Research Article
Anticorrosive Effect of Halogenated Aniline Enaminoesters on Carbon Steel in HCl
Table 2
Electrochemical parameters obtained through EIS tests of AISI 1020 carbon steel in 1.0 mol L-1 HCl medium at different concentration of enaminoesters.
| Inhibitor | Conc. (Mol L-1) | OCP/ag/AgCl (mV) | (Ω cm2) | (Ω cm2) | | | (μF cm2) | (%) |
| Blank | — | — | 51.63 | 6.47 | — | | 537 | — | F-EN | 1.0 × 10-5 | -0.470 | 73.02 | 10.36 | 0.4015 | 0.99 | 28.54 | 40.2 | 1.0 × 10-4 | -0.437 | 140.10 | 9.91 | 0.6583 | 0.96 | 25.20 | 65.8 | 1.0 × 10-3 | -0.432 | 204.61 | 10.18 | 0.7936 | 0.99 | 19.96 | 79.4 | 1.0 × 10-2 | -0.403 | 295.82 | 9.74 | 0.8478 | 0.97 | 15.81 | 85.4 | Cl-EN | 1.0 × 10-5 | -0.500 | 86.91 | 9.69 | 0.4583 | 0.88 | 29.48 | 46.2 | 1.0 × 10-4 | -0.502 | 98.41 | 9.71 | 0.5204 | 0.98 | 27.16 | 52.2 | 1.0 × 10-3 | -0.473 | 231.26 | 10.86 | 0.7476 | 0.89 | 25.76 | 74.8 | 1.0 × 10-2 | -0.462 | 336.85 | 10.21 | 0.8311 | 0.90 | 20.29 | 83.1 | Br-EN | 1.0 × 10-5 | -0.485 | 93.45 | 11.35 | 0.5188 | 0.96 | 9.85 | 52.3 | 1.0 × 10-4 | -0.486 | 109.02 | 11.29 | 0.5786 | 0.97 | 9.37 | 57.9 | 1.0 × 10-3 | -0.477 | 127.76 | 10.88 | 0.6373 | 0.97 | 9.17 | 62.9 | 1.0 × 10-2 | -0.459 | 228.38 | 11.59 | 0.7918 | 0.95 | 9.06 | 79.8 | H-EN | 1.0 × 10-5 | -0.452 | 61.43 | 9.92 | 0.4115 | 0.89 | 125.35 | 41.1 | 1.0 × 10-4 | -0.479 | 93.33 | 10.83 | 0.5189 | 0.92 | 100.26 | 51.9 | 1.0 × 10-3 | -0.466 | 176.86 | 9.05 | 0.7080 | 0.91 | 29.73 | 69.8 | 1.0 × 10-2 | -0.457 | 233.86 | 11.04 | 0.7909 | 0.88 | 19.27 | 79.4 |
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