Experimental and Theoretical Studies of Eosin Y Dye as Corrosion Inhibitors for Carbon Steel in Perchloric Acid Solution

Tarik Attar (Laboratory of Toxicomed, University Abou Beker Belkaid Tlemcen, BP119, 13000 Tlemcen Higher School of Applied Sciences of Tlemcen, BP 165, Bel Horizon, 13000 Tlemcen)
Abbes Benchadli (Laboratory of Toxicomed, University Abou Beker Belkaid Tlemcen, BP119, 13000 Tlemcen)
Boulanouar Messaoudi (Laboratory of Applied Thermodynamics and Molecular Modeling, Department of Chemistry, University of Abou Bekr Belkaïd Tlemcen, B.P. 119, 13000 Tlemcen Higher School of Applied Sciences of Tlemcen, BP 165, Bel Horizon, 13000 Tlemcen)
Naceur Benhadria (Laboratory of Inorganic Materials Chemistry and Application, Department of Materials Engineering, University of Science and Technology of Oran (USTO M. B), BP 1505, El M’naouar, 31000 Oran Higher School of Applied Sciences of Tlemcen, BP 165, Bel Hor)
Esma Choukchou-Braham (Laboratory of Toxicomed, University Abou Beker Belkaid Tlemcen, BP119, 13000 Tlemcen)

Bulletin of Chemical Reaction Engineering & Catalysis
2020: BCREC Volume 15 Issue 2 Year 2020 (August 2020)

The adsorption behavior and the inhibition performance of Eosin Y Dye for carbon steel corrosion in 1 M perchloric acid solution have been carried using weight loss and scanning electron micrograph (SEM) techniques as well theoretical calculations based on density functional theory (DFT). The studied inhibitor concentrations were between 5´10-5 M and 5´10-3 M. Results obtained revealed that Eosin Y is an effective inhibitor and its inhibition efficiency increases with increasing concentration to attain 96.91% at 5´10-3 M at 30 °C. Thermodynamic parameters such as adsorption heat, adsorption entropy and adsorption free energy were obtained from experimental data of the temperature studies of the inhibition process at five temperatures ranging from 20 to 60 °C. It was found that the adsorption of Eosin Y could prevent steel from weight loss and the adsorption accorded with the Langmuir adsorption isotherm. The free energy of adsorption showed that the corrosion inhibition takes place by spontaneous physicochemical adsorption of inhibitor molecules on the carbon steel surface. SEM and DFT studies confirm the adsorption of Eosin Y on carbon steel surface. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).