International Journal of Corrosion / 2011 / Article / Tab 1

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 1

Corrosion parameters obtained from weight loss measurements for mild steel in 1N HCl containing various concentrations of the plant extracts.

Name of the plant extractConc. of the extract (% in v/v)Corrosion rate (mmpy)Inhibition efficiency (%)Surface coverage (θ)

Ocimum sanctumBlank30.67
2.02.3992.20.9221
4.01.1096.40.9641
6.00.1299.60.9961
8.01.0896.50.9648
10.01.3295.70.9570

Aegle marmelosBlank30.67
2.03.8187.60.8758
4.03.0390.10.9012
6.02.0293.40.9341
8.00.7697.50.9752
10.00.7697.50.9752

Solanum trilobatumBlank30.67
2.012.7558.40.5843
4.08.4272.50.7255
6.06.5978.50.7851
8.05.2183.00.8301
10.03.0090.20.9022

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