Abstract
Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry optimization of LHP was performed and the time-dependent density functional theory was utilized to calculate the electronic absorption spectra. Finally, frequency calculations were, also, performed on the optimized geometry.
Highlights
When the testing temperature increased to 80 °C, a slight decline in efficiency was noted, due to the increased rate of iron dissolution in the acidic brine and the expected desorption of the attached inhibitor from the metallic substrate
An inhibition efficiency of more than 94% was successfully achieved upon the addition of the candidate inhibitor to a concentration of 370 μmol L−1
The molecular simulation of laurhydrazide N′-propan-3-one (LHP) proved that the 100-iron surface will have better coverage compared to the surface, while the surface will have the weakest coverage
Summary
Laurhydrazide N′-propan-3-one (LHP) is tested as an inexpensive and highly efficient green inhibitor for the corrosion of mild steel (MS) in 16% HCl solution (5 M) at various temperatures using the potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. Immersion tests were conducted to quantify the effect of the corrosive acidic medium on the MS electrode and to study the surface topography before and after the addition of the LHP inhibitor.
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