These impedance plots were simulated to an equivalent electric circuit (EEC) model by fitting the experimental spectra. In this EEC model, the properties of biofilm, i.e., charge relaxation and transport through the biofilm are represented as constant phase element (Ybf) and biofilm resistance (Rbf), respectively (Figure ). On the other hand, the dissolution behavior of SS304 was associated with the parallel electrochemical processes i.e., the non-uniform charge distribution in