Research Article
UAE Neem Extract as a Corrosion Inhibitor for Carbon Steel in HCl Solution
Table 2
Tafel corrosion currents and percentage inhibitions of the aqueous extract of Neem leaves at various concentrations in 1.0 M HCl at room temperature.
| | 1.0 M HCl | 1.0 M HCl + 0.20 g/LExtract of Neem | 1.0 M HCl + 0.50 g/LExtract of Neem | 1.0 M HCl + 1.00 g/LExtract of Neem | 1.0 M HCl + 2.00 g/LExtract of Neem |
| /V versus SCE | −0.465 | −0.438 | −0.433 | −0.472 | −0.583 | /(mV/dec.) | 57.5 | 61.1 | 94.5 | 112.0 | 143.9 | /(mV/dec.) | 63.8 | 56.1 | 87.7 | 77.2 | 76.1 | /mA | 0.76 | 0.237 | 0.169 | 0.151 | 0.101 | PercentInhibition | — | 68.82 | 77.76 | 80.13 | 86.84 |
|
|