Inhibitive properties and quantum chemical studies of thiodiglycolic acid on aluminium corrosion in HCl solution
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Date
2015-04
Authors
Abiola, O.K.
Oloba-whenu, O.A.
Journal Title
Journal ISSN
Volume Title
Publisher
African corrosion journal
Abstract
The corrosion inhibitive effect of thiodiglycolic acid (TGDA) on aluminium immersed in 0.5 M HCl solution
was evaluated by chemical method. It was found that TGDA acts as a corrosion inhibitor, yielding a maximum
inhibition efficiency of 89.2 ±0.2%. The mechanism of its corrosion inhibition is by adsorption onto the metal’s
surface. The corresponding standard Gibbs energy of TGDA adsorption on Al was calculated to be – 37.4 kJ mol-
1. The quantum chemical parameters, highest occupied molecular orbital (HOMO), lowest unoccupied molecular
orbital (LUMO) energy levels and HOMO –LUMO energy gap of TGDA were calculated using density functional
theory (DFT).
Description
Staff publications
Keywords
Research Subject Categories::NATURAL SCIENCES::Chemistry::Physical chemistry , Aluminium , Thiodiglycolic acid , corossion , inhibitor , Density functional theory
Citation
Abiola, O.K. and Oloba-Whenu, O.A. (2015). Inhibitive properties and quantum chemical studies of thiodiglycolic acid on aluminium corrosion in HCl solution.