Ethanol solution of Ocimum basilicum L. oil was studied as corrosion inhibitor for aluminium in 0.5 M HCl. Its inhibition effect was performed using weight loss measurements, potentiodynamic polarization and EIS methods. Potentiodynamic polarization measurements show that presence of basil oil in HCl solution influence on current densities decreasing. EIS results confirmed that investigated compound formed protective layer on aluminium surface. Thermodynamic adsorption parameters show that compounds present in basil oil are adsorbed on aluminium surface by an exothermic process, indicating that the adsorption mechanism is physisorption, with the adsorptive layer having an electrostatic character.
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Halambek et al. (2013) studied this question.
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