Table 1.
Electrochemical parameters of 1,2,3-triazoles 1,4-disubstituted in API 5 L X52 steel immersed in HCl 1 M.
| inhibitor | C (ppm) |
Rs (Ω cm2) |
n |
Cdl (μF cm−2) |
Rct (Ω cm2) |
Rmol (Ω cm2) |
η (%) |
χ2 |
|---|---|---|---|---|---|---|---|---|
| blank | 0 | 0.8 | 0.8 | 310.0 | 30 | — | — | — |
| 3 | 5 | 1.1 | 0.72 | 221.9 | 154.0 | 5.1 | 81.1 | 0.0833 |
| 10 | 1.2 | 0.69 | 230.7 | 227.6 | 13.4 | 87.6 | 0.1119 | |
| 20 | 1.0 | 0.67 | 205.1 | 286.1 | 16.2 | 90.1 | 0.1130 | |
| 50 | 1.1 | 0.68 | 195.4 | 343.1 | 17.3 | 91.7 | 0.1052 | |
| 4 | 5 | 1.1 | 0.73 | 228.9 | 49.9 | 9.6 | 49.6 | 0.1447 |
| 10 | 1.3 | 0.75 | 192.8 | 112.4 | 18.9 | 77.2 | 0.1672 | |
| 20 | 1.2 | 0.72 | 193.4 | 168.1 | 19.5 | 84.0 | 0.1415 | |
| 50 | 1.2 | 0.71 | 182.7 | 210.4 | 18.6 | 86.9 | 0.1366 | |
| 5 | 5 | 11.5 | 0.74 | 247.3 | 35.4 | 36.8 | 58.4 | 0.0020 |
| 10 | 8.0 | 0.88 | 214.8 | 68.1 | 16.7 | 64.6 | 0.0016 | |
| 20 | 8.5 | 0.95 | 170.8 | 265.7 | 5.4 | 88.9 | 0.0017 | |
| 50 | 6.3 | 0.62 | 89.9 | 492.8 | 6.7 | 94.0 | 0.0014 | |
| 6 | 5 | 1.0 | 0.70 | 174.4 | 134.5 | 14.4 | 79.9 | 0.1245 |
| 10 | 1.1 | 0.72 | 129.4 | 169.8 | 29.8 | 85.0 | 0.0893 | |
| 20 | 1.1 | 0.68 | 123.2 | 248.4 | 28.7 | 89.2 | 0.1065 | |
| 50 | 1.2 | 0.63 | 108.2 | 335.3 | 29.5 | 91.8 | 0.1065 | |
| 7 | 5 | 1.5 | 0.70 | 172.7 | 201.8 | 5.1 | 85.5 | 0.0024 |
| 10 | 1.0 | 0.65 | 153.4 | 224.1 | 0.5 | 86.6 | 0.0036 | |
| 20 | 0.9 | 0.63 | 158.1 | 272.4 | 2.6 | 89.1 | 0.0045 | |
| 50 | 1.0 | 0.60 | 153.2 | 328.2 | 2.9 | 90.9 | 0.0040 |