SIST EN ISO 12696:2022
(Main)Cathodic protection of steel in concrete (ISO 12696:2022)
Cathodic protection of steel in concrete (ISO 12696:2022)
This document specifies performance requirements for cathodic protection of steel in cement-based
concrete, in both new and existing structures. It covers building and civil engineering structures,
including carbon steel reinforcement and prestressed reinforcement embedded in the concrete. It is
applicable to uncoated steel reinforcement and to organic-coated steel reinforcement. It is not applicable
to reinforced concrete containing electrically conductive fibres (e.g. carbon or steel).
This document applies to steel embedded in atmospherically exposed, buried, immersed and tidal
elements of buildings or structures.
This document is only applicable to the applications of cathodic protection to steel in concrete which
are designed with the intention to, and can be demonstrated to, meet the criteria of protection specified
in 8.6. This requires the provision of sufficient performance monitoring systems as specified in 6.3 to
all parts of the structure intended to be protected, in order to assess the extent to which the criteria in
8.6 are met.
This document does not apply to galvanic anodes or systems applied into patch repairs to reduce the
effects of ‘incipient anodes’. This document does also not apply to any form of cathodic protection
systems or other electrochemical treatments that either cannot meet the requirements of 8.6 or are not
provided with the performance monitoring systems (see 6.3) that are necessary to assess whether the
criteria of protection specified in 8.6 are met.
NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete.
NOTE 2 This document, while not specifically intended to address cathodic protection of steel in any
electrolyte except concrete, can be applied to cathodic protection of steel in other cementitious materials such as
are found, for example, in early 20th century steel-framed masonry, brick and terracotta clad buildings. In such
applications, additional considerations specific to these structures are required in respect of design, materials
and installation of cathodic protection; however, the requirements of this document can be applied to these
systems
Kathodischer Korrosionsschutz von Stahl in Beton (ISO 12696:2022)
Dieses Dokument legt Leistungsanforderungen an den kathodischen Korrosionsschutz von Stahl in Beton auf Zementbasis sowohl in neuen als auch bestehenden Bauwerken fest. Es umfasst Gebäude und Ingenieurbauwerke, einschließlich in Beton eingebetteter nicht vorgespannter und vorgespannter Bewehrung aus Kohlenstoffstahl. Es ist anwendbar auf unbeschichteten und auf organisch beschichteten Bewehrungsstahl. Es ist nicht anzuwenden für bewehrten Beton, der elektrisch leitfähige Fasern (z. B. Kohlenstoff oder Stahl) enthält.
Dieses Dokument gilt für Stahl, der in Bauteile von Gebäuden oder Bauwerken eingebettet ist, die der Luft ausgesetzt, erdverlegt oder unter Wasser befindlich oder durch Gezeiten beeinflusst sind.
Dieses Dokument ist nur anzuwenden für die Anwendungen des kathodischen Korrosionsschutzes von Stahl in Beton, die mit dem Ziel der Einhaltung der in 8.6 festgelegten Korrosionsschutzkriterien entwickelt wurden und bei denen die Einhaltung dieser Kriterien nachgewiesen werden kann. Hierfür ist die Bereitstellung von ausreichenden Leistungsüberwachungssystemen, wie in 6.3 festgelegt, an allen Teilen des zu schützenden Bauwerks erforderlich, um den Grad, bis zu dem die in 8.6 festgelegten Kriterien erfüllt werden, beurteilen zu können.
Dieses Dokument ist nicht anzuwenden für galvanische Anoden oder Systeme, die zur Minderung des „Anodeneinleitungseffekts“ in Ausbesserungen eingebracht werden. Dieses Dokument ist auch nicht anzuwenden für alle Formen von kathodischen Korrosionsschutzsystemen oder sonstigen elektrochemischen Behandlungen, die entweder die Anforderungen nach 8.6 nicht erfüllen können oder nicht mit den Leistungsüberwachungssystemen ausgestattet sind (siehe 6.3), die zur Beurteilung, ob die in 8.6 festgelegten Schutzkriterien erfüllt werden, notwendig sind.
