A Member Company mill has purchased second hand batch digesters made from 317L stainless steel. PAPRICAN was asked to assess the corrosion resistance of the alloy, and to determine if the alloy would undergo excessive corrosion in the kraft process at the mill. A number of tests were done to determine the corrosion rates of 317L under different conditions. Electrochemical tests (polarization curves, potentiostatic tests and time to repassivation tests), were done to assess the corrosion resistance of the alloy to the range of liquors in the digester. Samples were also examined in the scanning electron microscope to determine the relationship, if any, between the corrosion rate and the corrosion morphology of the samples.
© 2001 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).
2001
Association for Materials Protection and Performance (AMPP)
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