Research Article
Comparative Corrosion Inhibition Effect of Imidazole Compounds and of Trichodesma indicum (Linn) R. Br. on C38 Steel in 1 M HCl Medium
Table 2
Inhibition studies of plant extract.
| Extract concentration (mg/L) | 30°C | 40°C | 50°C | 60°C | C.R × 101 mmpy | IE (%) | Surface coverage (θ) | C.R × 101 mmpy | IE (%) | Surface coverage (θ) | C.R × 101 mmpy | IE (%) | Surface coverage (θ) | C.R × 101 mmpy | IE (%) | Surface coverage (θ) |
| 0 | 0.2196 | — | — | 0.3599 | — | — | 0.5113 | — | — | 0.6516 | — | — | 25 | 0.035 | 72.5 | 0.9315 | 0.234 | 60.8 | 0.3498 | 0.144 | 70.5 | 0.343 | 0.1712 | 52.2 | 0.7373 | 50 | 0.033 | 80.3 | 0.9355 | 0.212 | 76.4 | 0.4109 | 0.1402 | 76.2 | 0.3615 | 0.1532 | 68 | 0.7648 | 75 | 0.026 | 97.5 | 0.9491 | 0.142 | 79.2 | 0.6054 | 0.038 | 88.6 | 0.8269 | 0.082 | 74 | 0.8742 | 100 | 0.031 | 86.2 | 0.9393 | 0.1608 | 86.4 | 0.5532 | 0.0889 | 84 | 0.5952 | 0.1164 | 70.5 | 0.8214 |
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