ANMERKUNG 1 Anhang A enthält Leitlinien zu den Grundsätzen des kathodischen Korrosionsschutzes und dessen Anwendung auf Stahl in Beton.
ANMERKUNG 2 Dieses Dokument, das zwar nicht speziell für den kathodischen Schutz von Stahl in irgendeinem Elektrolyten, ausgenommen Beton, vorgesehen ist, kann für den kathodischen Schutz von Stahl in anderen zementartigen Werkstoffen, wie sie z. B. bei in Stahlrahmen eingesetztem Mauerwerk, Bausteinen und mit Terrakotta verkleideten Bauwerken aus dem frühen 20. Jahrhundert zu finden sind, angewendet werden. Bei derartigen Anwendungen sind zusätzliche Überlegungen für diese Bauwerke hinsichtlich Ausführung, Werkstoffen und Einbau des kathodischen Schutzes erforderlich; die Anforderungen des vorliegenden Dokumentes können jedoch auf diese Systeme angewendet werden.
Protection cathodique de l’acier dans le béton (ISO 12696:2022)
Le présent document spécifie les exigences de performance pour la protection cathodique de l’acier dans le béton à base de ciment, pour les structures nouvelles comme pour les structures existantes. Il traite des bâtiments et des ouvrages d’art, y compris les armatures et les précontraintes en acier au carbone noyées dans le béton. Il s’applique aux armatures en acier non revêtu et aux armatures en acier recouvert par un revêtement organique. Il ne s’applique pas au béton renforcé comportant des fibres conductrices d’électricité (par exemple, le carbone ou l’acier).
Le présent document s’applique à l’acier noyé dans des éléments de bâtiments ou de structures qui sont exposés à l’atmosphère, enterrés, immergés ou soumis à la marée.
Le présent document s’applique uniquement aux applications de protection cathodique de l’acier dans le béton qui sont conçues dans l’intention de répondre aux critères de protection spécifiés en 8.6 et dont il peut être démontré qu’elles y répondent. Cela requiert la mise en place de systèmes de surveillance de la performance suffisants, tels que spécifiés en 6.3, pour toutes les parties de la structure destinées à être protégées, afin d’évaluer dans quelle mesure les critères en 8.6 sont satisfaits.
Le présent document ne s’applique pas aux anodes galvaniques ou ensembles appliqués dans les réparations ragréées pour réduire les effets d’« anodes induites ». Le présent document ne s’applique également pas à toutes formes d’installations de protection cathodique ou d’autres traitements électrochimiques qui soit ne peuvent pas répondre aux exigences de 8.6, soit ne sont pas équipées des systèmes de surveillance de la performance (voir 6.3) nécessaires pour évaluer si les critères de protection spécifiés en 8.6 sont satisfaits.
NOTE 1 L’Annexe A fournit des recommandations relatives aux principes de la protection cathodique et à son application à l’acier dans le béton.
NOTE 2 Bien qu’il ne soit pas spécifiquement destiné à traiter de la protection cathodique de l’acier dans n’importe quel autre électrolyte que le béton, le présent document peut s’appliquer à la protection cathodique de l’acier dans d’autres matériaux à base de ciment tels que ceux rencontrés, par exemple, dans les bâtiments à charpente d’acier du début du XXe siècle à parement de maçonnerie, de brique et de terre cuite. Dans de telles applications, des considérations supplémentaires spécifiques à ces structures sont à prendre en compte en ce qui concerne la conception, les matériaux et la mise en place de la protection cathodique ; cependant, les exigences du présent document peuvent être appliquées à ces systèmes.
