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Abstarct: N, N- dimethyl-N-(2-phenoxyethyl) dodecan-1-aminiumbromide has been evaluated as a corrosion inhibitor for mild steel in 1MHCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy and atomic force microscope and Scanning electron microscope measurements. According to the experimental results, inhibition efficiency increased with increasing inhibitor concentration. Potentiodynamic measurements showed that the presence of inhibitor molecules decreases cathodic and anodic currents and shifts corrosion potential to a more positive potential region. Adsorption of the inhibitor molecules to the mild steel surface obeyed the Langmuir adsorption isotherm. Adsorption free energy was calculated from the adsorption isotherms as -31.33 to-39.0kJmol−1. The negative value of ΔGads showed that the adsorption process is spontaneous for the studied conditions. In addition, measurements were carried out at different solution temperatures to determine temperature dependence of the adsorption process. At all studied temperatures, the inhibitor molecule protected mild steel with the same effect.

Study on the inhibition of Mild steel corrosion by N, N- dimethylN-(2-phenoxyethyl) dodecan-1-aminiumbromide in HCl Medium