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. ΔGads 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 ΔGads was less than 40 kJmol−1, indicating electrostatic interaction between the charged inhibitor molecules and the charged metal surface, i.e., physical adsorption.
کلید واژگان :Corrosion inhibition, Basic yellow 13 dye, Adsorption, Langmuir isotherm
ارزش ریالی : 600000 ریال
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