The kraft chemical pulping process used in the pulp and paper industry entails digesting wood chips in alkaline sulfide solutions to remove the lignin bonding the cellulose fibers together. As it is well known that general corrosion of mild steel in alkaline environments is enhanced by the presence of sulfides and other sulfur-containing species, it is not surprising that corrosion of equipment containing kraft pulping solutions is a major maintenance problem. In kraft "white liquor", where the highest concentrations of caustic and sulfide exist, severe corrosion can occur in clarifiers, storage tanks and in the digester itself.
© 1979 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).
1979
Association for Materials Protection and Performance (AMPP)
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