International Journal of Corrosion / 2011 / Article / Tab 4

Research Article

A Comparative Study of the Inhibitory Effect of the Extracts of Ocimum sanctum, Aegle marmelos, and Solanum trilobatum on the Corrosion of Mild Steel in Hydrochloric Acid Medium

Table 4

Impedance parameters for the corrosion of mild steel in 1N HCl in the absence and presence of various concentrations of the plant extracts at 30°C.

Name of the plant extractConc. of extract (% in v/v) (Ω cm2) (μF/cm2)Inhibition efficiency (%)

Blank7.58285.34
Ocimum sanctum2.0110.9119.3493.2
4.0253.868.4497.0
6.0358.806.0097.9
8.0274.997.9597.2
10.0239.259.0296.8

Aegle marmelos2.069.8531.0989.1
4.088.4124.5291.4
6.0136.4915.8694.4
8.0224.809.6296.6
10.0208.3410.2596.4

Solanum trilobatum2.018.62116.0259.3
4.027.3479.0072.3
6.037.1258.3579.6
8.048.3144.7284.3
10.087.8624.5291.4

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