Abstract
Nondestructive electrochemical techniques were used to investigate the microbiologically influenced corrosion (MIC) by Sulfate Reducing Bacteria (SRB) corrosion of API 5L X65 linepipe steel. These techniques included Electrochemical Impedance Spectroscopy (EIS), open circuit potential (OCP) and linear polarization resistance (Rp). OCP trend showed anodic polarization of 67 mV between the biotic media with reference to abiotic media. These shifts were attributed to the cathodic side reactions produced by the metabolic activity of SRB. Through circuit modeling, EIS results were used to interpret the real time interactions between the electrode, biofilm and solution interfaces.
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