SIST EN ISO 11846:2008

SLOVENSKI STANDARD
SIST EN ISO 11846:2008
01-julij-2008
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Corrosion of metals and alloys - Determination of resistance to intergranular corrosion of
solution heat-treatable aluminium alloys (ISO 11846:1995)
Corrosion des métaux et alliages - Détermination de la résistance a la corrosion
intergranulaire des alliages d'aluminium aptes au traitement thermique de mise en
solution (ISO 11846:1995)
Ta slovenski standard je istoveten z: EN ISO 11846:2008
ICS:
77.060 Korozija kovin Corrosion of metals
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
SIST EN ISO 11846:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 11846
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 77.060

English Version
Corrosion of metals and alloys - Determination of resistance to
intergranular corrosion of solution heat-treatable aluminium
alloys (ISO 11846:1995)
Corrosion des métaux et alliages - Détermination de la Korrosion von Metallen und Legierungen - Bestimmung der
résistance à la corrosion intergranulaire des alliages Beständigkeit von lösungsgeglühten Aluminiumlegierungen
d'aluminium aptes au traitement thermique de mise en gegen interkristalline Korrosion (ISO 11846:1995)
solution (ISO 11846:1995)
This European Standard was approved by CEN on 21 March 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11846:2008: E
worldwide for CEN national Members.

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EN ISO 11846:2008 (E)
Contents Page
Foreword.3

2

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EN ISO 11846:2008 (E)
Foreword
The text of ISO 11846:1995 has been prepared by Technical Committee ISO/TC 156 “Corrosion of metals and
alloys” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
11846:2008 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of
which is held by BSI.
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 2008, and conflicting national standards shall be withdrawn at
the latest by October 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11846:1995 has been approved by CEN as a EN ISO 11846:2008 without any modification.

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INTERNATIONAL ISO
STANDARD
11846
First edition
1995-10-15
Corrosion of metals and alloys -
Determination of resistance to
intergranular corrosion of Solution
heat-treatable aluminium alloys
Gorrosion des metaux et alliages - Dktermination de Ia r&istance 5 Ia
corrosion in tergranulaire des alliages d ‘aluminium ap tes au traitemen t
thermique de mise en Solution
Reference number
ISO 11846:1995(E)

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ISO 11846:1995(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. Esch 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 11846 was prepared by Technical Committee
lSO/TC 156, Corrosion of metals and alloys.
Annex A of this International Standard is for information only.
0 ISO 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland

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ISO 11846:1995(E)
INTERNATIONAL STANDARD 0 ISO
Corrosion of metals and alloys - Determination of
resistance to intergranular corrosion of Solution
heat-treatable aluminium alloys
2 Normative references
1 Scope
The following Standards contain provisions which,
through reference in this text, constitute provisions
1.1 This International Standard specifies the meth-
of this International Standard. At the time of publi-
ods of integranular corrosion testing for Solution
cation, the editions indicated were valid. All Standards
heat-treatable aluminium alloys without protective
are subject to revision, and Parties to agreements
coatings.
based on this International Standard are encouraged
The sensitivity of Solution heat-treatable aluminium to investigate the possibility of applying the most re-
alloys to intergranular corrosion is a function of the cent editions of the Standards indicated below.
alloy Chemical composition, method of manufacturing, Members of IEC and ISO maintain registers of cur-
Solution heat treatment, quench treatment and arti- rently valid International Standards.
ficial precipitation hardening (ageing) treatment.
ISO 3696: 1987, Wa ter for analytical laboratory use -
In the naturally aged condition, the sensitivity of sol-
Specification and test methods.
ution heat-treatable aluminium alloys to intergranular
corrosion is a function primarily of the rate of cooling ISO 8044: 1989, Corrosion of metals and alloys - Vo-
during quenching over a critical temperature range. cabulary.
ISO 8407:1991, Corrosion of metals and alloys -
Removal of corrosion products from corrosion test
1.2 This International Standard is applicable to cast
specimens.
and wrought heat-treatable aluminium alloys in the
form of castings, forgings, plates, sheets, extrusions
and semi-finished or finished Parts, in Order to carry
3 Definitions
out comparative assessment of alloys of different
grades and thickness depending on their Chemical
For the purposes of this International Standard, the
composition and other factors, and also to check the
definitions given in ISO 8044 apply.
thermal processing quality of the tested materials.
The test results provide information to determine the 4 Test specimens
intergranular corrosion resistance and thermal pro-
cessing quality of the tested materials.
4.1 Sampling
Sampling should be carried out in such a manner as
1.3 The test results cannot be regarded as absolute,
to provide specimens from the most typical areas of
because they are not applicable to all environments
the material or the part being tested.
that tan be met in Service. They are best used in a
When controlling Solution heat treatment, samples
relative manner, to compare the intergranular cor-
are taken from that part of the semi-finished product
rosion resistance of various heats of Solution heat-
where cooling rates during quenching are the Iowest.
treatable aluminium alloys.
1

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0 ISO
ISO 11846:1995(E)
In the case of small par-ts which are quenched in 5.2 The specimens are then treated in accordance
baskets, the samples are taken from the central patt with one of the methods described in 5.2.1 or 5.2.2.
of th
...