Mild steel was exposed in synthetic sea water to Pseudomonas sp S9 or Serratia marcescens. An increase in the corrosion resistance was observed and monitored by electrochemical techniques. Biological analyses were performed in order to characterize the system. The inhibition effect was also observed when mild steel was coated with bacteria and then inmersed in synthetic sea water. Specimens coated with bacteria were transferred to a natural sea water flow system to investigate if the protective effect was maintained under the new conditions. The preliminary results in natural sea water showed that for carbon steel, the electrochemical behavior changed completely during the first two weeks.

Subject
Water, Electrochemical cells, Corrosion rate, Metal surfaces, Lead, Biofilms, Filters, Bacteria, Corrosion inhibitors, Steel, Immersion, Polarization resistance, Corrosion potential
Keywords:
Mild steel, Serratia marcescens, Pseudomonas sp, corrosion inhibition, synthetic sea water, electrochemical techniques
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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