Evaluation of a biocide effect upon microbiologically influenced corrosion of mild steel

M. J.Hernández Gayosso, G. Zavala Olivares, N. Ruiz Ordaz, R. Garcia Esquivel

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11 Scopus citations


The microbiologically influenced corrosion (MIC) is a very dangerous process, which affects the oil industry. The activity and microorganisms' growth at the pipelines steel cause surface modifications, which can induce a more complex corrosion process. The biocide evaluation for the MIC decrease has been normally based upon microbiological tests, and just a few references mention alternating methods which can be used as criteria for their evaluation. In this work, a commercial biocide was tested, using different electrochemical laboratory techniques, to determine its effect upon a biofilm generating bacteria consortium. Using microbiological techniques, the biocide lethal concentration was determined, and a concentration of 200 ppm was used to kill completely the consortium population in both, plancktonic and sessile parts. The electrochemical techniques: Polarisation Resistance (PR) and Electrochemical Impedance Spectroscopy (EIS), allowed describing the corrosion process associated to the microbial consortium and the biocide effect upon it. © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageAmerican English
Pages (from-to)624-629
Number of pages561
JournalMaterials and Corrosion
StatePublished - 1 Sep 2005


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