Examining the effects of tert-butylamine under different circumstances an inhibitor of mild steel corrosion in HCl acid

Abstract

The study explored how well mild steel resists corrosion. For this, tert-butylamine was used in an HCl solution at temperatures between 30, 50 °C and concentrations ranging from 50,200ppm. The research utilized polarization measurements and weight loss techniques to gather data. The findings show that the corrosion inhibitor, tert-butylamine, works best at higher concentrations. However, its effectiveness decreases with increasing temperatures. This inhibitor prevents corrosion by attaching to the surface of the metal and forms shielding layer, and the study assessed various thermodynamic factors, such as entropy, activation energy, free energy of adsorption, and enthalpy, to understand how this protective layer works. Amine and methyl groups within the inhibitor's chemical structure play a crucial role in forming this protective layer. This layer would act as barrier that resists corrosion and helps preserving the metal surface. The efficacy of the inhibitor was confirmed via both the measurement of weight loss as well polarization techniques, aligning well with previous research findings. These results indicate that increasing the concentration of the inhibitor leads to better protection against corrosion.