Table 4 Electrochemical impedance spectroscopy parameters of MS in 1 M HCl in the absence and presence of different concentrations of 6a and 6b at 298 K.
Inhibitors | Conc (ppm) | Rs (Ω cm2) | Rct (Ω cm2) | Y0 (Ω−1 sn cm−2) | n | Cdl (µF cm−2) | θ | IE EIS % |
|---|---|---|---|---|---|---|---|---|
Blank | 0.0 | 0.5816 | 20.34 | 723.80 | 0.903 | 461.02 | – | – |
6a | 50 | 2.474 | 244.6 | 419 | 0.841 | 272.88 | 0.92 | 91.68 |
100 | 0.619 | 267.9 | 284 | 0.872 | 194.66 | 0.92 | 92.41 | |
200 | 0.787 | 334.8 | 160 | 0.758 | 62.88 | 0.94 | 93.92 | |
500 | 1.038 | 391.6 | 94 | 0.678 | 19.45 | 0.95 | 94.81 | |
6b | 50 | 4.35 | 299.6 | 344 | 0.996 | 341.39 | 0.932 | 93.21 |
100 | 3.37 | 335.9 | 369 | 0.933 | 318.52 | 0.939 | 93.94 | |
200 | 5.25 | 365.8 | 399 | 0.855 | 288.20 | 0.944 | 94.44 | |
500 | 7.17 | 490.6 | 309 | 0.795 | 190.37 | 0.959 | 95.85 |
