Quinoline (QL) and its derivatives namely quinaldine (QLD) and quinaldic acid (QLDA) were tested as inhibitors for the corrosion of steel in 0.5 M HCl by weight loss method at 30 and 40 oC. Inhibition efficiency increased with increase in the concentration of of the studied compounds but decreased with increase in temperature. Results show that the order of inhibition efficiency is QLDA > QLD > QL. The adsorption of the inhibitors on the steel surface obey Langmuir and kinetic thermodynamic models.
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Ebenso et al. (2010) studied this question.
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