Katodna zaščita jekla v betonu (ISO 12696:2022)
Ta dokument določa zahteve glede učinkovitosti za katodno zaščito jekla v betonu na osnovi cementa v novih in obstoječih objektih. Zajema stavbe in gradbene inženirske objekte, vključno z armaturo iz ogljikovega jekla in prednapeto armaturo v betonu. Uporablja se za neprevlečeno jekleno armaturo in organsko prevlečeno jekleno armaturo. Ne uporablja se za armirani beton, ki vsebuje električno prevodna vlakna (npr. ogljikova ali jeklena). Ta dokument se uporablja za jeklo v ozračju izpostavljenih, zakopanih, potopljenih in plimnih elementih stavb ali zgradb. Ta dokument se uporablja samo za aplikacije katodne zaščite za jeklo v betonu, ki so namensko zasnovane za izpolnjevanje meril za zaščito, določenih v točki 8.6, kar je mogoče tudi dokazati. Za ta namen je treba zagotoviti ustrezne sisteme za spremljanje delovanja, kot so določeni v točki 6.3, in sicer za vse dele konstrukcije, ki morajo biti zaščiteni, da se oceni obseg, v katerem so izpolnjena merila iz točke 8.6. Ta dokument se ne uporablja za galvanske anode ali sisteme, ki se uporabljajo pri lokalnih popravilih za zmanjšanje učinka »začetnih anod«. Ta dokument se prav tako ne uporablja za sisteme katodne zaščite v kakršni koli obliki ali druge elektrokemične obdelave, ki bodisi ne morejo izpolnjevati zahtev iz točke 8.6 ali se ne zagotavljajo skupaj s sistemi za spremljanje delovanja (glej točko 6.3), ki so potrebni za ocenjevanje, ali so izpolnjena merila za zaščito, določena v točki 8.6. OPOMBA 1: Dodatek A podaja smernice o načelih katodne zaščite in njeni uporabi za jeklo v betonu. OPOMBA 2: Ta dokument, ki sicer ne obravnava posebej katodne zaščite jekla v katerem koli elektrolitu razen betona, se lahko uporablja za katodno zaščito jekla v drugih cementnih materialih, ki so lahko prisotni na primer v stavbah iz zgodnjega 20. stoletja, izdelanih iz zidakov z jeklenim ogrodjem, opek in terakote. Pri takih vrstah uporabe so potrebni dodatni premisleki, posebej namenjeni tem strukturam, v zvezi z načrtovanjem, materiali in namestitvijo katodne zaščite, vendar se lahko zahteve iz tega dokumenta uporabljajo za te sisteme.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12696:2022
01-julij-2022
Nadomešča:
SIST EN ISO 12696:2017
Katodna zaščita jekla v betonu (ISO 12696:2022)
Cathodic protection of steel in concrete (ISO 12696:2022)
Kathodischer Korrosionsschutz von Stahl in Beton (ISO 12696:2022)
Protection cathodique de l’acier dans le béton (ISO 12696:2022)
Ta slovenski standard je istoveten z: EN ISO 12696:2022
ICS:
77.060 Korozija kovin Corrosion of metals
77.140.15 Jekla za armiranje betona Steels for reinforcement of
concrete
91.080.40 Betonske konstrukcije Concrete structures
SIST EN ISO 12696:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12696:2022
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SIST EN ISO 12696:2022
EN ISO 12696
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2022
EUROPÄISCHE NORM
ICS 77.060; 77.140.15 Supersedes EN ISO 12696:2016
English Version
Cathodic protection of steel in concrete (ISO 12696:2022)
Protection cathodique de l'acier dans le béton (ISO Kathodischer Korrosionsschutz von Stahl in Beton (ISO
12696:2022) 12696:2022)
This European Standard was approved by CEN on 5 May 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 12696:2022 E
worldwide for CEN national Members.
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SIST EN ISO 12696:2022
EN ISO 12696:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 12696:2022
EN ISO 12696:2022 (E)
European foreword
This document (EN ISO 12696:2022) has been prepared by Technical Committee ISO/TC 156
"Corrosion of metals and alloys" in collaboration with Technical Committee CEN/TC 219 “Cathodic
protection” 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 November 2022, and conflicting national standards
shall be withdrawn at the latest by November 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 12696:2016.
