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Journal of Applied Sciences
  Year: 2006 | Volume: 6 | Issue: 6 | Page No.: 1338-1342
DOI: 10.3923/jas.2006.1338.1342
 
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Corrosion of Low Carbon Steel Influenced by the Presence of Iron-oxidizing Bacteria (Leptothrix discophora)

Rim-rukeh Akpofure, Ikhifa O. Grace , E.J. Konyeme and Okokoyo A. Peter

Abstract:
Corrosion of low carbon steel influenced by the presence of Leptothrix discophora (Iron bacteria) has been studied, using the weight loss technique. At an exposure time (weeks) of 4, 6, 8, 10 and 12 the corresponding calculated corrosion rates in mpy in the presence of Leptothrix discophora were 1.36, 1.46, 1.69, 1.94 and 2.09 while the corrosion rates in the absence of the microorganism were 0.65, 0.69, 0.84, 0.91 and 0.97, respectively. Visual inspection of the coupon retrieved after 12 weeks of the test period showed the presence of mosaic deposits of rusty materials on its surface. Linearity between the log of weight-loss and period of exposure showed that the reaction was a first order reaction. The adsorption of rusty materials on the surface of the coupons in batch reactor 1 was due to physiosorption (physical adsorption).
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How to cite this article:

Rim-rukeh Akpofure, Ikhifa O. Grace , E.J. Konyeme and Okokoyo A. Peter , 2006. Corrosion of Low Carbon Steel Influenced by the Presence of Iron-oxidizing Bacteria (Leptothrix discophora). Journal of Applied Sciences, 6: 1338-1342.

DOI: 10.3923/jas.2006.1338.1342

URL: https://scialert.net/abstract/?doi=jas.2006.1338.1342

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