Table 2.
PDP data for CS in 4 M HCl free and containing various concentrations of the prepared inhibitors at room temperature.
| Inh | Conc. M | βa (mV/dec) | -βc (mV/dec) | -Ecorr (mV) | icorr (mA) |
r (mm/year) |
θ |  |
|---|---|---|---|---|---|---|---|---|
| – | Blank | 141.90 | 224.80 | 440.55 | 23.60 | 274.18 | – | – |
| DCSM-8 | 1 × 10–6 | 179.30 | 255.20 | 432.92 | 2.812 | 32.82 | 0.88084 | 88.084 |
| 1 × 10–5 | 180.40 | 254.20 | 432.61 | 2.394 | 27.73 | 0.89855 | 89.855 | |
| 5 × 10–5 | 181.90 | 252.50 | 476.21 | 2.057 | 23.66 | 0.91283 | 91.28 | |
| 1 × 10–4 | 182.10 | 250.90 | 448.66 | 1.891 | 21.95 | 0.91987 | 91.987 | |
| 5 × 10–4 | 183.50 | 249.30 | 429.72 | 1.684 | 19.85 | 0.92864 | 92.864 | |
| 1 × 10–3 | 176.10 | 235.50 | 451.07 | 1.424 | 16.88 | 0.93966 | 93.966 | |
| DCSM-10 | 1 × 10–6 | 138.80 | 240.20 | 442.04 | 2.727 | 31.42 | 0.88444 | 88.444 |
| 1 × 10–5 | 138.70 | 239.00 | 498.82 | 2.254 | 26.25 | 0.90449 | 90.449 | |
| 5 × 10–5 | 140.60 | 236.40 | 459.02 | 2.002 | 22.68 | 0.91516 | 91.516 | |
| 1 × 10–4 | 144.50 | 234.90 | 440.22 | 1.791 | 20.49 | 0.9241 | 92.411 | |
| 5 × 10–4 | 144.90 | 232.10 | 507.36 | 1.558 | 18.08 | 0.93398 | 93.398 | |
| 1 × 10–3 | 145.40 | 238.90 | 496.52 | 1.309 | 15.27 | 0.94453 | 94.453 | |
| DCSM-12 | 1 × 10–6 | 199.80 | 270.80 | 543.64 | 2.286 | 26.74 | 0.90313 | 90.313 |
| 1 × 10–5 | 149.20 | 267.00 | 536.99 | 2.041 | 23.53 | 0.91351 | 91.351 | |
| 5 × 10–5 | 170.40 | 250.30 | 558.99 | 1.595 | 18.26 | 0.93241 | 93.241 | |
| 1 × 10–4 | 120.20 | 279.40 | 553.87 | 1.112 | 12.78 | 0.95288 | 95.288 | |
| 5 × 10–4 | 121.00 | 256.90 | 560.76 | 0.902 | 10.46 | 0.96178 | 96.177 | |
| 1 × 10–3 | 155.40 | 273.00 | 570.52 | 0.701 | 8.13 | 0.97029 | 97.029 |