Abstract
Corrosion and corrosion inhibition of zinc electrode were investigated in neutral chloride solution using electrochemical techniques. Increasing chloride concentration leads to an increase in the corrosion rate of the electrode. The corrosion inhibition characteristics of Tricine (N-(Tri(hydroxymethyl)methyl)glycine) have been studied as an eco-friendly green inhibitor for corrosion control of zinc electrode in 0.5M NaCl corrosive solution using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Tricine provided an inhibition efficiency of 86.7% at 3mM which increased to about 90% with 10mM. The corrosion inhibition mechanism of the protective layers is also discussed. The adsorption of Tricine on metal surface obeyed Langmuir’s adsorption isotherm. Polarization measurements showed that the Tricine acted as anodic inhibitor in NaCl solution and the inhibitor molecules followed physical adsorption on the surface of zinc.
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