Corrosion reactions between T. ferrooxidans and pure iron were studied by using linear polarization technique. The effect of pH on corrosion was the main focus of this study. Experiments were performed at pH 1.0,2.0,3.0 and 4.0 under controlled and uncontrolled conditions. In addition to the corrosion kinetic parameters (Icorr, Ecorr, and Rp), the redox potential and pH changes for the uncontrolled case were also monitored over time. In-situ imaging was done by an Atomic Force Microscope in tapping mode and also by a digital video camera. Biocorrosion of iron differs from abiotic corrosion in that ferric iron is generated by bacterial metabolic activity.

Subject
Ions, Electrochemical cells, Corrosion rate, Reaction products, Atomic force microscopy, Metal surfaces, Iron, Corrosion reactions, Linear polarization, Acidity, Corrosion products, Constants, Experimental data
Keywords:
Biocorrosion of iron, T. ferrooxidans biocorrosion, linear polarization, Atomic Force Microscopy
© 2001 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).
2001
Association for Materials Protection and Performance (AMPP)
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