The relationship between depth of localized corrosion measurements on test specimens and the actual service life for 18 bleach plant washers is compared. Substantial depths of localized corrosion up to 15 mils occurred on test specimens exposed in vats where washers of the same alloy were giving full satisfactory service after more than 20 years service. Maximum depth of localized corrosion measurements on specimens, for two different exposure periods, showed little correlation with time of exposure. These observations indicate that Types 316 and 317 stainless steels probably have an inherent resistance to the propagation of localized corrosion that can extend their useful service life well beyond the time of initiation or onset of localized corrosion. The resistance of these stainless steels and Fe-Ni-Cr-Mo alloys, to propagation of localized corrosion, generally is identified as an area of corrosion research that merits serious attention of corrosion engineers.

Subject
Materials, Materials performance, Corrosion initiation, Corrosion testing, Corrosion attacks, Corrosion propagation, Crevice corrosion, Corrosion data, Pitting, Corrosion resistance, Localized corrosion, Alloys, Test specimen
© 1982 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).
1982
Association for Materials Protection and Performance (AMPP)
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