Copper Corrosion Inhibition using BTAH Inhibitor in Sodium Chloride Medium: Experimental and Theoretical Studies

Abstract

The effect of 1H-benzotriazole (BTAH) with ppm (part per million) grade concentrations on
copper corrosion in aerated 0.5 M NaCl solution is studied using chemical method (weight
loss) and electrochemical methods (Potentiodynamic Polarization and Electrochemical
Impedance Spectroscopy (EIS)). The present study confirm that the BTAH acts as a mixedtype inhibitor of copper corrosion in 0.5 M NaCl. The optimum inhibition efficiency is at 30
ppm of BTAH. The surface characterization performed using Scanning Electron Microscopy
(SEM) to confirm the adsorption of the inhibitor molecules after 21 days of immersion time
in aerated 0.5 M NaCl. The results obtained from different techniques used in this research
are in very good agreement and revealed that the BTAH is a very good inhibitor of copper
corrosion in sodium chloride medium. Computer Simulation techniques confirm that the
BTAH molecules adsorbed on the Cu (111) Surface.