SIST EN ISO 3210:2025
(Main)Anodizing of aluminium and its alloys - Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in acid solution(s) (ISO 3210:2025)
Anodizing of aluminium and its alloys - Assessment of quality of sealed anodic oxidation coatings by measurement of the loss of mass after immersion in acid solution(s) (ISO 3210:2025)
This document specifies two methods to assess the quality of sealed anodic oxidation coatings on aluminium and its alloys:
— Method 1 which assesses the quality of sealed anodic oxidation coatings by measuring the loss of mass after immersion in a phosphoric acid based solution without prior acid treatment;
— Method 2 which assesses the quality of sealed anodic oxidation coatings by measuring the loss of mass after immersion in a phosphoric acid based solution with prior acid treatment.
Method 1 is applicable to anodic oxidation coatings intended for decorative or protective purposes or where resistance to staining is important.
Method 2 is applicable to anodic oxidation coatings intended for outdoor architectural purposes. For less severe applications, Method 1 can be more suitable.
The methods are not applicable to the following:
— hard-type anodic oxidation coatings which normally are not sealed;
— anodic oxidation coatings that have been sealed only in dichromate solutions;
— anodic oxidation coatings produced in chromic acid solutions;
— anodic oxidation coatings that have undergone treatment to render them hydrophobic.
NOTE 1 While the methods assess the quality of hydrothermal sealing applied to anodized aluminium, they can be appropriate for other sealing methods.
NOTE 2 The methods are destructive and can serve as reference methods in case of doubt or dispute regarding the results of the test for loss of absorptive power (see ISO 2143) or the measurement of admittance (see ISO 2931).
Anodisieren von Aluminium und Aluminiumlegierungen - Prüfung der Qualität von verdichteten, anodisch erzeugten Oxidschichten durch Bestimmung des Masseverlustes nach Eintauchen in Säure-Lösung(en) (ISO 3210:2025)
Anodisation de l'aluminium et de ses alliages - Évaluation de la qualité des couches anodiques colmatées par mesurage de la perte de masse après immersion en solution(s) acide(s) (ISO 3210:2025)
Le présent document spécifie deux méthodes d’évaluation de la qualité des couches anodiques colmatées sur l’aluminium et ses alliages:
— la méthode 1 qui évalue la qualité des couches anodiques colmatées en mesurant la perte de masse après immersion dans une solution à base d’acide phosphorique, sans traitement acide préalable;
— la méthode 2 qui évalue la qualité des couches anodiques colmatées en mesurant la perte de masse après immersion dans une solution à base d’acide phosphorique, avec traitement acide préalable.
La méthode 1 s’applique aux couches anodiques destinées à être utilisées à des fins décoratives ou de protection ou lorsque la résistance aux taches est un facteur important.
La méthode 2 s’applique aux couches anodiques destinées à être utilisées à des fins architecturales en extérieur. Pour des applications moins critiques, la méthode 1 peut se révéler plus adaptée.
Les méthodes ne sont pas applicables:
— aux couches anodiques dures qui, normalement, ne sont pas colmatées;
— aux couches anodiques qui ont été colmatées uniquement en solutions bichromatées;
— aux couches anodiques produites dans des solutions d’acide chromique;
— aux couches anodiques qui ont subi un traitement d’imperméabilisation.
NOTE 1 Bien que les méthodes évaluent la qualité du colmatage hydrothermique appliqué à l’aluminium anodisé, elles peuvent convenir pour d’autres méthodes de colmatage.
NOTE 2 Les méthodes sont destructives et peuvent servir de méthodes de référence en cas de doute ou de litige concernant les résultats des essais de perte de pouvoir absorbant (voir l’ISO 2143) ou des essais par mesurage de l’admittance (voir l’ISO 2931).
Anodizacija aluminija in njegovih zlitin - Ocena kakovosti zatesnjenih anodno oksidiranih plasti z merjenjem izgube mase po raztapljanju v kislih raztopinah (ISO 3210:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Anodizacija aluminija in njegovih zlitin - Ocena kakovosti zatesnjenih anodno
oksidiranih plasti z merjenjem izgube mase po raztapljanju v kislih raztopinah (ISO
3210:2025)
Anodizing of aluminium and its alloys - Assessment of quality of sealed anodic oxidation
coatings by measurement of the loss of mass after immersion in acid solution(s) (ISO
3210:2025)
Anodisieren von Aluminium und Aluminiumlegierungen - Prüfung der Qualität von
verdichteten, anodisch erzeugten Oxidschichten durch Bestimmung des Masseverlustes
nach Eintauchen in Säure-Lösung(en) (ISO 3210:2025)
Anodisation de l'aluminium et de ses alliages - Évaluation de la qualité des couches
anodiques colmatées par mesurage de la perte de masse après immersion en solution
(s) acide(s) (ISO 3210:2025)
Ta slovenski standard je istoveten z: EN ISO 3210:2025
ICS:
25.220.20 Površinska obdelava Surface treatment
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 3210
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 25.220.20 Supersedes EN ISO 3210:2017
English Version
Anodizing of aluminium and its alloys - Assessment of
quality of sealed anodic oxidation coatings by
measurement of the loss of mass after immersion in acid
solution(s) (ISO 3210:2025)
Anodisation de l'aluminium et de ses alliages - Anodisieren von Aluminium und
Évaluation de la qualité des couches anodiques Aluminiumlegierungen - Prüfung der Qualität von
colmatées par mesurage de la perte de masse après verdichteten, anodisch erzeugten Oxidschichten durch
immersion en solution(s) acide(s) (ISO 3210:2025) Bestimmung des Masseverlustes nach Eintauchen in
Säure-Lösung(en) (ISO 3210:2025)
This European Standard was approved by CEN on 20 April 2025.
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3210:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 3210:2025) has been prepared by Technical Committee ISO/TC 79 "Light
metals and their alloys " in collaboration with Technical Committee CEN/TC 132 “Aluminium and
aluminium alloys” the secretariat of which is held by AFNOR.
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 April 2026, and conflicting national standards shall be
withdrawn at the latest by April 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 3210:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3210:2025 has been approved by CEN as EN ISO 3210:2025 without any modification.
International
Standard
ISO 3210
Fifth edition
Anodizing of aluminium and its
2025-10
alloys — Assessment of quality of
sealed anodic oxidation coatings
by measurement of the loss of mass
after immersion in acid solution(s)
Anodisation de l'aluminium et de ses alliages — Évaluation de
la qualité des couches anodiques colmatées par mesurage de la
perte de masse après immersion en solution(s) acide(s)
Reference number
ISO 3210:2025(en) © ISO 2025
ISO 3210:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
ISO 3210:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
5.1 General .2
5.2 Predip solution, used only for Method 2 .2
5.3 Test solution .2
5.3.1 Test solution A .2
5.3.2 Test solution B .2
6 Apparatus . 2
7 Preparation of test specimen . 2
8 Procedure . 3
8.1 Test solutions .3
8.2 Method 1 .3
8.3 Method 2 .4
9 Expression of results . 5
10 Test report . 5
Annex A (normative) Method for the degreasing and drying of test specimens . 6
Bibliography . 7
iii
ISO 3210:2025(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,
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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 2, Organic and anodic oxidation coatings on aluminium, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 132, Aluminium and aluminium alloys, in accordance
with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 3210:2017), which has been technically
revised.
The main changes are as follows:
— the maximum limit for the dissolved anodic oxidation coating and aluminium content in the test solutions
A and B has been reduced;
— the content of dissolved aluminium oxidation coating and aluminium in the used test solution has been
added to the test report in Clause 10.
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.
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