MIC is usually interpreted as the process which is associated with the accelerated dissolution of metallic surface underlying extracellular polymeric substance (EPS) layer containing biofilm produced by the biological activity of the bacteria strain . On the other hand, some microbes are considered beneficial to inhibit corrosion in natural environments due to the barrier characteristics of the biofilms and their tendency to avoid cathodic depolarization . Mostly, due to the corrosion process, the dissolved ionic species could disturb the barrier characteristics of the EPS and the MIC is accelerated in the presence of microbial biofilms . Microbiologically influenced corrosion inhibition (MICI) is important and is promoted by two types of mechanisms.