Table 3. Electrochemical parameters of Q235 CS from PDP curves in 1.0 mol per L HCl without and with different concentrations of PBT at 298.15 K.
| Inhibitor | C/mmol L−1 | E corr/mV | I corr/μA cm−2 | β a/mV dec−1 | β c/mV dec−1 | η |
|---|---|---|---|---|---|---|
| PBT | Blank | −434.7 ± 0.0 | 387.9 ± 4.2 | 76.4 ± 2.2 | −108.7 ± 3.7 | |
| 0.005 | −476.3 ± 1.2 | 144.3 ± 11.5 | 55.0 ± 2.0 | −103.8 ± 0.3 | 62.8% | |
| 0.01 | −477.7 ± 4.7 | 80.6 ± 7.5 | 48.4 ± 1.2 | −105.9 ± 2.7 | 79.2% | |
| 0.05 | −483.3 ± 4.0 | 47.3 ± 3.0 | 75.6 ± 21.7 | −108.6 ± 2.4 | 87.8% | |
| 0.25 | −481.3 ± 3.1 | 39.7 ± 1.8 | 54.6 ± 11.0 | −106.5 ± 0.5 | 89.8% | |
| 1.0 | −480.3 ± 2.9 | 33.5 ± 0.8 | 61.7 ± 17.7 | −106.9 ± 3.5 | 91.4% |