Investigation of the inhibitive effect of ortho-substituted anilines on corrosion of iron in 1 M HCl solutions |
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Authors: | KF Khaled N Hackerman |
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Affiliation: | Chemistry Department, Rice University, Houston, TX 77005, USA |
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Abstract: | The inhibitory activity of some o-substituted anilines on iron corrosion in hydrochloric acid (HCl) was studied in relation to inhibitor concentration using potentiodynamic and electrochemical impedance spectroscopy (EIS) measurements. O-substituted anilines were found to act as mixed type inhibitors. The results showed that o-substituted anilines suppressed both cathodic and anodic processes of iron corrosion in 1 M HCl by its adsorption on the iron surface according to Langmuir adsorption isotherm. Potentiodynamic and EIS measurements reveal that these compounds inhibit the iron corrosion in 1 M HCl and that the efficiency increases with increasing of the inhibitor concentration. Data obtained from EIS are analyzed to model the corrosion inhibition process through equivalent circuit. |
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Keywords: | Iron Polarization EIS Acid inhibition |
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