Corrosion of mild steel under aerobic conditions in the presence of a monoculture of aerobic bacteria (Pseudomonas fragi K [P. fragi K]) has been studied in a continuous flow system using electrochemical impedance spectroscopy (EIS). P. fragi K grown in Luria-Bertani (LB) medium causes a 10- to 20-fold decrease in the corrosion rate of mild steel after a biofilm becomes visible on the surface of the samples. Live viable bacteria are necessary for the observed corrosion reduction of mild steel, indicating an active role rather than a barrier effect of the biofilm. Flowing nitrogen through the solution was found to be less effective than P. fragi K in lowering the corrosion rate of mild steel, suggesting that an effect by bacteria, in addition to scavenging oxygen, is involved. The effect of nutrient flow rate on the ability of the bacteria to control corrosion was also examined. It was found that the corrosion inhibition of mild steel increases somewhat as the medium flow rate decreases below a certain level.
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1 May 2002
Research Article|
May 01 2002
Corrosion Control of Mild Steel by Aerobic Bacteria Under Continuous Flow Conditions Available to Purchase
Kh.M. Ismail;
Kh.M. Ismail
fn1-1_3277631
*Department of Chemical and Biochemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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T. Gehrig;
T. Gehrig
fn2-1_3277631
**Department of Chemical and Biochemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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A. Jayaraman;
A. Jayaraman
fn3-1_3277631
***Department of Chemical and Biochemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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T.K. Wood;
T.K. Wood
fn4-1_3277631
****Department of Chemical and Biochemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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K. Trandem;
K. Trandem
fn5-1_3277631
*****Department of Chemical and Biochemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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J.C. Earthman
J.C. Earthman
******Department of Chemical Engineering and Materials Science, University of California–Irvine, Irvine, CA 92697-2575.
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Present address: Department of Chemistry, University of Cairo, Egypt.
Present address: Gencorp Aerojet, Sacramento, CA.
Present address: Center for Engineering in Medicine, Massachusetts General Hospital, Cambridge, MA.
Present address: Department of Chemical Engineering, University of Connecticut, Storrs, CT.
Present address: Research and Development, Pall Corp., 2200 Northern Blvd., East Hills, NY 11548.
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2002
CORROSION (2002) 58 (5): 417–423.
Citation
Kh.M. Ismail, T. Gehrig, A. Jayaraman, T.K. Wood, K. Trandem, P.J. Arps, J.C. Earthman; Corrosion Control of Mild Steel by Aerobic Bacteria Under Continuous Flow Conditions. CORROSION 1 May 2002; 58 (5): 417–423. https://doi.org/10.5006/1.3277631
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