Abstract
Adsorption and corrosion inhibition of Azadirachta indica gum with Zn2+/ Ni2+ cations on mild steel in 1 mol L-1 HCl
T. Brindha and J. Mallika*
DOI : http://dx.doi.org/10.13005/ojc/310216
Abstract:
This work deals with synergistic corrosion inhibition efficiency of Azadirachta indica gum and metal cations (Zn2+ and Ni2+) on mild steel in 1 mol L-1 HCl 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.
Keywords:mild steel; metal cations; corrosion inhibition; electrochemical techniques
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