SIST EN ISO 12696:2012
(Main)Cathodic protection of steel in concrete (ISO 12696:2012)
Cathodic protection of steel in concrete (ISO 12696:2012)
To prepare a standard (EN) or revise EN 12696, to cover Cathodic Protection of steel in concrete - buried and submerged.
Kathodischer Korrosionsschutz von Stahl in Beton (ISO 12696:2012)
Diese Internationale Norm legt die Leistungsanforderungen an den kathodischen Korrosionsschutz von Stahl
in Beton (auf Zementbasis) sowohl in neuen als auch bestehenden Bauwerken fest. Sie umfasst die der Luft
ausgesetzten Teile von Gebäuden und Tiefbauwerken, einschließlich in Beton eingebetteter nicht vorgespannter
und vorgespannter Bewehrung. Sie ist anwendbar auf unbeschichteten und auf organisch
beschichteten Bewehrungsstahl.
Diese Internationale Norm ist anwendbar auf Stahl, der in Teile von Gebäuden oder in Bauwerke eingebettet
ist, die der Luft ausgesetzt, erdverlegt oder unter Wasser befindlich oder durch Gezeiten beeinflusst sind.
ANMERKUNG 1 Anhang A gibt eine Übersicht über die Grundsätze des kathodischen Korrosionsschutzes und dessen
Anwendung auf Stahl in Beton.
ANMERKUNG 2 Diese Internationale Norm, die 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
Materialien, wie sie beispielsweise bei in Stahlrahmen eingesetztem Mauerwerk, Bausteinen und mit Terracotta
verkleideten Bauwerken aus dem frühen 20. Jahrhundert zu finden sind, angewendet werden. Bei derartigen Anwendungen
sind zusätzliche Überlegungen für diese Bauwerke hinsichtlich Ausführung, Materialien und Einbau des kathodischen
Schutzes erforderlich; die Anforderungen der vorliegenden Internationalen Norm können jedoch für diese
Bauwerke angewendet werden.
Protection cathodique de l'acier dans le béton (ISO 12696:2012)
L'ISO 12696:2012 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. Elle traite des bâtiments et des ouvrages d'art, y compris les armatures et les précontraintes noyées dans le béton. Elle s'applique aux armatures en acier non revêtu et aux armatures en acier recouvert par un revêtement organique.
L'ISO 12696:2012 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.
Katodna zaščita jekla v betonu (ISO 12696:2012)
Ta mednarodni standard določa zahteve glede zmogljivosti za katodno zaščito jekla v betonu na osnovi cementa v novih in obstoječih zgradbah. Zajema stavbe in gradbene inženirske zgradbe, vključno z običajno armaturo in prednapeto armaturo v betonu. Uporablja se za neprevlečeno jekleno armaturo in organsko prevlečeno jekleno armaturo. Ta mednarodni standard se uporablja za jeklo v ozračju izpostavljenih, zakopanih, potopljenih in plimnih elementih stavb ali zgradb.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12696:2012
01-maj-2012
1DGRPHãþD
SIST EN 12696:2000
.DWRGQD]DãþLWDMHNODYEHWRQX ,62
Cathodic protection of steel in concrete (ISO 12696:2012)
Kathodischer Korrosionsschutz von Stahl in Beton (ISO 12696:2012)
Protection cathodique de l'acier dans le béton (ISO 12696:2012)
Ta slovenski standard je istoveten z: EN ISO 12696:2012
ICS:
77.060 Korozija kovin Corrosion of metals
91.080.40 Betonske konstrukcije Concrete structures
SIST EN ISO 12696:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12696:2012
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SIST EN ISO 12696:2012
EUROPEAN STANDARD
EN ISO 12696
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2012
ICS 77.140.15; 77.060 Supersedes EN 12696:2000
English Version
Cathodic protection of steel in concrete (ISO 12696:2012)
Protection cathodique de l'acier dans le béton (ISO Kathodischer Korrosionsschutz von Stahl in Beton (ISO
12696:2012) 12696:2012)
This European Standard was approved by CEN on 31 January 2012.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12696:2012: E
worldwide for CEN national Members.
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SIST EN ISO 12696:2012
EN ISO 12696:2012 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 12696:2012
EN ISO 12696:2012 (E)
Foreword
This document (EN ISO 12696:2012) has been prepared by Technical Committee CEN/TC 219 "Cathodic
protection", the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 156
"Corrosion of metals and alloys".
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 August 2012, and conflicting national standards shall be withdrawn at
the latest by August 2012.
