Computational Calculations, Gravimetrical, and Surface Morphological Investigations of Corrosion Inhibition Effect of Triazole Derivative on Mild Steel in HCl
Shaimaa B. Al-Baghdadi, Ahmed A. Al‐Amiery, Abdul Amir H. Kadhum, Mohd Sobri Takriff
Abstract
The inhibition efficiency of the novel synthesized corrosion inhibitor namely, 5,5′-(1,4-phenylene)bis(3-mercapto-4-methyl-1,2,4-triazole) (PBMMT) have been studied for mild steel in 1 M hydrochloric acid environment by using gravimetric techniques. PBMMT show high inhibition efficiency at 0.5 mM. The adsorption isotherm of the investigated inhibitor on the surface of mild steel obeys Langmuir adsorption isotherm. The surface morphology was tested by scanning electron microscopy (SEM) in the absence and presence of PBMMT as corrosion inhibitor. The results show that the mild steel surface in presence of PBMMT 0.5 mM was smooth and uncorroded in 1 M HCl solution. Quantum chemical calculations were quite fitted with the experimental findings.