Magnesium and magnesium alloys -- Magnesium alloys for cast anodes

This document specifies the grades and the corresponding requirements for magnesium alloy ingots for anodes and for magnesium alloy cast anodes.

Magnésium et alliages de magnésium -- Alliages de magnésium pour anodes coulées

General Information

Status
Published
Publication Date
30-Oct-2019
Current Stage
6060 - International Standard published
Start Date
07-Oct-2019
Completion Date
31-Oct-2019
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INTERNATIONAL ISO
STANDARD 26202
Second edition
2019-10
Magnesium and magnesium alloys —
Magnesium alloys for cast anodes
Magnésium et alliages de magnésium — Alliages de magnésium pour
anodes coulées
Reference number
ISO 26202:2019(E)
ISO 2019
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ISO 26202:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 26202:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Designations ............................................................................................................................................................................................................. 1

4.1 Material ......................................................................................................................................................................................................... 1

4.2 Casting process ....................................................................................................................................................................................... 1

5 Requirements .......................................................................................................................................................................................................... 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Chemical composition ...................................................................................................................................................................... 2

6 Testing ............................................................................................................................................................................................................................. 5

6.1 Sampling ....................................................................................................................................................................................................... 5

6.2 Determination of the chemical composition ................................................................................................................. 5

6.3 Electrochemical testing ................................................................................................................................................................... 5

7 Rounding of numbers ...................................................................................................................................................................................... 5

8 Packaging and surface protection ...................................................................................................................................................... 5

Annex A (normative) Test method for the determination of the electrode potential of

galvanic anodes ...................................................................................................................................................................................................... 6

Annex B (normative) Test method for the determination of the rate of mass loss of galvanic

anodes ............................................................................................................................................................................................................................. 8

Annex C (informative) Cross-references of grade designations of this document to other

standard grades of magnesium alloy ingots for cast anodes and magnesium alloys

for cast anodes .....................................................................................................................................................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2019 – All rights reserved iii
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ISO 26202:2019(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 79, Light metals and their alloys,

Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.

This second edition cancels and replaces the first edition (ISO 26202:2007), which has been technically

revised. The main changes compared with the previous edition are as follows:
a) a note has been added in 4.1;
b) in Clause 5, the compositions in Tables 1 and 2 have been updated;

c) in Clause 5, EN-MBMgAl6Zn1 has been deleted and the designations “EN-” have been replaced

with “ISO-”;
d) “Sampling” has been included as 6.1;
e) “Packaging and surface protection” has been added as Clause 8;

f) in Annex C, cross-references of grade designations of this document to other standard grades of

magnesium alloys for cast anodes have been added.

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 2019 – All rights reserved
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ISO 26202:2019(E)
Introduction

This document classifies magnesium alloys for cast anodes into a number of grades suitable for the

applications for which they might be used. Annexes A and B describe methods for electrochemical tests

with corresponding recommended values. Annex C gives cross-references of grade designations of this

document to other standard grades of magnesium alloys for cast anodes.
© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 26202:2019(E)
Magnesium and magnesium alloys — Magnesium alloys for
cast anodes
1 Scope

This document specifies the grades and the corresponding requirements for magnesium alloy ingots

for anodes and for magnesium alloy cast anodes.
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 80000-1:2009, Quantities and units — Part 1: General
EN 1559-1, Founding — Technical conditions of delivery — Part 1: General

EN 1559-5, Founding — Technical conditions of delivery — Part 5: Additional requirements for magnesium

alloy castings
3 Terms and definitions
No terms and definitions are listed in this document.

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/
4 Designations
4.1 Material

The material shall be designated either by symbol or by number (see Tables 1 and 2).

NOTE Cross-references of grade designations of this document to other standard grades of magnesium

alloys for cast anodes are given in Annex C.
4.2 Casting process
The following symbols shall be used for the different casting processes:
— S: sand casting;
— K: permanent mould casting (gravity);
— C: continuous casting.
© ISO 2019 – All rights reserved 1
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ISO 26202:2019(E)
5 Requirements
5.1 General

The requirements for technical delivery conditions given in EN 1559-1 and EN 1559-5 shall apply, and/

or any other technical requirements specified in the order agreed between the purchaser and the

manufacturer.
5.2 Chemical composition

The chemical composition of magnesium alloy ingots for cast anodes shall conform to the requirements

given in Table 1. The chemical composition of magnesium cast anodes shall conform to the requirements

given in Table 2.
2 © ISO 2019 – All rights reserved
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ISO 26202:2019(E)
© ISO 2019 – All rights reserved 3
Table 1 — Chemical composition of magnesium alloy ingots for anode castings
Material designation Composition in percent (mass fraction)
Alloy
Others Others
...

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