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 12696:2022 has been approved by CEN as EN ISO 12696:2022 without any modification.
3
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SIST EN ISO 12696:2022
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SIST EN ISO 12696:2022
INTERNATIONAL ISO
STANDARD 12696
Third edition
2022-05
Cathodic protection of steel in
concrete
Protection cathodique de l'acier dans le béton
Reference number
ISO 12696:2022(E)
© ISO 2022
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SIST EN ISO 12696:2022
ISO 12696:2022(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
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© ISO 2022 – All rights reserved
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SIST EN ISO 12696:2022
ISO 12696:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 3
4.1 Quality management . 3
4.2 Persons . 3
4.3 Design . 3
5 Structure assessment and repair . 4
5.1 General . 4
5.2 Records . 4
5.3 Visual inspection and delamination survey . 4
5.4 Chloride analysis . 4
5.5 Carbonation depth measurement . 4
5.6 Concrete cover and reinforcement location . 5
5.7 Reinforcement electrical continuity. 5
5.8 Steel/concrete potential . 5
5.9 Concrete electrical resistivity . 5
5.10 Repair. 6
5.10.1 General . 6
5.10.2 Concrete removal . 6
5.10.3 Reinforcement preparation . 6
5.10.4 Concrete reinstatement . 6
5.11 Cementitious overlay . 7
5.12 New structures . 7
6 Cathodic protection system components . 8
6.1 General . 8
6.2 Anode systems . 8
6.2.1 General . 8
6.2.2 Conductive coating anode systems . 9
6.2.3 Activated titanium anode systems . 10
6.2.4 Titania ceramic anodes . 11
6.2.5 Conductive cementitious anodes . 11
6.2.6 Embedded galvanic anodes . 11
6.2.7 Surface-mounted galvanic anodes.12
6.2.8 Buried and immersed anodes .12
6 . 3 Mon it or i n g s en s or s . 14
6.3.1 General . 14
6.3.2 Portable reference electrodes . 15
6.3.3 Other sensors .15
6.4 M onitoring instrumentation . 16
6.4.1 General . 16
6.4.2 Digital meters . . 16
6.4.3 Data loggers . 16
6.5 Data management system . 17
6.6 Direct current cables. 18
6.7 Junction boxes . 19
6.8 Power supplies . 19
6.9 Transformer-rectifiers . 19
7 Installation procedures .21
7.1 Electrical continuity . 21
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SIST EN ISO 12696:2022
ISO 12696:2022(E)
7.2 Performance monitoring system . 21
7.3 Connections to steel in concrete . 22
7.4 Concrete repairs associated with the cathodic protection components .22
7.5 Surface preparation for anode installation . 22
7.6 Anode installation . 23
7.7 Connections to the anode system . 23
7.8 Anode overlay, surface sealant or decorative coating application .23
7.9 Electrical installation . 24
7.10 Testing during installation .25
8 Commissioning.25
8.1 Visual inspection . 25
8.2 Pre-energizing measurements .25
8.3 Initial energizing of impressed current systems . 26
8.4 Initial adjustment of impressed current systems . 26
8.5 Initial performance assessment . 27
8.6 Criteria of protection: Interpretation of performance assessment data .28
9 System records and documentation .29
9.1 Quality and test records . .29
9.2 Installation and commissioning report .29
9.3 Operation and maintenance manual . 30
10 Operation and maintenance .30
10.1 Intervals and procedures . 30
10.2 System review . 31
10.3 System review report . 31
Annex A (informative) Principles of cathodic protection and its application to steel in
concrete .32
Annex B (informative) Design process .40
Annex C (informative) Notes on anode systems .47
Annex D (informative) Notes on reference electrodes .52
Bibliography .56
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SIST EN ISO 12696:2022
ISO 12696:2022(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 156, Corrosion of metals and alloys, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC
219, Cathodic protection of steel in concrete, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 12696:2016), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the scope has been revised to clarify that, in order to comply with this document, it is necessary for
the cathodic protection system to have sufficient monitoring provisions to demonstrate that the
system meets the criteria of protection specified in 8.6;
— subclause 8.6 has been revised;
— Annex A has been revised and its figures have been updated;
— Clause A.7 has been moved to the new Annex D and a new Clause A.7 “Benefits of cathodic protection
current when criteria in 8.6 are not fully met” has been added;
— Annex B has been revised completely;
— a new clause, Clause C.5 “Hybrid anodes”, has been added;
— a new annex, Annex D “Notes on reference electrodes”, has been added;
— the references in the whole document have been revised.
