Experimental and quantum chemical studies of the effect of poly ethylene glycol as corrosion inhibitors of aluminum surface

The corrosion inhibition of poly ethylene glycol (PEG) toward the aluminum surface in 1.0 M HCl has been studied by weight loss and polarization techniques. The results showed that the PEG acts as a good inhibitor and the inhibition efficiency is due to the anodic and cathodic inhibition (mixed type). The thermodynamic functions. were calculated to find a good correlation with the inhibition efficiency. Quantum chemical parameters were calculated using ab initio and OFF methods to find a good correlation with the inhibition efficiency. A good correlation was found between the theoretical calculations and experimental observations. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.