International Journal of Corrosion / 2011 / Article / Tab 3

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 3

Potentiodynamic polarization parameters for mild steel in 1N HCl containing various concentrations of the plant extracts.

Name of the plant extractConc. of extract (% in v/v) (V) (mA/cm2)Tafel slope mV/decadeInhibition efficiency (%)

Blank−0.5103.5778122
Ocimum sanctum2.0−0.5150.247412693.3
4.0−0.4980.127612496.6
6.0−0.4960.017412499.7
8.0−0.4990.097412297.5
10.0−0.5000.127612496.6

Aegle marmelos2.0−0.4930.407812688.5
4.0−0.4920.317612491.3
6.0−0.4970.217412294.1
8.0−0.4830.097412297.5
10.0−0.4920.097612497.5

Solanum trilobatum2.0−0.4901.457412659.4
4.0−0.4800.977612872.8
6.0−0.4620.757412679.0
8.0−0.4590.567813084.3
10.0−0.4600.337612890.8

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