Table 3 Electrochemical parameters and inhibition efficiencies investigated from EIS data of the copper metal in 1.0 M HCl solution containing different concentrations of the inhibitor (HL) at 25 °C.
Conc., M | Rs Ω cm2 | Rct Ω cm2 | Q | Cdl μF cm2− | \(IE\%\) | ||
|---|---|---|---|---|---|---|---|
Yo μΩ cm−2 | n | ||||||
Blank | – | 1.350 | 6.590 | 3850 | 0.44 | 17.600 | – |
Various conc. of the inhibitor (HL) | 1 × 10–4 | 1.960 | 14.500 | 2304 | 0.52 | 9.430 | 54.55 |
1 × 10–5 | 2.310 | 46.300 | 1145 | 0.64 | 4.760 | 85.76 | |
1 × 10–6 | 1.120 | 72.400 | 892 | 0.70 | 3.770 | 90.89 | |
1 × 10–7 | 1.160 | 93.200 | 480 | 0.79 | 2.160 | 92.93 | |