:2022
INTERNATIONAL STANDARD ISO 17463:2022(E)
Paints and varnishes — Guidelines for the determination
of anticorrosive properties of organic coatings by
accelerated cyclic electrochemical technique
1 Scope
This document gives guidelines on how to perform accelerated cyclic electrochemical technique (ACET)
with organic protective coatings on metals.
This document specifies the execution of an ACET test and the considerations relative to the samples
and electrochemical cell, test parameters and procedure.
This document also provides guidelines for the presentation of experimental results such as Bode plots
and relaxation curves and other types of information obtained.
Some typical examples are shown in Annex 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.
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 16773-1, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens —
Part 1: Terms and definitions
ISO 16773-2:2016, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic
specimens — Part 2: Collection of data
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16773-1 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
cathodic polarization
change of the electrode potential in the negative direction caused by current flow
[SOURCE
...
SLOVENSKI STANDARD
oSIST prEN ISO 17463:2021
01-junij-2021
Barve in laki - Smernice za ugotavljanje protikorozijskih lastnosti organskih
premazov s pospešeno ciklično elektrokemijsko tehniko (ACET) (ISO/DIS
17463:2021)
Paints and varnishes - Guidelines for the determination of anticorrosive properties of
organic coatings by accelerated cyclic electrochemical technique (ISO/DIS 17463:2021)
Beschichtungsstoffe - Leitfaden zur Bestimmung der antikorrosiven Eigenschaften
organischer Beschichtungen durch beschleunigte zyklische elektrochemische Verfahren
(ISO/DIS 17463:2021)
Peintures et vernis - Lignes directrices pour la détermination des propriétés
anticorrosives de revêtements organiques par une technique électrochimique cyclique
accélérée (ISO/DIS 17463:2021)
Ta slovenski standard je istoveten z: prEN ISO 17463
ICS:
25.220.60 Organske prevleke Organic coatings
87.040 Barve in laki Paints and varnishes
oSIST prEN ISO 17463:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 17463:2021
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oSIST prEN ISO 17463:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17463
ISO/TC 35/SC 9 Secretariat: BSI
Voting begins on: Voting terminates on:
2021-04-07 2021-06-30
Paints and varnishes — Guidelines for the determination
of anticorrosive properties of organic coatings by
accelerated cyclic electrochemical technique
Peintures et vernis — Lignes directrices pour la détermination des propriétés anticorrosives de
revêtements organiques par une technique électrochimique cyclique accélérée
ICS: 87.040
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17463:2021(E)
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. ISO 2021
---------------------- Page: 3 ----------------------
oSIST prEN ISO 17463:2021
ISO/DIS 17463:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 17463:2021
ISO/DIS 17463:2021(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 General . 2
4.2 EIS measurement . 3
4.3 Cathodic polarization . 3
4.4 Potential relaxation . 3
5 Apparatus . 3
6 Specimens . 3
6.1 Samples preparation . 3
6.2 Environmental control . 3
6.3 Number of specimens and repeatability of results . 4
7 Procedure. 4
7.1 EIS measurement . 4
7.2 Cathodic polarization . 4
7.3 Relaxation process . 4
7.4 Number of cycles . 4
8 Data presentation . 5
8.1 Graphics for EIS . 5
8.2 Graphics for the potential relaxation . 5
9 Precision . 5
10 Test report . 5
Annex A (informative) Typical example of results from coatings . 7
Bibliography .14
© ISO 2021 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 17463:2021
ISO/DIS 17463:2021(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee
SC 9, General test methods for paints and varnishes in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 17463:2014), which has been technically
revised. The main changes compared to the previous edition are as follows:
— The symbol for the potential has been changed from U to E;
— the specification of instrumental assembly has been deleted from the list in the scope;
— Bode plots and relaxation curves have been added as examples for the presentation of experimental
results in the scope;
— the data presentation has been qualified to eventually Nyquist plots in 8.1;
— degradation has been stated more precisely to change in A.2 and A.3;
— the text has been editorially revised and the normative references have been updated.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 17463:2021
ISO/DIS 17463:2021(E)
Introduction
This document describes the determination of the anticorrosive properties of organic coatings by
means of the accelerated cyclic electrochemical technique (ACET). The method is based on the so called
AC/DC/AC procedure. This technique allows comparing the protective and anticorrosive properties
of different coating systems on metal in short times and in a qualitative and quantitative way. ACET
consists of the application of cycles of EIS (electrochemical impedance spectroscopy) measurements,
cathodic polarizations and potential relaxation. Degradation of the coating system is accelerated by the
cathodic polarization. EIS and potential relaxation monitor the change of the coating system induced
by the cathodic polarization. The technique evaluates the permeability of the coating and properties
which can be attributed to adhesion to the substrate.
© ISO 2021 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 17463:2021
---------------------- Page: 8 ----------------------
oSIST prEN ISO 17463:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 17463:2021(E)
Paints and varnishes — Guidelines for the determination
of anticorrosive properties of organic coatings by
accelerated cyclic electrochemical technique
1 Scope
This document gives guidelines on how to perform accelerated cyclic electrochemical technique (ACET)
with organic protective coatings on metals.
This document specifies the execution of an ACET test and the considerations relative to the samples
and electrochemical cell, test parameters and procedure.
This document also provides guidelines for the presentation of experimental results such as Bode plots
and relaxation curves and other type of information obtained.
Some typical examples are shown in Annex 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.
ISO 2808, Paints and varnishes — Determination of film thickness
ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities for conditioning
and testing
ISO 16773-1, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens —
Part 1: Terms and definitions
ISO 16773-2:2016, Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic
specimens — Part 2: Collection of data
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16773-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
cathodic polarization
change of the electode potential in the negative direction caused by current flow
[SOURCE: ISO 8044:2020, 7.1.26]
© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 17463:2021
ISO/DIS 17463:2021(E)
3.2
relaxation time
t
relax
time between the cathodic polarization and the beginning of the electrochemical impedance
spectroscopy (EIS) measurement
Note 1 to entry: This value is defined by the operator.
3.3
cathodic disbonding
failure of adhesion between a coating and a metallic surface that is directly attributable to cathodic
reaction conditions and that is often initiated by a defect in the coating system, such as accidental
damage, imperfect application or excessive permeability of the coating
[SOURCE: ISO 15711:2003, 3.1]
3.4
cathodic potential
E
P
potential applied negatively to the open circuit potential E
ocp
4 Principle
4.1 General
The initial state of the coating system is characterized by an electrochemical impedance spectroscopy
(EIS) measurement (EIS – see Figure 1). Then a cathodic polarization (P ) is applied for a certain
n-1 n
period of time (t ) followed by the relaxation process (r ) over the time (t ). Finally the new state
pol n relax
of the coating system is characterized by a second EIS measurement (EIS ). These steps define a cycle
n
which can be repeated n number of times (n is the number of cycles).
NOTE Typically six cycles are used.
Key
X time t
Y potential E
Figure 1 — ACET cycle
2 © ISO 2021 – All rights reserved
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oSIST prEN ISO 174
...
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