Table 2. EIS Results in CO2–Saturated Solution without and with an Inhibitor.
| CPEf |
CPEdl |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| inhibitor | C (ppm) | Rs (Ω·cm2) | Y0 (Ω–1 cm–2 Sn) | n | Rf (Ω·cm2) | Y0 (Ω–1 cm–2 sn) | n | Rct (Ω·cm2) | Rp (Ω·cm2) | ηz% | χ2 × 10–4 |
| blank | 0 | 61.5 ± 1.2 | 1.7 ± 0.1 × 10–4 | 0.86 ± 0.05 | 3.3 ± 1.5 | 1.3 ± 0.5 × 10–4 | 0.84 ± 0.11 | 136.0 ± 6.5 | 139.3 ± 4.7 | 1.36 | |
| 2-FFT | 1.0 | 62.8 ± 5.6 | 7.4 ± 0.2 × 10–5 | 0.89 ± 0.01 | 67.6 ± 12.8 | 1.4 ± 0.2 × 10–4 | 0.76 ± 0.20 | 302.4 ± 14.1 | 370.0 ± 13.6 | 62.4 | 1.35 |
| 2.5 | 59.4 ± 7.9 | 1.1 ± 0.3 × 10–4 | 0.86 ± 0.02 | 268.9 ± 43.8 | 3.0 ± 1.0 × 10–4 | 0.84 ± 0.09 | 477.8 ± 25.7 | 746.7 ± 33.8 | 81.3 | 2.21 | |
| 5.0 | 62.7 ± 2.6 | 1.2 ± 0.5 × 10–4 | 0.86 ± 0.03 | 278.3 ± 55.7 | 1.4 ± 0.5 × 10–4 | 0.84 ± 0.10 | 750.6 ± 55.1 | 1028.9 ± 55.5 | 86.5 | 2.27 | |
| 7.5 | 63.3 ± 2.4 | 3.2 ± 0.2 × 10–4 | 0.76 ± 0.15 | 1467.0 ± 237.0 | 8.9 ± 0.4 × 10–4 | 1.00 ± 0.00 | 109.2 ± 12.5 | 1576.2 ± 100.8 | 91.2 | 1.14 | |
| 10.0 | 63.8 ± 5.5 | 1.4 ± 0.1 × 10–4 | 0.85 ± 0.04 | 1481.0 ± 158.5 | 1.7 ± 0.2 × 10–4 | 0.93 ± 0.04 | 1311.0 ± 264.6 | 2792.0 ± 208.4 | 95.0 | 2.71 | |
| DFDS | 1.0 | 60.7 ± 6.3 | 8.6 ± 0.6 × 10–5 | 0.90 ± 0.01 | 478.1 ± 51.7 | 2.1 ± 0.7 × 10–4 | 0.70 ± 0.28 | 797.5 ± 36.4 | 1275.6 ± 47.5 | 89.1 | 2.19 |
| 2.5 | 60.6 ± 7.4 | 1.2 ± 0.2 × 10–4 | 0.88 ± 0.02 | 1120.0 ± 100.0 | 1.8 ± 0.5 × 10–4 | 0.79 ± 0.19 | 2071.0 ± 147.8 | 3191.0 ± 125.8 | 95.6 | 2.63 | |
| 5.0 | 60.6 ± 8.5 | 4.6 ± 0.4 × 10–5 | 0.90 ± 0.02 | 2088.0 ± 217.7 | 1.3 ± 0.5 × 10–4 | 0.79 ± 0.14 | 2674.0 ± 124.3 | 4762.0 ± 187.1 | 97.1 | 1.61 | |
| 7.5 | 56.9 ± 7.8 | 3.0 ± 0.2 × 10–5 | 0.92 ± 0.01 | 4791.0 ± 259.3 | 1.2 ± 0.1 × 10–4 | 0.86 ± 0.08 | 1996.0 ± 210.2 | 6787.0 ± 233.7 | 97.9 | 2.17 | |
| 10.0 | 59.5 ± 6.1 | 2.6 ± 0.1 × 10–5 | 0.91 ± 0.02 | 5715.0 ± 184.8 | 5.3 ± 0.2 × 10–5 | 0.72 ± 0.22 | 1843.0 ± 117.1 | 7558.0 ± 174.7 | 98.2 | 1.38 | |