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.
Gayosso, M. J. H., Olivares, G. Z., Ordaz, N. R., & Esquivel, R. G. (2005). Evaluation of a biocide effect upon microbiologically influenced corrosion of mild steel. Materials and Corrosion, 624-629. https://doi.org/10.1002/maco.200503867