Adsorption and Corrosion inhibition of Azadirachta indica Gum with Zn~(2+)/Ni~(2+)cations on Mild Steel in 1 mol L~(-1) HCI

摘要

This work deals with synergistic corrosion inhibition efficiency of Azadirachta indica gum and metal cations (Zn~(2+) and Ni~(2+)) on mild steel in 1 mol L~(-1) HCI using gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopic methods. The effect of temperature (303 - 348± 1 K) and immersion time (1, 2, 3, 4, 6 and 24 h) on the inhibition of corrosion has also been studied. Corrosion kinetic parameters were calculated and discussed in detail. It obeys Langmuir adsorption isotherm. The interaction of inhibitors with the mild steel surface has been established by Fourier transform infrared spectroscopy.