Evaluation of the inhibitor effect of new class triazole derivatives on the
corrosion of ordinary steel in hydrochloric acid solution

Y. Elkhotfi; I. Forsal; E. M. Rakib; B. Mernari

Abstract

Evaluation of the inhibitor effect of new class triazole derivatives on the corrosion of ordinary steel in hydrochloric acid solution

Author(s): Y. Elkhotfi, I. Forsal, E. M. Rakib and B. Mernari

The corrosion inhibition properties of a new class of triazole derivatives, namely (RS) – 2 – (2, 4 dichlorophenyl) 1 – (1H) – 1, 2, 4 triazol 1 – yl) hexane 2 OL (Hexaconazole) and 1 – ((4 – Bromo – 2 – (2, 4 –dichlorophenyle tetra hydro- 2 – furanyle) methyl) – 1 H – 1, 2, 4, - triazole (Bromuconazole) on ordinary steel in 1M HCl medium were investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarisation and weight loss measurements. The obtained results showed that these compounds are excellent inhibitors for ordinary steel in hydrochloric acid solution 1M and that the protection efficiency increases with increasing inhibitors concentration. Leading to the formation of a protective layer with a greater polarization resistance. The effect of temperature on the corrosion behaviour ordinary steel in acid solution with addition of 10-3 mol/l of Hexaconazole and addition of 10-3 mol/l of Bromuconazole were studied in the temperature range from 25C° to 50C°. Adsorption of Hexaconazole on the steel surface obeys to the Langmuir’s isotherm. And adsorption of Bromuconazole on the steel surface obeys to the Temkin’s isotherm. The apparent activation energies are calculated and discussed.

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