Microbiologically influenced corrosion (MIC) is a widespread problem in the oil and gas industry, and sulfate reducing bacteria (SRB) cause the most aggressive kind of corrosion. A sulfate-reducing enrichment culture was obtained from a natural gas transmission line, and incubated in split chamber-zero resistance ammetry incubations. Here, carbon steel electrodes were placed in a synthetic gas field brine in opposing chambers that were connected with a salt bridge. To mimic the heterogeneous metal coverage of a metal surface that causes MIC, one chamber was experimentally manipulated with the addition of the SRB culture, while the other was uninoculated. Initial measurement of positive current between the electrodes in incubations with an organic electron donor (lactate) indicated a period of priming of the metal surface by planktonic SRB, before the current transitioned to negative, indicating that the cathodic corrosive reaction was occurring on the electrode exposed to SRB activities. This negative current is consistent with hypothesized mechanisms of SRB-induced corrosion and was observed in lactate-free incubations and in uninoculated incubations amended with sulfide. These observations, combined with SRB metabolic patterns and mass loss analyses indicate the dynamic nature of SRB-mediated corrosion and illustrate the utility of real-time monitoring of MIC activities.
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1 January 2024
Research Article|
October 27 2023
Real-Time Electrochemical Monitoring of the Progress of Sulfate Reducing Bacterially Induced Corrosion of Carbon Steel Available to Purchase
Sai Prasanna Chinthala;
Sai Prasanna Chinthala
***Chemical and Biomedical Engineer, Cleveland State University, Cleveland, Ohio.
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Anwar Sadek;
Anwar Sadek
*Chemical, Biomolecular, and Corrosion Engineer, The University of Akron, Akron, Ohio.
**Corrolytics LLC, Cleveland, Ohio.
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Joshua Davis;
Joshua Davis
*****Department of Biology, The University of Akron, Akron, Ohio.
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John M. Senko;
John M. Senko
****Department of Geosciences, The University of Akron, Akron, Ohio.
*****Department of Biology, The University of Akron, Akron, Ohio.
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Chelsea N. Monty
Chelsea N. Monty
‡
***Chemical and Biomedical Engineer, Cleveland State University, Cleveland, Ohio.
‡Corresponding author. E-mail: [email protected].
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‡Corresponding author. E-mail: [email protected].
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2024, AMPP
2024
CORROSION (2024) 80 (1): 2–10.
Citation
Sai Prasanna Chinthala, Anwar Sadek, Joshua Davis, John M. Senko, Chelsea N. Monty; Real-Time Electrochemical Monitoring of the Progress of Sulfate Reducing Bacterially Induced Corrosion of Carbon Steel. CORROSION 1 January 2024; 80 (1): 2–10. https://doi.org/10.5006/4415
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