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 12696:2000.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
3
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SIST EN ISO 12696:2012
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SIST EN ISO 12696:2012
INTERNATIONAL ISO
STANDARD 12696
First edition
2012-02-01
Cathodic protection of steel in concrete
Protection cathodique de l’acier dans le béton
Reference number
ISO 12696:2012(E)
©
ISO 2012
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
Contents Page
Foreword . v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General . 2
4.1 Quality management systems . 2
4.2 Personnel . 3
4.3 Design . 3
5 Structure assessment and repair . 3
5.1 General . 3
5.2 Records . 3
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 . 4
5.7 Reinforcement electrical continuity . 4
5.8 Steel/concrete potential . 5
5.9 Concrete electrical resistivity . 5
5.10 Repair . 5
5.11 Cementitious overlay . 6
5.12 New structures . 6
6 Cathodic protection system components . 7
6.1 General . 7
6.2 Anode systems . 7
6.3 Monitoring sensors .12
6.4 Monitoring instrumentation .14
6.5 Data management system .15
6.6 D.C. cables .16
6.7 Junction boxes .17
6.8 Power supplies .17
6.9 Transformer-rectifiers .17
7 Installation procedures .19
7.1 Electrical continuity .19
7.2 Performance monitoring system .19
7.3 Connections to steel in concrete .20
7.4 Concrete repairs associated with the cathodic protection components .20
7.5 Surface preparation for anode installation .20
7.6 Anode installation .21
7.7 Connections to the anode system .21
7.8 Anode overlay, surface sealant or decorative coating application .21
7.9 Electrical installation .22
7.10 Testing during installation .22
8 Commissioning .23
8.1 Visual inspection .23
8.2 Pre-energizing measurements .23
8.3 Initial energizing of impressed current systems .23
8.4 Initial adjustment of impressed current systems .24
8.5 Initial performance assessment .24
8.6 Criteria of protection: Interpretation of performance assessment data .25
8.7 Adjustment of protection current for impressed current systems .26
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
9 System records and documentation .26
9.1 Quality and test records .26
9.2 Installation and commissioning report .27
9.3 Operation and maintenance manual .27
10 Operation and maintenance .28
10.1 Intervals and procedures .28
10.2 System review .29
10.3 System review report .29
Annex A (informative) Principles of cathodic protection and its application to steel in concrete .30
Annex B (informative) Design process .36
Annex C (informative) Notes on anode systems .39
Bibliography .44
iv © ISO 2012 – All rights reserved
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SIST EN ISO 12696:2012
ISO 12696:2012(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 12696 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 219, Cathodic protection, in collaboration with Technical Committee ISO/TC 156, Corrosion of metals and
alloys in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This first edition cancels and replaces EN 12696:2000, which has been technically revised.
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
Introduction
This International Standard 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 12696:2000 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 whilst the cathodic protection performance criteria for
steel in concrete are defined in this International Standard for all exposures.
There are other electrochemical treatments intended to provide corrosion control for steel in concrete. These
techniques include re-alkalisation and chloride extraction and are not incorporated into this International
[7] [27]
Standard. CEN/TS 14038-1:2004 and CEN/TS 14038-2:2011 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 International Standard 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 standard,
a detailed design and specification for materials, installation, commissioning and operation will be prepared.
vi © ISO 2012 – All rights reserved
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SIST EN ISO 12696:2012
INTERNATIONAL STANDARD ISO 12696:2012(E)
Cathodic protection of steel in concrete
1 Scope
This International Standard 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
normal reinforcement and prestressed reinforcement embedded in the concrete. It is applicable to uncoated
steel reinforcement and to organic-coated steel reinforcement.
This International Standard applies to steel embedded in atmospherically exposed, buried, immersed and tidal
elements of buildings or structures.
NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete.
NOTE 2 This International Standard, whilst not specifically intended to address cathodic protection of steel in any
electrolyte except concrete, may 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 International Standard may be applied to these systems.
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 8044, Corrosion of metals and alloys — Basic terms and definitions
ISO 13174, Cathodic protection for harbour installations
EN 1504 (all parts), Products and systems for the protection and repair of concrete structures — Definitions,
requirements, quality control and evaluation of conformity
EN 12954, Cathodic protection of buried or immersed metallic structures — General principles and application
for pipelines
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
EN 15257, Cathodic protection — Competence levels and certification of cathodic protection personnel
IEC 60502-1, Power cables with extruded insulation and their accessories for rated voltages from 1 kV (U = 1,2 kV)
m
to 30 kV (U = 36 kV) — Part 1: Cables for rated voltages of 1 kV (U = 1,2 kV) and 3 kV (U = 3,6 kV)
m m m
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
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
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 and the following apply.
