327-329<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Microbiologically
influenced corrosion (MIC) of mild steel samples were studied in two different
bacterial strains, Pseudomonas fiuorescens and Desulphovibrio
vulgaris, isolated from cutting oil emulsions by potentiostatic
polarization technique. The relationship between the corrosion behaviour and
presence of biofilm on mild steel samples were determined. Bacteria were mixed
with corrosion products hindering the formation of a protective layer. In both
media, anodic depolarization was observed in the presence of ferric iron
reducing bacteria. Anodic depolarization was achieved by the bacterial
reduction of ferric to ferrous compounds. In the absence of the bacteria, both
anode and cathode were polarized.</span