Alaska Lumber and Pulp Co., Inc. (ALP) is a magnesium bisulfite mill producing dissolving pulp principally for the manufacture of viscose rayon. In 1974, the cost of corrosion in dollars per air dried ton of paper produced in sulfite mills in Canada was $3.71. This was 4.2% of total costs.(1) Fully annealed AISI type 316L (2.75% min. Mo) SS has been the standard for acid systems in the industry since it was recommended by Kolberg in 1957 to combat corrosion due to high chloride concentrations from the rafting of logs in salt water.(2) Since pollution control is causing the closing up of the spent acid recovery system in our mill, the chloride concentrations are rising and blowdown for chloride control with attendant materials loss is increasing.

Subject
Acids, Materials, Cooking, Acid concentration, Corrosion rate, Sulfates, Flanges, Polarization curves, Stress, Corrosion probes, Passivation, Chlorides, Protection potential
© 1977 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).
1977
Association for Materials Protection and Performance (AMPP)
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