ISO INTERNATIONAL STANDARD 7441 Second edition 2015-01-15 Corrosion of metals and alloys Determination of bimetallic corrosion in atmospheric exposure corrosion tests Corrosion des meétaux et alliagesDetermination de la corrosion bimetallique par des essais d'exposition de corrosion atmosphérique Reference number IS07441:2015(E) SO International Organization for Standardization IS02015 ted without license from IHS IS0 7441:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015 All rights reserved. Unless otherwise specified, 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. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland PrganizationforStandardization vided by IHS unde Not for Resale, 2015/6/2 06:14:09 etworking permitted without license from IHS IS0 7441:2015(E) Contents Page Foreword ..iv Introduction. 1 Scope 2 Normative references 3 Terms and definitions 4 Overview and comparison of methods ..2 5 Preparation of specimens. .3 5.1 Types of specimens. .3 5.1.1 General .3 5.1.2 Rectangular plates .3 5.1.3 Wire on bolt 5.2 Number and marking of specimens. .9 6 Exposure of specimens. .9 7 Evaluation of specimens .10 7.1 General. .10 7.2 Evaluation based on mass loss. .10 7.3 Other evaluation methods applicable for rectangular plates .10 7.3.1 Evaluation based on visual examination .10 7.3.2 Evaluation based on mechanical properties ..11 7.4 Calculation of bimetallic effect. .11 8 Test report .12 Bibliography .14 iii vided by IHS under lic ithout license from IHS