Vol. 3, Issue 1 (2018)
Study of corrosion inhibition properties of Tetradecylamine for mild steel in 1.0 M HCl solution
Author(s): Vikas, Pradeep Kumar, Anju Malik, Suresh Kumar, Anjoo Bala, Hariom
Abstract: The corrosion inhibition behavior of Tetradecylamine on mild steel in 1.0 M HCl solution was investigated at different concentration and temperature i.e. 298, 308 and 318K for immersion time periods of 24.0 hrs by Weight loss measurement, Electrochemical impedance spectroscopy (EIS), Potentiodynamic polarization measurement, adsorption isotherm and SEM (Scanning Electron Microscope). The results shows that the Tetradecylamine act as excellent inhibitor and inhibition efficiency increases and corrosion rate decreases with concentration but reverse occur with increasing the temperature. The maximum inhibition efficiency was found 93.10% for 1000 ppm concentration at 298 K temperature for 24.0 hours. Data obtained from electrochemical impedance spectroscopy shows that charge-transfer resistance (Rct) increases and the capacitance of double layer (Cdl) decreases with the inhibitor concentration, confirming the adsorption process mechanism. Polarization curve shows that the Tetradecylamine behave as mixed type inhibitor in 1.0 M HCl solution with different concentration. The adsorption of inhibitor obeyed the Langmuir adsorption isotherm. The formation of protective layer on the mild steel surface was confirmed by the SEM techniques.