Table 2 Data deducted from Tafel extrapolation of C&S in 1 M HCl uninhibited and inhibited with different concentrations of Tetra-Pz-Ortho and Tetra-Pz-Para in 1 M HCl at 303 K.
Medium | Conc. (M) | -Ecorr (mV vs. SCE) | icorr (µA cm−2) | -βc | βa | ηpp (%) |
|---|---|---|---|---|---|---|
HCl | Blank | 456.3 | 1104 | 112 | 155.4 | – |
Tetra-Pz-Ortho | 10−3 | 466.0 | 30.8 | 156.5 | 76.6 | 97.2 |
10−4 | 461.9 | 53.3 | 151.2 | 76.0 | 95.2 | |
10−5 | 442.0 | 114.7 | 147.5 | 61.6 | 89.6 | |
10−6 | 483.1 | 199.3 | 105.3 | 85.0 | 81.9 | |
Tetra-Pz-Para | 10−3 | 477.4 | 44.2 | 78.0 | 88.4 | 96.0 |
10−4 | 478.6 | 68.6 | 91.1 | 71.4 | 93.8 | |
10−5 | 469.2 | 136.7 | 143.5 | 69.3 | 87.6 | |
10−6 | 480.1 | 266.1 | 153.2 | 89.3 | 75.9 |