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.
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SIST EN ISO 12696:2022
ISO 12696:2022(E)
Introduction
This document applies to cathodic protection of steel in concrete, with the concrete atmospherically
exposed, buried or immersed.
As the criteria of protection for steel in buried or immersed concrete are those applicable to cathodic
protection of steel in atmospherically exposed concrete, this revision of ISO 12696:2016 incorporates
cathodic protection of steel in buried and immersed concrete. The provision of cathodic protection
current can often be more economically provided to steel in buried and immersed concrete by using
buried or immersed anode systems detailed in International Standards for buried and immersed steel
structures, rather than the anode systems that are suitable for applications to steel in atmospherically
exposed concrete. Therefore, reference is made to other International Standards in this respect while
the cathodic protection performance criteria for steel in concrete are specified in this document for all
exposures.
There are other electrochemical treatments intended to provide corrosion control for steel in
concrete. These techniques include re-alkalization and chloride extraction and are not incorporated
[10] [11]
in this document. See EN 14038-1:2016 and EN 14038-2:2020 for information on electrochemical
treatments.
Cathodic protection of steel in concrete is a technique that has been demonstrated to be successful in
appropriate applications in providing cost effective long-term corrosion control for steel in concrete.
It is a technique that requires specific design calculations and definition of installation procedures in
order to be successfully implemented. This document does not represent a design code for cathodic
protection of steel in concrete, but represents a performance standard for which it is anticipated that
a detailed design and specification for materials, installation, commissioning and operation will be
prepared by experts and experienced persons.
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SIST EN ISO 12696:2022
INTERNATIONAL STANDARD ISO 12696:2022(E)
Cathodic protection of steel in concrete
1 Scope
This document specifies performance requirements for cathodic protection of steel in cement-based
concrete, in both new and existing structures. It covers building and civil engineering structures,
including carbon steel reinforcement and prestressed reinforcement embedded in the concrete. It is
applicable to uncoated steel reinforcement and to organic-coated steel reinforcement. It is not applicable
to reinforced concrete containing electrically conductive fibres (e.g. carbon or steel).
This document applies to steel embedded in atmospherically exposed, buried, immersed and tidal
elements of buildings or structures.
This document is only applicable to the applications of cathodic protection to steel in concrete which
are designed with the intention to, and can be demonstrated to, meet the criteria of protection specified
in 8.6. This requires the provision of sufficient performance monitoring systems as specified in 6.3 to
all parts of the structure intended to be protected, in order to assess the extent to which the criteria in
8.6 are met.
This document does not apply to galvanic anodes or systems applied into patch repairs to reduce the
effects of ‘incipient anodes’. This document does also not apply to any form of cathodic protection
systems or other electrochemical treatments that either cannot meet the requirements of 8.6 or are not
provided with the performance monitoring systems (see 6.3) that are necessary to assess whether the
criteria of protection specified in 8.6 are met.
NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete.
NOTE 2 This document, while not specifically intended to address cathodic protection of steel in any
electrolyte except concrete, can be applied to cathodic protection of steel in other cementitious materials such as
th
are found, for example, in early 20 century steel-framed masonry, brick and terracotta clad buildings. In such
applications, additional considerations specific to these structures are required in respect of design, materials
and installation of cathodic protection; however, the requirements of this document can be applied to these
systems.
