Electrochemical Study of Corrosion Inhibition Behavior of Dehydroabietylamine Against Mild Steel in 1 M HCl

Using potentiodynamic polarization technique, this study analyzed the corrosion inhibitory effect of dehydroabietylamine (DHAA) against mild steel in 1 M HCl. The inhibitor concentration and temperature effects were studied as well. According to these results, the efficiency of inhibition increased with the increase in the concentration of corrosion inhibitor and declined when the temperature increased. A calculation was made to determine the activation and kinetic parameters of the corrosion reaction and adsorption. The inhibitor surficial adsorption on the mild steel followed the Frumkin adsorption isotherm. A physical adsorption mechanism was suggested given the activation energy E-a and Gibbs free energy of adsorption Delta G(ads)degrees values. Atomic force microscopy (AFM) and energy-dispersive X-ray spectroscopy (EDX) techniques were used to investigate the mild steel surface after and before being exposed to 1 M HCl in absence/presence of an inhibitor.

Automated summary

In this study, the corrosion inhibitory effect of dehydroabietylamine (DHAA) on mild steel in 1 M HCl was analyzed using potentiodynamic polarization technique. The concentration and temperature effects of the inhibitor were also investigated. The results showed that the efficiency of inhibition increased with increasing inhibitor concentration but decreased with increasing temperature. The surface of the mild steel was studied using atomic force microscopy (AFM) and energy-dispersive X-ray spectroscopy (EDX) techniques both before and after exposure to 1 M HCl with and without the inhibitor.