Abstract
The aim of the present study was to investigate the effect of thymus extract on corrosion inhibition of aluminum 5083 alloy in a 0.1 M NaCl medium prepared using a mixture of ethylene glycol and water using potentiodynamic and electrochemical impedance spectroscopy (EIS) techniques. The potentiodynamic electrochemical technique showed an increase in corrosion inhibition efficiency starting from 49.63% at a concentration of 0.25 g/L to 92.71% at a maximum concentration of 1.25 g/L of the extract. These results were consistent with those obtained via EIS analysis. Spectral characterization of the tested plant extract using the Fourier-transform infrared spectroscopy (FTIR) technique confirmed the presence of organic compounds having different oxygen and aromatic functionalities in the extract that could help enhance the adsorption of these compounds on the aluminum surface. This study reveals possible adsorption isotherm of the thymus extract on the aluminum surface, supporting a Langmuir isotherm for the adsorption of inhibitor molecules on this surface.
| Original language | English |
|---|---|
| Pages (from-to) | 314-321 |
| Number of pages | 8 |
| Journal | Corrosion Science and Technology |
| Volume | 22 |
| Issue number | 5 |
| DOIs | |
| State | Published - 30 Oct 2023 |
Bibliographical note
Publisher Copyright:© 2023 Corrosion Science Society of Korea. All Rights Reserved.
Keywords
- Aluminum alloy
- Electrochemical impedance
- Ethylene glycol
- Inhibition efficiency
- Thymus extract
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry
- Electrochemistry