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 8044, Corrosion of metals and alloys — Vocabulary
ISO 15257, Cathodic protection — Competence levels of cathodic protection persons — Basis for a
certification scheme
IEC 60502-1, Power cables with extruded insulation and their accessories for rated voltages from 1 kV
(Um
...
SLOVENSKI STANDARD
oSIST prEN ISO 12696:2021
01-april-2021
Katodna zaščita jekla v betonu (ISO/DIS 12696:2021)
Cathodic protection of steel in concrete (ISO/DIS 12696:2021)
Kathodischer Korrosionsschutz von Stahl in Beton (ISO/DIS 12696:2021)
Protection cathodique de l’acier dans le béton (ISO/DIS 12696:2021)
Ta slovenski standard je istoveten z: prEN ISO 12696
ICS:
77.060 Korozija kovin Corrosion of metals
77.140.15 Jekla za armiranje betona Steels for reinforcement of
concrete
91.080.40 Betonske konstrukcije Concrete structures
oSIST prEN ISO 12696:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 12696:2021
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oSIST prEN ISO 12696:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12696
ISO/TC 156 Secretariat: SAC
Voting begins on: Voting terminates on:
2021-02-15 2021-05-10
Cathodic protection of steel in concrete
Protection cathodique de l'acier dans le béton
ICS: 77.140.15; 77.060
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
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NATIONAL REGULATIONS.
ISO/DIS 12696:2021(E)
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oSIST prEN ISO 12696:2021
ISO/DIS 12696:2021(E)
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© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 12696:2021
ISO/DIS 12696:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 3
4.1 Quality management systems . 3
4.2 Persons . 3
4.3 Design . 3
5 Structure assessment and repair . 4
5.1 General . 4
5.2 Records . 4
5.3 Visual inspection and delamination survey . 4
5.4 Chloride analysis . 4
5.5 Carbonation depth measurement . 4
5.6 Concrete cover and reinforcement location. 5
5.7 Reinforcement electrical continuity . 5
5.8 Steel/concrete potential . 5
5.9 Concrete electrical resistivity . 5
5.10 Repair . 6
5.10.1 General. 6
5.10.2 Concrete removal. 6
5.10.3 Reinforcement preparation . 6
5.10.4 Concrete reinstatement . 6
5.11 Cementitious overlay . 7
5.12 New structures . 7
6 Cathodic protection system components . 8
6.1 General . 8
6.2 Anode systems . . 8
6.2.1 General. 8
6.2.2 Conductive coating anode systems . 9
6.2.3 Activated titanium anode systems .10
6.2.4 Titania ceramic anodes .11
6.2.5 Conductive cementitious anodes .11
6.2.6 Embedded galvanic anodes .11
6.2.7 Surface-mounted galvanic anodes .12
6.2.8 Buried and immersed anodes.12
6.3 Monitoring sensors .14
6.3.1 General.14
6.3.2 Portable reference electrodes .14
6.3.3 Other sensors .15
6.4 Monitoring instrumentation .15
6.4.1 General.15
6.4.2 Digital meters .16
6.4.3 Data loggers .16
6.5 Data management system .17
6.6 Direct current cables .17
6.7 Junction boxes .18
6.8 Power supplies .19
6.9 Transformer-rectifiers . .19
7 Installation procedures .20
7.1 Electrical continuity .20
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oSIST prEN ISO 12696:2021
ISO/DIS 12696:2021(E)
7.2 Performance monitoring system .21
7.3 Connections to steel in concrete .22
7.4 Concrete repairs associated with the cathodic protection components .22
7.5 Surface preparation for anode installation.22
7.6 Anode installation .22
7.7 Connections to the anode system .23
7.8 Anode overlay, surface sealant or decorative coating application .23
7.9 Electrical installation .24
7.10 Testing during installation .24
8 Commissioning .25
8.1 Visual inspection .25
8.2 Pre-energizing measurements .25
8.3 Initial energizing of impressed current systems .26
8.4 Initial adjustment of impressed current systems .26
8.5 Initial performance assessment .26
8.6 Criteria of protection: Interpretation of performance assessment data .28
9 System records and documentation .29
9.1 Quality and test records .29
9.2 Installation and commissioning report .29
9.3 Operation and maintenance manual .29
10 Operation and maintenance .30
10.1 Intervals and procedures .30
10.2 System review .31
10.3 System review report .31
Annex A (informative) Principles of cathodic protection and its application to steel in concrete .32
Annex B (informative) Design Process .40
Annex C (informative) Notes on anode systems .47
Annex D (informative) Notes on reference electrodes .52
Bibliography .56
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oSIST prEN ISO 12696:2021
ISO/DIS 12696:2021(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 156, Corrosion of metals and alloys and
CEN/TC 219, Cathodic protection of steel in concrete.
