Review Article
Corrosion Inhibition of Carbon Steel in HCl Solution by Some Plant Extracts
Table 6
Electrochemical impedance, Tafel, and linear polarization resistance data at 308 K.
| | Name of inhibitor | Inhibitor concentration | (Ω cm2) | (μF cm−2) | E (%) | (mV versus SCE) | (mA/cm2) | E (%) |
| | 1 M HCl | — | 8.5 | 68.9 | — | 446 | 1540.0 | — |
| | Terminalia arjuna | 300.0 | 17.0 | 67.4 | 50.5 | 478 | 785.0 | 49.0 | | 600.0 | 26.2 | 48.9 | 67.9 | 461 | 713.0 | 53.7 | | 1200.0 | 75.9 | 38.8 | 88.9 | 469 | 220.0 | 85.7 |
| | Ficus religiosa | 300.0 | 28.7 | 63.9 | 70.7 | 444 | 407.0 | 54.0 | | 600.0 | 37.8 | 63.0 | 77.7 | 481 | 301.0 | 80.4 | | 1200.0 | 75.6 | 37.6 | 88.8 | 464 | 190.0 | 87.6 |
| | Bacopa monnieri | 240.0 | 41.9 | 53.5 | 79.9 | 464 | 518.0 | 66.3 | | 300.0 | 74.2 | 44.2 | 88.6 | 486 | 218.0 | 85.8 | | 600.0 | 175.2 | 39.4 | 95.2 | 489 | 75.0 | 95.1 |
|
|
