SIST EN ISO 2376:2019
(Main)Anodizing of aluminium and its alloys - Determination of breakdown voltage and withstand voltage (ISO 2376:2019)
Anodizing of aluminium and its alloys - Determination of breakdown voltage and withstand voltage (ISO 2376:2019)
This document specifies test methods for the determination of the breakdown voltage and withstand voltage of anodic oxidation coatings on aluminium and its alloys, on flat or near-flat surfaces and on round wire. The methods are applicable to anodic oxidation coatings used primarily as electrical insulators.
The methods are not applicable to coatings in the vicinity of cut edges, the edges of holes, or sharp changes of angle on, for example, extruded shapes.
NOTE 1 Breakdown voltage and withstand voltage are affected by relative humidity.
NOTE 2 The methods described do not give satisfactory results for unsealed coatings because they are affected by the humidity in particular.
Anodisieren von Aluminium und Aluminiumlegierungen - Bestimmung der elektrischen Durchschlagspannung (ISO 2376:2019)
Dieses Dokument legt Prüfverfahren zur Bestimmung der Durchschlagspannung und Spannungsfestigkeit für anodisch erzeugte Oxidschichten auf Aluminium und Aluminiumlegierungen auf flachen oder nahezu flachen Oberflächen und auf Runddraht fest. Die Verfahren sind auf anodisch erzeugte Oxidschichten anwendbar, die hauptsächlich als elektrische Isolatoren verwendet werden.
Die Verfahren sind nicht auf Schichten in der Nähe von Schnittkanten, Lochkanten oder scharfkantigen Winkelübergängen, z. B. an Strangpressprofilen, anwendbar.
ANMERKUNG 1 Durchschlagspannung und Spannungsfestigkeit werden durch die relative Luftfeuchte beeinflusst.
ANMERKUNG 2 Für unverdichtete Schichten liefern die beschriebenen Verfahren keine zufriedenstellenden Ergebnisse, weil sie insbesondere durch die relative Luftfeuchte beeinflusst werden.
Anodisation de l'aluminium et de ses alliages - Détermination de la tension de claquage et tension de tenue (ISO 2376:2019)
Le présent document spécifie des méthodes d'essai relatives à la détermination de la tension de claquage et de la tension de tenue des couches anodiques de l'aluminium et de ses alliages, sur des surfaces planes ou quasi planes ainsi que sur les fils de section circulaire. Ces méthodes s'appliquent aux couches anodiques utilisées principalement comme isolants électriques.
Ces méthodes ne s'appliquent pas aux couches au voisinage des surfaces de coupe, des bords de trous ou des changements d'angles vifs des profilés filés, par exemple.
NOTE 1 La tension de claquage et la tension de tenue sont influencées de manière néfaste par l'humidité relative.
NOTE 2 Les méthodes décrites ne fournissent pas de résultats satisfaisants pour les couches non colmatées car elles sont influencées de manière néfaste par l'humidité, notamment.
Anodizacija aluminija in aluminijevih zlitin - Ugotavljanje električne prebojne napetosti (ISO 2376:2019)
V tem dokumentu so navedene preskusne metode za določanje električne prebojne napetosti anodno oksidiranih plasti na aluminiju in njegovih zlitinah, na ravnih ali skoraj ravnih površinah in na okrogli žici. Te metode se uporabljajo za anodno oksidirane plasti, ki se uporabljajo predvsem kot električni izolatorji.
Te metode se ne uporabljajo za plasti v bližini odrezanih robov, robov lukenj ali ostrih sprememb kota, na primer pri ekstrudiranih oblikah.
OPOMBA 1: Električna prebojna napetost je odvisna od relativne vlažnosti.
OPOMBA 2: Opisane metode ne dajejo zadovoljivih rezultatov za nezatesnjene plasti, ker nanje vpliva še zlasti vlaga.
General Information
Relations
Overview
EN ISO 2376:2019 (CEN adoption of ISO 2376:2019) defines standardized test methods for measuring the breakdown voltage and withstand voltage of anodic oxidation (anodized) coatings on aluminium and its alloys. The methods apply to coatings on flat or near‑flat surfaces and round wire that are intended primarily as electrical insulators. This edition supersedes EN ISO 2376:2010 and adds a formal withstand voltage test and additional guidance on test specimens.
Key topics and technical requirements
- Scope and limitations
- Applicable to anodic oxidation coatings used as electrical insulation on aluminium and aluminium alloys.
- Not applicable to coatings near cut edges, hole edges, or sharp angle changes (e.g., certain extruded shapes).
- Results are affected by relative humidity; unsealed coatings give unreliable results because of moisture sensitivity.
- Test principle
- Determine the voltage at which current first passes through the anodic coating (breakdown), and assess the ability to withstand a specified voltage without failure (withstand test).
- Apparatus
- 50 Hz or 60 Hz power supply and AC transformer with near‑sinusoidal output.
- Voltage regulator with smooth ramping and controlled waveform.
- Current limiting resistor (0.5 MΩ) in series with the probe.
- RMS voltage measuring device.
- Electrode probe: spherical contact face 3–8 mm diameter; probe exerts 0.5–1.0 N (typical mass 50–100 g).
- Contact plate/probe or clip for earthing and making contact to base metal; twisting machine for round‑wire tests.