This third edition cancels and replaces the second edition (ISO 12696:2016), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— 3.1 “steel surface ratio” has been added;
— 8.6 has been revised;
— Annex A has been revised: the figures in Annex A has been updated; A.7 has been moved to the new
Annex D and a new Clause A.7 “Benefits of Cathodic Protection Current when Criteria in 8.6 are not
fully met” has been added;
— Annex B has been revised completely;
— New Annex D;
— C.5 “Hybrid anodes” has been added;
— The references in the whole document has been revised.
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.
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oSIST prEN ISO 12696:2021
ISO/DIS 12696:2021(E)
Introduction
This document applies to cathodic protection of steel in concrete, with the concrete atmospherically
exposed, buried or immersed.
Because the criteria of protection for steel in buried or immersed concrete are those applicable to
cathodic protection of steel in atmospherically exposed concrete, this revision of EN 12696:2016
incorporates cathodic protection of steel in buried and immersed concrete. The provision of cathodic
protection current can often be more economically provided to steel in buried and immersed concrete
by using buried or immersed anode systems detailed in International Standards for buried and
immersed steel structures, rather than the anode systems that are suitable for applications to steel
in atmospherically exposed concrete. Therefore, reference is made to other International Standards in
this respect while the cathodic protection performance criteria for steel in concrete are defined in this
document for all exposures.
There are other electrochemical treatments intended to provide corrosion control for steel in concrete.
These techniques include re-alkalization and chloride extraction and are not incorporated into this
document. EN 14038-1:2016 and prEN 14038-2:2019 have been published.
Cathodic protection of steel in concrete is a technique that has been demonstrated to be successful in
appropriate applications in providing cost effective long-term corrosion control for steel in concrete.
It is a technique that requires specific design calculations and definition of installation procedures in
order to be successfully implemented. This document does not represent a design code for cathodic
protection of steel in concrete, but represents a performance standard for which it is anticipated, in
order to comply with this document, a detailed design and specification for materials, installation,
commissioning and operation will be prepared by expert and experienced persons.
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oSIST prEN ISO 12696:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 12696:2021(E)
Cathodic protection of steel in concrete
1 Scope
This document specifies performance requirements for cathodic protection of steel in cement-based
concrete, in both new and existing structures. It covers building and civil engineering structures,
including carbon steel reinforcement and prestressed reinforcement embedded in the concrete. It is
applicable to uncoated steel reinforcement and to organic-coated steel reinforcement. It is not applicable
to carbon fibre reinforced concrete.
This document applies to steel embedded in atmospherically exposed, buried, immersed and tidal
elements of buildings or structures.
This document applies only to the applications of cathodic protection to steel in concrete which are
designed with the intention to, and can be demonstrated to, meet the Criteria of Protection as defined
in 8.6. This requires the provision of sufficient performance monitoring systems as defined in 6.3 to all
parts of the structure intended to be protected, in order to assess the extent to which the Criteria in 8.6
are met.
