The Electrochemical Reactivation Test (ERT), well established for nondestructive IGC testing of austenitic stainless steels, proved its applicability for duplex stainless steels, as well. The ratio between a time related reactivation current density iR and a time related activation current density iA, normalized to the actual grain boundary area, allows to quantify the degree of sensitisation. A threshold value can be defined as acceptance criteria in quality assurance systems. The test protocol has been developed for application in a laboratory test cell and a mobile test unit, as well.

Subject
Test methods, Materials, Electrochemical cells, Chromium, Solution annealing, Inspection, Chemical composition, Current densities, Steel, Duplex stainless steel, Stainless steel, Intergranular corrosion, Heat treatment
Keywords:
ERT, electrochemical reactivation, duplex stainless steel, UNS S31803, austenitic stainless steel, UNS S 31635, intergranular corrosion, sensitisation, chromium depletion, testing method
© 2007 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2007
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.