Related electrochemical characteristics of microbial metabolism and iron corrosion

  • Jones D
  • Amy P
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Abstract

Both bacterial growth and corrosion involve electrochemical (charge-transfer)
half-cell reactions

which have been conveniently compared on the potential-pH (Pourbaix)
diagram in this paper.

We have tabulated bacteria which mediate or facilitate various pairs
of these half-cell reactions

in otherwise kinetically unfavorable electrochemical cells. The tabulated
electrochemical cells

cover the range of microbial physiology from oxidizing (aerobic) to
reducing (anaerobic) conditions

and from acidic to neutral and alkaline pH on the Pourbaix diagram.
Correlations emerging

from Pourbaix plots of microbially affected half-cell reactions are
discussed in relation to general

microbial ecology and specifically to their influence on the corrosion
of iron and carbon steel

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Authors

  • Denny A. Jones

  • Penny S. Amy

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