Abstract
Manganese fixing bacteria are found in many inland waters. These bacteria include Gallionella, Spaerotilus, Crenothrix, Leptothrix, Clonothrix and Lieskeella. The bacteria do not attack the stainless steels. They create the conditions leading to pitting and/or crevice corrosion. Pitting corrosion of the stainless steels comes about by a reaction of the chlorine or hypochlorite biocide with the manganese dioxide deposit through a complex mechanism through which hydrochloric acid is generated. A proposed mechanism is given. Preventative measures are suggested including cleaning and alloy systems that are highly resistant to the proposed corrosion mechanism.
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
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