Corrosion behavior of Mild Steel in Sodium Chloride solution by Copper Complex of (8-hydroxy quinoline) Derivative

Abstract

The Corrosion behavior of a inhibitor namely Cu complex of 8-hydroxy quinoline derivative  (Cu-HUF) in controlling corrosion of mild steel immersed in aqueous solution containing 60 ppm Cl^-  has been investigated using weight loss method and electrochemical impedance spectroscopy. In presence of inhibitor the corrosion inhibition efficiency offered by 50 ppm of Cu-HUF is 80 %. The corrosion inhibition was observed due to the formation of more stable and compact protective film on the mild steel surface at minimum concentration. The surface film formed over the mild steel surface was confirmed by IR spectra. The surface of the samples exposed to the inhibited solution was analysed using SEM and EDAX techniques. The biocidal efficiency of the system has been evaluated against certain microorganisms such as E.Coli, Streptococcus, Pseudomonas, Entrobacter which shows good biocidal efficiency.