prEN ISO 9351
(Main)Galvanic anodes for cathodic protection in seawater and saline sediments(ISO/DIS 9351:2023)
Galvanic anodes for cathodic protection in seawater and saline sediments(ISO/DIS 9351:2023)
The proposed Standard, based upon a revised and updated EN 12496: 2013 will specify the minimum requirements and give recommendations for the chemical composition, the electrochemical properties, the physical tolerances, and the test and inspection procedures for cast galvanic anodes of aluminium, magnesium and zinc alloys for cathodic protection in sea water and saline mud.
The Standard will be applicable to the majority of galvanic anodes used for seawater and saline mud applications, i.e. cast anodes of trapezoidal, "D", or circular cross section and bracelet type anodes.
The general requirements and recommendations of this proposed Standard may also be applied to other anode shapes, e.g. half-spherical, button, etc., which are sometimes used for seawater applications.
Applications for this Standard are in offshore renewables, flood defences, offshore oil and gas, offshore or submarine pipelines, ports and harbours, ships and all applications in which galvanic anodes are used for cathodic protection in sea water and saline muds.
Work is proposed to be undertaken in parallel between ISO TC 156 WG 10 and CEN TC 219 WG3, under ISO lead in accordance with the Vienna Convention. This scope is agreed in principle by both parties.
Galvanische Anoden für den kathodischen Schutz in Seewasser und salzhaltigen Sedimenten (ISO/DIS 9351:2023)
Anodes galvaniques pour la protection cathodique dans l'eau de mer et les boues salines (ISO/DIS 9351:2023)
Galvanske anode za katodno zaščito v slani vodi in slanih usedlinah (ISO/DIS 9351:2023)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Galvanske anode za katodno zaščito v slani vodi in slanih usedlinah (ISO/DIS
9351:2023)
Galvanic anodes for cathodic protection in seawater and saline sediments (ISO/DIS
9351:2023)
Galvanische Anoden für den kathodischen Schutz in Seewasser und salzhaltigen
Sedimenten (ISO/DIS 9351:2023)
Anodes galvaniques pour la protection cathodique dans l'eau de mer et les boues
salines (ISO/DIS 9351:2023)
Ta slovenski standard je istoveten z: prEN ISO 9351
ICS:
77.060 Korozija kovin Corrosion of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 9351
ISO/TC 156 Secretariat: SAC
Voting begins on: Voting terminates on:
2023-10-13 2024-01-05
Galvanic anodes for cathodic protection in seawater and
saline sediments
ICS: 77.060
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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NATIONAL REGULATIONS.
ISO/DIS 9351:2023(E)
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 9351:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 9351
ISO/TC 156 Secretariat: SAC
Voting begins on: Voting terminates on:
Galvanic anodes for cathodic protection in seawater and
saline sediments
ICS: 77.060
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
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TECHNOLOGICAL, COMMERCIAL AND
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 9351:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 9351:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviations .5
4.1 Symbols . 5
4.2 Abbreviations . 5
5 Competence of personnel .6
6 Galvanic anode materials and their properties . 6
6.1 General . 6
6.2 Anode alloy composition . 6
6.3 Electrochemical properties . . 7
6.3.1 General . 7
6.4 Electrochemical testing . 7
6.4.1 General . 7
6.4.2 Performance testing . 7
6.4.3 Short term testing for quality control . 8
6.5 Anode consumption rate . 8
7 Anode design and acceptance criteria . 9
7.1 General . 9
7.2 Chemical composition . 9
7.3 Electrochemical properties . . 10
7.4 Anode shape . 10
7.5 Physical properties . 10
7.6 Anode core materials . 11
7.7 Cable connections to anodes . 11
8 Environmental impact .12
Annex A (informative) Seawater .13
Annex B (normative) Physical tolerances for galvanic anodes .14
Annex C (informative) Composition and performance properties for galvanic anodes .20
Annex D (informative) Description of various electrochemical tests .27
Annex E (informative) Environmental impact considerations .30
Annex F (informative) Inspection and test plan (ITP) .34
Bibliography .41
iii
ISO/DIS 9351:2023(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, a.y 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, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
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/DIS 9351:2023(E)
Introduction
The anticipated performance of the cast galvanic anodes for use in sea water and saline mud or sediment
is determined by their composition and the quality of their manufacture.
This document specifies galvanic anodes for use in seawater and sediment, their chemical compositions
and physical characteristics together with inspection and test parameters, inspection procedures and
their verification necessary to deliver the documented performance values.
v
DRAFT INTERNATIONAL STANDARD ISO/DIS 9351:2023(E)
Galvanic anodes for cathodic protection in seawater and
saline sediments
1 Scope
This document specifies the minimum requirements and gives recommendations for the chemical
composition, the electrochemical properties, the physical tolerances, and the test and inspection
procedures for cast galvanic anodes of aluminium, magnesium and zinc-based alloys for cathodic
protection in sea water, saline sediment and brackish water.
This document is applicable to the majority of galvanic anodes used for seawater sediment and brackish
water applications, i.e. cast anodes of trapezoidal, or circular cross section and bracelet type anodes.
The general requirements and recommendations of this document may also be applied to other anode
shapes, e.g. half-spherical, button, etc., which are sometimes used for seawater applications.
NOTE Whilst other metals can be used as galvanic anode material to protect more noble metals than iron
and steel e.g. soft iron, these are not covered in this standard.
2 Normative references
The foll
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