Table 1 EIS parameters associated with impedance curves for of C-steel in 2.0 M H2SO4 solution with and without Irish ivy extract (IIE) at 298 K under dynamic conditions.
IIE extract (g L-1) | Rs Ω cm2 M ± SD | Rct Ω cm2 M ± SD | Cdl μF cm-2 M ± SD | χ2 | n | ηR% |
|---|---|---|---|---|---|---|
Blank 0.1 0.2 0.3 0.4 0.5 | 0.48 ± 0.02 0.51 ± 0.02 0.54 ± 0.02 0.58 ± 0.01 0.62 ± 0.02 0.72 ± 0.02 | 13.34 ± 1.12 58.07 ± 1.24 67.34 ± 1.78 88.49 ± 2.53 171.43 ± 2.54 232.25 ± 3.04 | 274 ± 2.3 236 ± 2.1 179 ± 2.2 93 ± 1.8 69 ± 1.3 87 ± 1.3 | 1.7 × 10−3 1.6 × 10−3 1.0 × 10−3 1.2 × 10−3 1.9 × 10−3 1.7 × 10−3 | 0.82 0.91 0.92 0.93 0.93 0.93 | - 77.0 80.2 85.0 92.2 94.2 |