- Specimen preparation
- Representative sampling from significant surfaces; avoid edges.
- Standard specimen size suggested 100 mm × 100 mm (alternatives by agreement).
- Clean with suitable organic solvent (e.g., ethanol); avoid solvents that leave protective films.
- Condition specimen in test environment >1 hour; test normally at room temperature and <65% relative humidity.
- Procedure highlights
- Breakdown test: increase voltage uniformly (≤25 V/s) from zero until sudden voltage drop indicates breakdown; perform at least five determinations and report lowest and mean values.
- Withstand test: increase to the specified voltage and maintain while observing for failure (see standard for detailed dwell times and acceptance criteria).
Applications and users
- Quality control and acceptance testing for anodizers and surface‑treatment shops.
- Product qualification for OEMs in electronics, automotive, aerospace, railway, and other industries where anodized aluminium serves as electrical insulation.
- Test laboratories, materials engineers, and purchasers specifying electrical insulation performance of anodized components.
Related standards
- ISO 7583 - Anodizing of aluminium and its alloys: terms and definitions (normative reference).
- EN ISO 2376:2010 - previous edition superseded by this document.
Keywords: anodizing of aluminium, anodic oxidation coatings, breakdown voltage, withstand voltage, electrical insulation testing, EN ISO 2376:2019, ISO 2376:2019.
Frequently Asked Questions
SIST EN ISO 2376:2019 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Anodizing of aluminium and its alloys - Determination of breakdown voltage and withstand voltage (ISO 2376:2019)". This standard covers: This document specifies test methods for the determination of the breakdown voltage and withstand voltage of anodic oxidation coatings on aluminium and its alloys, on flat or near-flat surfaces and on round wire. The methods are applicable to anodic oxidation coatings used primarily as electrical insulators. The methods are not applicable to coatings in the vicinity of cut edges, the edges of holes, or sharp changes of angle on, for example, extruded shapes. NOTE 1 Breakdown voltage and withstand voltage are affected by relative humidity. NOTE 2 The methods described do not give satisfactory results for unsealed coatings because they are affected by the humidity in particular.
This document specifies test methods for the determination of the breakdown voltage and withstand voltage of anodic oxidation coatings on aluminium and its alloys, on flat or near-flat surfaces and on round wire. The methods are applicable to anodic oxidation coatings used primarily as electrical insulators. The methods are not applicable to coatings in the vicinity of cut edges, the edges of holes, or sharp changes of angle on, for example, extruded shapes. NOTE 1 Breakdown voltage and withstand voltage are affected by relative humidity. NOTE 2 The methods described do not give satisfactory results for unsealed coatings because they are affected by the humidity in particular.
SIST EN ISO 2376:2019 is classified under the following ICS (International Classification for Standards) categories: 25.220.20 - Surface treatment; 77.120.10 - Aluminium and aluminium alloys. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 2376:2019 has the following relationships with other standards: It is inter standard links to SIST EN ISO 2376:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN ISO 2376:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN ISO 2376:2010
Anodizacija aluminija in aluminijevih zlitin - Ugotavljanje električne prebojne
napetosti (ISO 2376:2019)
Anodizing of aluminium and its alloys - Determination of breakdown voltage and
withstand voltage (ISO 2376:2019)
Anodisieren von Aluminium und Aluminiumlegierungen - Bestimmung der elektrischen
Durchschlagspannung (ISO 2376:2019)
Anodisation de l'aluminium et de ses alliages - Détermination de la tension de claquage
et tension de tenue (ISO 2376:2019)
Ta slovenski standard je istoveten z: EN ISO 2376:2019
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 2376
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 25.220.20 Supersedes EN ISO 2376:2010
English Version
Anodizing of aluminium and its alloys - Determination of
breakdown voltage and withstand voltage (ISO
2376:2019)
Anodisation de l'aluminium et de ses alliages - Anodisieren von Aluminium und
Détermination de la tension de claquage et tension de Aluminiumlegierungen - Bestimmung der elektrischen
tenue (ISO 2376:2019) Durchschlagspannung (ISO 2376:2019)
This European Standard was approved by CEN on 19 March 2019.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2376:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 2376:2019) 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 October 2019, and conflicting national standards shall
be withdrawn at the latest by October 2019.
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 2376:2010.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 2376:2019 has been approved by CEN as EN ISO 2376:2019 without any modification.
INTERNATIONAL ISO
STANDARD 2376
Third edition
2019-03
Anodizing of aluminium and its
alloys — Determination of breakdown
voltage and withstand voltage
Anodisation de l'aluminium et de ses alliages — Détermination de la
tension de claquage et de la tension de tenue
Reference number
ISO 2376:2019(E)
©
ISO 2019
ISO 2376:2019(E)
© 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.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 2376:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test specimen . 2
6.1 Sampling . 2
6.2 Treatment before testing . 2
6.3 Size . 2
7 Procedure. 3
7.1 Flat or near-flat surfaces . 3
7.1.1 Preparation of test . 3
7.1.2 Breakdown test . 3
7.1.3 Withstand voltage test . 3
7.2 Round wire . 3
8 Expression of results . 4
9 Test report . 4
ISO 2376:2019(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
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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).
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