Monitoring Method for Microbially Influenced Corrosion of Steel Material Immersed in Underground Water

Abstract

Recently, the monitoring method is required in order to estimate the corrosion rate strictly for timely repairing and renewal of underground steel structures.
In this study, the monitoring method for microbially influenced corrosion with Sulfate-reducing Bacteria (SRB) of steel material immersed in underground water was investigated. It was found that the polarization resistance method with constant direct current, to impress larger current and longer time than the conventional method, could be used in such environment. It was also found that the coefficient to convert the reciprocal of polarization resistance to the corrosion rate was approximately 2mV, which was about 10% of the conventional coefficient.