Table 2. Electrochemical Parameters from the LPR and PDP of API 5L X60 Steel in 1 M H2SO4–CIs at 25 °C.
| CINH | Rp | –βc | –Ecorr | icorr | vcorr | IELPR | IEPDP | |
|---|---|---|---|---|---|---|---|---|
| CI | ppm/mM | Ω cm2 | mV dec–1 | mV/Ag/AgCl | μA cm–2 | mm year–1 | % | |
| blank | 0/0 | 35 ± 2 | 130 ± 3 | 470 ± 4 | 548 ± 24 | 6.36 ± 2.84 | - | - |
| poly[VIMC4][Im] | 25/3.5 × 10–5 | 71 ± 1 | 124 ± 3 | 449 ± 2 | 241 ± 22 | 2.80 ± 0.25 | 51 ± 1 | 56 ± 4 |
| 50/7.1 × 10–5 | 80 ± 4 | 127 ± 1 | 455 ± 1 | 234 ± 17 | 2.72 ± 0.20 | 56 ± 2 | 57 ± 3 | |
| 75/1.1 × 10–4 | 96 ± 3 | 142 ± 3 | 454 ± 1 | 207 ± 4 | 2.40 ± 0.05 | 64 ± 1 | 62 ± 1 | |
| 100/1.4 × 10–4 | 117 ± 2 | 141 ± 1 | 462 ± 1 | 124 ± 6 | 1.44 ± 0.07 | 70 ± 1 | 77 ± 1 | |
| 125/1.8 × 10–4 | 131 ± 1 | 133 ± 2 | 446 ± 1 | 126 ± 11 | 1.46 ± 0.13 | 73 ± 1 | 77 ± 2 | |
| 150/2.1 × 10–4 | 137 ± 8 | 136 ± 4 | 451 ± 1 | 151 ± 10 | 1.75 ± 0.12 | 75 ± 1 | 72 ± 2 | |
| 175/2.5 × 10–4 | 142 ± 5 | 135 ± 2 | 445 ± 1 | 125 ± 16 | 1.45 ± 0.19 | 76 ± 1 | 77 ± 3 | |
| 200/2.8 × 10–4 | 141 ± 4 | 141 ± 1 | 451 ± 1 | 152 ± 3 | 1.77 ± 0.03 | 75 ± 1 | 72 ± 1 | |
| poly[VIMC2][Br] | 25/4.1 × 10–5 | 59 ± 2 | 130 ± 2 | 450 ± 1 | 301 ± 21 | 3.50 ± 0.24 | 41 ± 2 | 46 ± 4 |
| 50/8.1 × 10–5 | 72 ± 1 | 126 ± 3 | 450 ± 1 | 268 ± 20 | 3.12 ± 0.23 | 52 ± 1 | 51 ± 4 | |
| 75/1.2 × 10–4 | 91 ± 5 | 124 ± 1 | 450 ± 1 | 193 ± 9 | 2.24 ± 0.10 | 62 ± 2 | 65 ± 2 | |
| 100/1.6 × 10–4 | 132 ± 6 | 125 ± 1 | 454 ± 1 | 142 ± 10 | 1.65 ± 0.11 | 74 ± 1 | 74 ± 2 | |
| 125/2.0 × 10–4 | 134 ± 10 | 119 ± 2 | 454 ± 2 | 138 ± 15 | 1.60 ± 0.17 | 74 ± 2 | 75 ± 3 | |
| 150/2.4 × 10–4 | 143 ± 1 | 118 ± 1 | 455 ± 2 | 121 ± 5 | 1.41 ± 0.06 | 76 ± 1 | 78 ± 1 | |
| 175/2.8 × 10–4 | 165 ± 12 | 121 ± 2 | 455 ± 1 | 90 ± 9 | 1.05 ± 0.11 | 79 ± 1 | 84 ± 2 | |
| 200/3.3 × 10–4 | 144 ± 18 | 120 ± 2 | 450 ± 1 | 116 ± 13 | 1.34 ± 0.15 | 76 ± 3 | 79 ± 2 | |
| poly[VIMC4][Br] | 25/3.5 × 10–5 | 73 ± 1 | 121 ± 5 | 453 ± 1 | 212 ± 24 | 2.47 ± 0.28 | 52 ± 1 | 61 ± 4 |
| 50/7.0 × 10–5 | 98 ± 6 | 126 ± 2 | 456 ± 1 | 190 ± 14 | 2.21 ± 0.16 | 64 ± 2 | 65 ± 2 | |
| 75/1.0 × 10–4 | 101 ± 3 | 128 ± 6 | 456 ± 2 | 183 ± 25 | 2.13 ± 0.29 | 66 ± 1 | 67 ± 5 | |
| 100/1.4 × 10–4 | 132 ± 3 | 137 ± 1 | 455 ± 1 | 138 ± 8 | 1.61 ± 0.10 | 74 ± 1 | 75 ± 1 | |
| 125/1.7 × 10–4 | 140 ± 3 | 121 ± 1 | 456 ± 2 | 116 ± 5 | 1.34 ± 0.06 | 75 ± 1 | 79 ± 1 | |
| 150/2.1 × 10–4 | 145 ± 1 | 123 ± 1 | 458 ± 1 | 105 ± 3 | 1.22 ± 0.04 | 76 ± 1 | 81 ± 1 | |
| 175/2.4 × 10–4 | 178 ± 10 | 118 ± 2 | 458 ± 2 | 82 ± 7 | 0.95 ± 0.09 | 80 ± 1 | 85 ± 1 | |
| 200/2.8 × 10–4 | 139 ± 16 | 115 ± 9 | 451 ± 1 | 98 ± 9 | 1.14 ± 0.10 | 75 ± 2 | 82 ± 2 | |