Figure 4

EIS Spectra for the behavior of API 5 L X60 mild steel in 3.5% CO2 saturated NaCl with and without TBA at 25 °C (a) Nyquist plot; pH = 4 (b) Nyquist plot; pH = 6 (c) Bode plot; pH = 4 and (d) Bode plot; pH = 6.

EIS Spectra for the behavior of API 5 L X60 mild steel in 3.5% CO2 saturated NaCl with and without TBA at 25 °C (a) Nyquist plot; pH = 4 (b) Nyquist plot; pH = 6 (c) Bode plot; pH = 4 and (d) Bode plot; pH = 6.