Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry


Synergistic Inhibition of Corrosion of Mild Steel in Sulphuric acid by New Ternary System

Author(s): Geetha M. B and S. Rajendran

Corrosion inhibition of mild steel using a new ternary formulation, Urea, Zn (II) and L-Alanine in sulphuric acid medium at pH-4 was studied by weight loss and electrochemical studies. The inhibition efficiency increases with increasing concentration of inhibitors. The electrochemical impedance spectroscopy results showed that the change in the impedance parameters, Charge transfer resistance and double layer capacitance, is due to the adsorption of inhibitor molecules leading to the formation of a protective layer on the surface of the mild steel. The obtained results were confirmed by surface examination using Ultraviolet spectroscopy and Atomic Force Microscopy.