3.1
zone
part of a cathodic protection system
NOTE Anode systems may be divided into separate zones to supply current to a fully continuous reinforcement mesh.
Alternatively, a single anode zone may supply current to separate, electrically isolated, zones within the reinforcement
system. Zones may 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”.
3.2
humectant
hygroscopic material, i.e. a substance that promotes the retention of moisture
NOTE It may be applied to the surface of a galvanic anode to keep the concrete-anode interface moist.
4 General
4.1 Quality management systems
The design, the installation, the energizing, the commissioning, and the long-term operation of all of the
elements of cathodic protection systems for steel in concrete shall be fully documented.
NOTE ISO 9000 constitutes a suitable Quality Management Systems Standard which may be utilized.
Each element of the work shall be undertaken in accordance with a fully documented quality plan.
Each stage of the design shall be checked and the checking shall be documented.
Each stage of the installation, energizing, commissioning and operation shall be the subject of appropriate
visual, mechanical and/or electrical testing, and all testing shall be documented.
All test instrumentation shall have valid calibration certificates traceable to national or European Standards
concerning calibration.
The documentation shall constitute part of the permanent records for the works.
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
4.2 Personnel
Each aspect of the cathodic protection system design, installation, testing of the installation, energizing,
commissioning and long-term operational control shall be under the supervision of personnel with appropriate
qualifications, training, expertise and experience in the particular element of the work for which they are responsible.
NOTE Cathodic protection of steel in concrete is a specialist multidiscipline activity. Expertise is required in the fields
of electrochemistry, concrete technology, civil and/or structural engineering and cathodic protection engineering.
Personnel who undertake the design, supervision of installation, commissioning, supervision of operation,
measurements, monitoring and supervision of maintenance of cathodic protection systems shall have the
appropriate level of competence for the tasks undertaken. EN 15257 specifies a suitable method which may be
utilized for assessing the competence of cathodic protection personnel.
The competence of cathodic protection personnel to the appropriate level for tasks undertaken should be
demonstrated by certification in accordance with EN 15257 or by another equivalent prequalification procedure.
4.3 Design
This International Standard does not represent a design code but is a performance standard.
Cathodic protection systems for steel in concrete shall be the subject of detailed design.
The design shall, as a minimum, include the following:
a) detailed calculations;
b) detailed installation drawings;
c) detailed material and equipment specifications;
d) detailed method statements or specifications for installation, testing, energizing, commissioning and operation;
e) structures containing prestressing shall be assessed for their susceptibility to hydrogen embrittlement and
for risk of stray currents.
NOTE Annex B lists items that should be considered in the detailed design.
5 Structure assessment and repair
5.1 General
For cathodic protection (or cathodic prevention) of new structures, see 5.12.
The assessment of an existing structure, including its material condition, its structural integrity, and whether
and how to repair it, shall be performed in accordance with EN 1504.
When cathodic protection is proposed as the repair/protection method, or part of it, for a structure, additional
investigation shall be undertaken in order to
a) confirm the suitability of cathodic protection, and
b) provide system-design input information. See Annex B.
These investigations shall include, but shall not be limited to, those in 5.2 to 5.10.
5.2 Records
All available drawings, specifications, records and notes shall be reviewed to assess the location, quantity,
nature (e.g. normal, galvanized, epoxy-coated, prestressed) and continuity of the reinforcement and any
additional steel, the constituents and quality of the concrete.
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SIST EN ISO 12696:2012
ISO 12696:2012(E)
The available information shall be confirmed and supplemented by site survey and laboratory tests, as specified
in 5.3 to 5.8.
5.3 Visual inspection and delamination survey
Visual survey data shall be collected to ascertain the type, causes and extent of defects, and any features
of the structure or its surrounding environment, which could influence the application and effectiveness of
cathodic protection. Areas which have been previously repaired, and the repair methods and materials, shall
be identified.
All areas of the structure which require to be cathodically protected shall be checked for delamination of the
concrete cover.
Defects, such as cracks, honeycombing, or poor construction joints, which could permit significant water
penetration, and which could in turn impair the effectiveness or durability of the cathodic protection system,
shall be recorded.
Where necessary, the inspection and survey of buried or immersed elements will be faci
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