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Australian Standard^TM

Galvanic (sacrificial) anodes for cathodic protection

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This Australian Standard was prepared by Committee MT-014, Corrosion of Metals. It was approved on behalf of the Council of Standards Australia on 24 September 2003 and published on 24 November 2003.

The following are represented on Committee MT-014:

• Australasian Corrosion Association
• Australasian Institute of Metal Finishing
• Australian Chamber of Commerce and Industry
• Australian Electrolysis Committee
• The Australian Gas Association
• Australian Paint Manufacturers' Federation
• Australian Paint Approval Scheme
• Austroads
• Bureau of Steel Manufacturers of Australia
• Corrosion Prevention Centre
• Department of Defence
• Division of Building, Construction and Engineering, CSIRO
• Galvanizers Association of Australia
• Telstra
• United Water International
• Water Services Association of Australia

Additional interests participating in the preparation of this Standard:

• Corrosion consultants
• Department of Minerals and Energy
• Gas and Fuel Corporation of Victoria
• Hunter Water Board
• Petroleum refineries
• State Electricity Commission of Victoria
• Water Authority of Western Australia
• Water Resources Commission, Queensland

Keeping Standards up-to-date

Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased.

Detailed information about Standards can be found by visiting the Standards Australia web site at www.standards.com.au and looking up the relevant Standard in the on-line catalogue.

Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of revisions and amendments published each month.

We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mail@standards.com.au, or write to the Chief Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001.

This Standard was issued in draft form for comment as DR 03185.

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Australian Standard^TM

Galvanic (sacrificial) anodes for cathodic protection

Originated as AS 2239—1979.
Previous edition AS 2239—1993.
Third edition 2003.

COPYRIGHT

© Standards Australia International

All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.

Published by Standards Australia International Ltd
GPO Box 5420, Sydney, NSW 2001, Australia

ISBN 0 7337 5574 7

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PREFACE

The Standard was prepared by the Australian members of the Joint Standards Australia/Standards New Zealand Committee MT-014, Corrosion of Metals to supersede AS 2239—1993, Galvanic (sacrificial) anodes for cathodic protection. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard.

The objective of this Standard is to specify the requirements for those common anode alloys available in Australia for use in cathodic protection systems, such as those specified in the AS 2832 series of Standards.

The objective of this revision is to include new specifications and chemical composition limits for anodes.

The terms ‘normative’ and ‘informative’ have been used in this Standard to define the application of the appendix to which they apply. A ‘normative’ appendix is an integral part of a Standard, whereas an ‘informative’ appendix is only for informative and guidance.

.

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CONTENTS

Page

SECTION 1 SCOPE AND GENERAL

1. SCOPE............................................................................................................................4
2. REFERENCED DOCUMENTS.....................................................................................4
3. DEFINITIONS................................................................................................................4
4. DESIGNATION ............................................................................................................6
5. FREEDOM FROM DEFECTS ......................................................................................7
6. MARKING ....................................................................................................................7
7. ROUNDING OF TEST RESULT VALUES....................................................................7

SECTION 2 ANODE AND CORE REQUIREMENTS

1. SCOPE OF SECTION ....................................................................................................8
2. ANODES......................................................................................................................8
3. CORES........................................................................................................................8

SECTION 3 PERFORMANCE REQUIREMENTS

1. SCOPE OF SECTION ..................................................................................................15
2. MECHANICAL TEST....................................................................................................15
3. ELECTRICAL RESISTANCE.....................................................................................15
4. CONSUMPTION RATE OF ALUMINIUM ANODES IN SEA WATER......................15
5. CLOSED CIRCUIT POTENTIAL OF ALUMINIUM ANODES IN SEA WATER...15

SECTION 4 BACKFILL FOR BURIED MAGNESIUM AND ZINC GALVANIC ANODES

1. GENERAL................................................................................................................16
2. BACKFILL COMPOSITION ......................................................................................16
3. PROPERTIES AND APPLICATION .........................................................................17
4. PACKAGED ANODES................................................................................................17

APPENDICES

1. PURCHASING GUIDELINES....................................................................................18
2. GUIDANCE ON THE APPLICATION OF ANODES ................................................19
3. METHOD FOR THE DETERMINATION OF THE ANODE-TO-CORE RESISTANCE OF GALVANIC ANODES ....................................................................................................................28
4. METHOD FOR THE DETERMINATION OF THE CONSUMPTION RATE OF ALUMINIUM ANODE ALLOYS IMMERSED IN SEA WATER..............................................................31
5. METHOD FOR THE DETERMINATION OF THE CLOSED-CIRCUIT POTENTIAL OF ALUMINIUM ANODES IMMERSED IN SEA WATER ..............................................................34

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