Research Article
Anticorrosive Effect of Halogenated Aniline Enaminoesters on Carbon Steel in HCl
Table 4
Electrochemical parameters obtained by PP tests for enaminoesters in 1.0 mol L-1 HCl medium in AISI 1020 carbon steel.
| Inhibitor | (Mol L-1) | vs. ag/AgCl (mV) | (mA cm-2) | (mV dec-1) | (mV dec-1) | | (%) |
| Blank | — | -479 | 0.314 | 71.43 | 101.45 | — | — | F-EN | 1.0 × 10-5 | -465.27 | 0.342 | 109.05 | 185.03 | 0.4013 | 40.2 | 1.0 × 10-4 | -440.73 | 0.151 | 75.93 | 199.15 | 0.6175 | 63.9 | 1.0 × 10-3 | -429.32 | 0.154 | 74.87 | 183.24 | 0.7393 | 74.5 | 1.0 × 10-2 | -411.55 | 0.077 | 50.84 | 128.72 | 0.8548 | 84.8 | Cl-EN | 1.0 × 10-5 | -466.51 | 0,262 | 107.32 | 124.19 | 0.4497 | 45.3 | 1.0 × 10-4 | -461.27 | 0.124 | 100.32 | 139.42 | 0.5017 | 50.4 | 1.0 × 10-3 | -468.78 | 0.092 | 79.24 | 135.97 | 0,7709 | 76.8 | 1.0 × 10-2 | -465.21 | 0.080 | 77.12 | 100.78 | 0.8436 | 83.8 | Br-EN | 1.0 × 10-5 | -462.28 | 0.153 | 100.84 | 157.2 | 0.5113 | 51.0 | 1.0 × 10-4 | -461.52 | 0.132 | 102.04 | 156.86 | 0.5781 | 58.9 | 1.0 × 10-3 | -467.85 | 0.112 | 104.04 | 144.05 | 0.6427 | 63.7 | 1.0 × 10-2 | -444.45 | 0.0791 | 84.48 | 105.03 | 0.7481 | 75.3 | H-EN | 1.0 × 10-5 | -434.51 | 0.199 | 101.26 | 139.77 | 0.3939 | 39.4 | 1.0 × 10-4 | -442.34 | 0.151 | 97.22 | 120.96 | 0.5167 | 51.7 | 1.0 × 10-3 | -463.33 | 0.091 | 73.76 | 115.20 | 0.7104 | 71.0 | 1.0 × 10-2 | -450.31 | 0.070 | 59.28 | 107.56 | 0.7764 | 78.9 |
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