ISO INTERNATIONAL STANDARD 11846 First edition 1995-10-15 Corrosion of metals and alloys Determination of resistance to intergranular corrosion of solution heat-treatable aluminium alloys Corrosion des métaux et alliages Détermination de la résistancea la corrosion intergranulaire des alliages d'aluminium aptes au traitement thermique de mise en solution ISO Reference number ISO 11846:1995(E) Copyright Intemational Organization for Standardization No reproduction or networking nitted without 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. Each member body interested in a subject for 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 Internationai Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 ISO/TC 156, Corrosion of metals and alloys. Annex A of this International Standard is for information only. @ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organizationfor Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii Copyright International Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale ISO11846:1995(E) INTERNATIONAL STANDARD ISO Corrosion of metals and alloys -- Determination of resistance to intergranular corrosion of solution heat-treatable aluminium alloys Scope 2 Normative references 7 The following standards contain provisions which, 1.1 This International Standard specifies the meth- through reference in this text, constitute provisions ods of integranular corrosion testing for solution of this International Standard. At the time of publi- heat-treatablealuminiumalloyswithoutprotective cation, the editions indicated were valid. All standards coatings. are subject to revision, and parties to agreements based on this International Standard areencouraged 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. alloychemicalcomposition,methodofmanufacturing 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,Water 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. Is0 8407:1991, Corrosion of metals and alloys 1.2 This International Standard is applicable to cast Removal of corrosion products from corrosion test and wrought heat-treatable aluminium alloys in the specimens. form of castings, forgings, plates, sheets, extrusions and semi-finished or finished parts, in order to carry Definitions out comparative assessment of alloys of different grades and thickness depending on their chemical For the purposes of this International Standard, the compositionandotherfactors,andalsotocheckthe definitions given in ISO 8044 apply. the