Abstract
One of the encourager amino acid compounds "Tyrosine" can be used as a safe corrosion inhibitor. The inhibition effect of tyrosine on carbon steel in 1 M HCl was investigated using electrochemical measurements: (electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) technique). The effectiveness of the inhibitor was studied as a function of temperature using chemical technique. The results showed that tyrosine could work as effective corrosion inhibitor and the inhibition efficiency was increased with increasing the tyrosine concentration. The inhibition efficiency of carbon steel was decreased with an increase in temperature. Computational chemistry using DFT/B3LYP/6–31+G (d, p) was used to investigate the relative corrosion inhibition performance of tyrosine. The molecular dynamic simulation (MD) has emerged as a modern tool to investigate the adsorption mechanism of tyrosine on carbon steel, Fe (1 1 0) surface. The calculated quantum chemical descriptors gave a good explanation for the experimental results.
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