Microbiologically influenced corrosion (MIC) activity in wastewater treatment plants is discussed. Three case histories are presented showing through-wall pitting from MIC in return activated sludge (RAS) process piping systems. Field and laboratory investigation activities are reported. Alternatives are reviewed for initial corrosion prevention and mitigation following identification.

Subject
Pits, Materials, Piping, Piping systems, Walls, Biofilms, Penetration, Repair, Fluids, Linings, Microorganisms, Microbiologically influenced corrosion, Water treatment facilities
Keywords:
microbiologically influenced corrosion (MIC), wastewater treatment, return activated sludge (RAS), sulfate reducing bacteria (SRB), biofilm, tubercles, through-wall pitting, carbon steel
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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