This may exclude from the Scope of this document galvanic anodes or systems applied into patch repairs
to reduce the effects of ‘incipient anodes’. This may also exclude from the Scope of this document any
form of cathodic protection systems or other electrochemical treatments that either cannot meet the
requirements of 8.6 or are not provided with the performance monitoring systems (see 6.3) that are
necessary to assess whether the Criteria of Protection as defined in 8.6 are met.
NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete.
NOTE 2 This document, while not specifically intended to address cathodic protection of steel in any
electrolyte except concrete, can be applied to cathodic protection of steel in other cementitious materials such as
are found, for example, in early 20th century steel-framed masonry, brick and terracotta clad buildings. In such
applications, additional considerations specific to these structures are required in respect of design, materials
and installation of cathodic protection; however, the requirements of this document can be applied to these
systems.
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 1504 (all parts), Products and systems for the protection and repair of concrete structures —
Definitions, requirements, quality control and evaluation of conformity
EN 14629, Products and systems for the protection and repair of concrete structures — Test methods —
Determination of chloride content in hardened concrete
EN 14630, Products and systems for the protection and repair of concrete structures — Test methods —
Determination of carbonation depth in hardened concrete by the phenolphthalein method
ISO 15257, Cathodic protection — Competence levels of cathodic protection persons — Basis for a
certification scheme
IEC 60502-1, Power cables with extruded insulation and their accessories for rated voltages from 1 kV
(Um = 1,2 kV) to 30 kV (Um = 36 kV) — Part 1: Cables for rated voltages of 1 kV (Um = 1,2 kV) and 3 kV
(Um = 3,6 kV)
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oSIST prEN ISO 12696:2021
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IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61140, Protection against electric shock — Common aspects for installation and equipment
IEC 61558-1, Safety of power transformers, power supplies, reactors and similar products — Part 1: General
requirements and tests
IEC 61558-2-1, Safety of power transformers, power supplies, reactors and similar products — Part 2-1:
Particular requirements and tests for separating transformers and power supplies incorporating separating
transformers for general applications
IEC 61558-2-2, Safety of power transformers, power supplies, reactors and similar products — Part 2-2:
Particular requirements and tests for control transformers and power supplies incorporating control
transformers
IEC 61558-2-4, Safety of transformers, reactors, power supply units and similar products for supply voltages
up to 1 100 V — Part 2-4: Particular requirements and tests for isolating transformers and power supply
units incorporating isolating transformers
IEC 61558-2-13, Safety of transformers, reactors, power supply units and similar products for supply
voltages up to 1 100 V — Part 2-13: Particular requirements and tests for auto transformers and power
supply units incorporating auto transformers
IEC 61558-2-16, Safety of transformers, reactors, power supply units and similar products for voltages
up to 1 100 V — Part 2-16: Particular requirements and tests for switch mode power supply units and
transformers for switch mode power supply units
IEC 62262, Degrees of protection provided by enclosures for electrical equipment against external
mechanical impacts (IK code)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8044 and EN 1504 (all parts)
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
steel surface ratio
ratio of surface area of steel to surface area of concrete
3.2
zone
part of a cathodic protection system
Note 1 to entry: Anode systems can be divided into separate zones to supply current to a fully continuous
reinforcement mesh. Alternatively, a single anode zone can supply current to separate, electrically isolated,
zones within the reinforcement system. Zones can comprise an individual anode zone for each reinforcement
zone or exposure condition. As the current provision to each of the zones in each of these alternatives can be
separately measured, all of them are generically called “cathodic protection zones” and specifically “anode zones”
or “cathode zones”.
3.3
humectant
hygroscopic material, i.e. a substance that promotes the retention of moisture
Note 1 to entry: It can be applied to the surface of a galvanic anode to keep the concrete-anode interface moist.
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4 General
4.1 Q
...
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