Table 3 Electrochemical parameters of impedance for mild steel in 1 M H 2 SO 4 solution in the inhibitor different concentrations at 25 ± 2°C in static conditions
Concentration (ppm) | EIS | LPR | ||||||
|---|---|---|---|---|---|---|---|---|
Rs(ohm.cm2) | Rct(ohm.cm2) | P(μFcm−2) | n | Cdl(μFcm−2) | η% | Rp(ohm.cm2) | η% | |
Blank | 0.89 | 11.9 | 860 | 0.89 | 1,085 | - | 65 | - |
50 | 0.79 | 17.38 | 540 | 0.89 | 731 | 32 | 89 | 27 |
200 | 0.85 | 21 | 410 | 0.85 | 506 | 43 | 103 | 37 |
400 | 1.3 | 45.5 | 290 | 0.88 | 378 | 74 | 220 | 70 |
600 | 1.4 | 54.4 | 130 | 0.88 | 377 | 78 | 258 | 75 |