ISO/PRF 22230

• Abstract:

  This document specifies terms, definitions, requirements and test methods for phosphate conversion coatings which are usually applied to magnesium alloy components (hereinafter referred to as film).

• Status: Not Published
• ICS: 25.220.20 - Surface treatment
• ICS: 77.120.20 - Magnesium and magnesium alloys
• Technical Committee: ISO/TC 79/SC 5 - Magnesium and alloys of cast or wrought magnesium
• Drafting Committee: ISO/TC 79/SC 5 - Magnesium and alloys of cast or wrought magnesium
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 23-Oct-2026
• Completion Date: 24-Oct-2026

International
Standard
ISO 22230
First edition
Specification for phosphate
conversion coating on magnesium
and its alloys
Spécifications relatives aux couches de conversion au phosphate
sur le magnésium et ses alliages
PROOF/ÉPREUVE
Reference number
ISO 22230:2026(en) © ISO 2026
ISO 22230:2026(en)
© ISO 2026
All rights reserved.
This ISO publication is protected by copyright and is owned by ISO and/or its licensors.
The content of this ISO publication is provided under licence, not sold. Use is subject to the applicable licence terms issued by ISO,
an ISO member body, or an authorized third-party distributor.
Except as required for implementation or expressly permitted by a separate licence, no part of this ISO publication may be
reproduced, distributed, modified, used, or made available in any form or by any means – electronic or mechanical, including
photocopying, scanning, recording, or posting on internal or external digital platforms.
Any use beyond the scope of the granted rights is prohibited and may result in legal action.
ISO copyright office
CP 401 • CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 22230:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Information to be supplied by the purchaser .1
5 Requirements . 2
5.1 General .2
5.2 Classification .2
5.3 Marking .2
6 Performance requirements . . 3
6.1 General .3
6.2 Appearance .3
6.3 Corrosion resistance .3
6.4 Post treatments.3
PROOF/ÉPREUVE
iii
ISO 22230:2026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
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.
PROOF/ÉPREUVE
iv
ISO 22230:2026(en)
Introduction
Phosphate conversion coatings are applied to magnesium and its alloy components either as an end finish or
as a pretreatment layer for other coatings. They are intended to:
— improve corrosion resistance durin
...

Formatted: Spanish (Uruguay)
ISO/TC 79/SC 5
Secretariat: SAC
Date: 2026-08-2810-23
Specification for phosphate conversion coating on magnesium and its
alloys
Spécifications relatives aux couches de conversion au phosphate sur le magnésium et ses alliages
PROOF
© ISO 2026
All rights reserved. Unless otherwise specified,
This ISO publication is protected by copyright and is owned by ISO and/or its licensors.
The content of this ISO publication is provided under licence, not sold. Use is subject to the applicable licence terms issued
by ISO, an ISO member body, or an authorized third-party distributor.
Except as required in the context of its for implementation or expressly permitted by a separate licence, no part of this
ISO publication may be reproduced or utilized otherwise, distributed, modified, used, or made available in any form or
by any means, – electronic or mechanical, including photocopying, scanning, recording, or posting on internal or external
digital platforms.
Any use beyond 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 countryscope of the requestergranted rights is prohibited and may
result in legal action.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
E-mailEmail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iii
Introduction . iii
Scope . iii
Normative references . iii
Terms and definitions . iii
phosphating conversion coatings . iii
phosphating conversion coatings as end finish . iii
phosphating conversion coatings as pretreated layer. iii
Information to be supplied by the purchaser . iii
Requirements . iii
General . iii
Classification . iii
Marking . iii
Performance requirements . iii
General . iii
Appearance . iii
Corrosion resistance . iii
Post treatments . iii
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Information to be supplied by the purchaser . 1
5 Requirements . 2
5.1 General. 2
5.2 Classification. 2
5.3 Marking . 3
6 Performance requirements . 3
6.1 General. 3
6.2 Appearance . 3
6.3 Corrosion resistance . 3
6.4 Post treatments . 4

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
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.or
...