ISO INTERNATIONAL STANDARD 15158 First edition 2014-02-15 Corrosion of metals and alloys Method of measuring the pitting potential for stainless steels by potentiodynamic control in sodium chloride solution Corrosion des métaux et alliages - Méthode de mesure du potentiel de piqure des aciers inoxydables par controle potentiodynamique en solution de chlorure de sodium Reference number ISO 15158:2014(E) LSO @ IS0 2014 HS under I without license from IHS Not for Resale IS0 15158:2014(E) COPYRIGHTPROTECTEDDOCUMENT ISO2014 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 @ IS0 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 15158:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope.. ..1 2 Principle. 3 Apparatus. ..1 3.1 Potentiostat .1 3.2 Electrode potential-measuring instrument 3.3 Current-measuring instruments .1 3.4 Specimen holder .2 3.5 Test cell. 2 3.6 Auxiliary electrode .2 3.7 Reference electrode .2 4 Specimens. .3 5 Procedure .3 5.1 Preparation of reference electrodes .3 5.2 Preparation of specimen 3 5.3 Preparation of solution 3 5.4 Setting up test. .4 5.5 Recording. 5.6 Ending test. 6 Statistical analysis of pitting potential data .5 7 Test report ..5 Annex A (informative) Specimen holder 1 Annex B (informative) An example of statistical analysis of pitting potential data ..11 Bibliography .13 iii ense with ISt ed without license from IHS Not for Resale