The cyclic anodic polarization test is investigated as a method for predicting localized corrosion resistance of stainless steels in paper mill white water service. Polarization curves are generated for the austenitic stainless steels 304, 316, 317 and NITRONIC 50 in white water with modifications of chloride and sulfate ion concentrations, pH and temperature. Based on this data, parametric regimes of acceptable and unacceptable performance are described for the alloys. As would be expected from chemical composition and field service in other applications, the stainless steels are found to be increasingly resistant to localized corrosion in white water in the following order: 304, 316 and 317. However, the best performance is clearly observed with NITRONIC 50.

Subject
Water, Stainless alloys, Sulfates, Machinery, Acidity, Crevices, Crevice corrosion, Sulfate ions, Corrosion resistance, Localized corrosion, Stainless steel, Anodic polarization, Chlorides
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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