Electrochemical cell impedance spectra at Eoc

The dataset presents impedance spectrum of electrochemical cell filled with 3% NaCl solution presented in the figure below. This cell was used measured using Atlas-Sollich 0531 impedance analyser with built-in potentiostat. When changing the DC polarisation of the cell the non-linear phenomena could be observed. The impedance spectrum frequency range (10 mHz – 100 kHz) was selected. At this dataset the DC polarisation was set to Eoc (open circuit potential) + 0mV. Figure top-left presents impedance modulus and Figure top-right presents impedance angle for the cell presented in Figure bottom-left for different DC polarisation, in this dataset for Eoc + 0 mV.
The cell is filled with 3% solution of NaCl, the carbon steel working electrode was used, the counter electrode was made with platinium mesh and silver chloride reference electrode was applied.