Corrosion inhibition of mild steel in acidic media by Basic yellow 13 dye |
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Authors: | H Ashassi-Sorkhabi B Masoumi P Ejbari E Asghari |
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Affiliation: | (1) Electrochemical Research Laboratory, Physical Chemistry Department, Faculty of Chemistry, University of Tabriz, Tabriz, Iran;(2) Payam-Noor University of Tabriz, Tabriz, Iran |
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Abstract: | The inhibition performance of Basic yellow 13 dye on mild-steel corrosion in hydrochloric acid solution was studied at 25 °C
using weight loss and electrochemical techniques. The effect of inhibitor concentration on inhibition efficiency has been
studied. Inhibition efficiency increased with increase of Basic yellow 13 concentration. The results showed that this inhibitor
had good corrosion inhibition even at low concentrations (95% for 0.005 M Basic yellow 13) and its adsorption on mild-steel
surface obeys Langmuir isotherm. ΔG
ads was calculated and its negative value indicated spontaneous adsorption of the Basic yellow 13 molecules on the mild-steel
surface and strong interaction between inhibitor molecules and metal surface. The value of ΔG
ads was less than 40 kJmol−1, indicating electrostatic interaction between the charged inhibitor molecules and the charged metal surface, i.e., physical
adsorption. |
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Keywords: | Corrosion inhibition Basic yellow 13 dye Adsorption Langmuir isotherm |
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