Evaluation of Corrosion Inhibition of Mild Steel in 1 M Hydrochloric Acid Solution by Mollugo cerviana

Table 2

The electrochemical impedance spectroscopy parameters for mild steel in 1 M HCl solution in the absence and presence of M. cerviana extract at different concentrations.

Concentration of the inhibitor (mg/L)	CPE (𝜇F/cm^2)	𝑅𝑠 (Ω·cm^2)	𝑅𝑝 (Ω·cm^2)	𝑅ct (Ω·cm^2)	% IE	𝜃
Blank	0.09	1.06	050.11	028.67	—	—
25	0.06	1.35	289.78	374.86	92.37	0.92
100	0.04	0.78	381.87	462.20	93.81	0.94
250	0.05	1.17	533.59	621.13	95.36	0.95
500	0.05	1.08	839.67	937.93	96.95	0.97
1000	0.04	0.89	628.67	742.61	96.95	0.97