Short report of mild steel corrosion in 0.5 M H2SO4 by 4-ethyl-1-(4-oxo-4-phenylbutanoyl)thiosemicarbazide

hiosemicarbazide derivative namely 4-ethyl-1-(4-oxo-4-phenylbutanoyl)thiosemicarbazide which is indicated as EOPT was synthesized and assessed as an inhibitor for the corrosion mild steel (MS) in 0.5 M sulfuric acid, utilizing mass loss measurements. The inhibitive efficacy was found to be dependent on the concentration of EOPT and immersion time, the most significant inhibitive efficacy values 88.7% by gravimetric techniques were reported in the presence of an optimized concentration of EOPT (500 ppm) at 303 K. The adsorption of EOPT molecules on the surface of MS has been explored to understand the mechanism for corrosion prevention, the outcomes showed that the process of adsorption follows Langmuir isotherm, the determined free energy Delta G(ads)(o) value was found to be -36.86 kj mol(-1) which signifies that EOPT molecules are absorbed by through both chemisorption and physisorption mechanism on the MS surface.