Abstract
The effect of 8,9-bis(4 (dimethylamino)phenyl)benzo[4,5]imidazo[1,2-a]pyridine-6,7-dicarbonitrile (INH) on mild steel corrosion in 1 M HCl was studied by electrochemical, surface and quantum chemical calculation methods. Results showed that percentage of inhibition efficiency increases on increasing INH concentration. The maximum inhibition efficiency of 96.32% was obtained at 25 mg L−1 concentration. Tafel polarization measurements show that the presence of INH in acid solution affects both cathodic and anodic reactions but acts as predominantly cathodic type inhibitor. The Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and atomic force microscopy (AFM) studies suggest the formation of adherent layer of INH on mild steel surface. The results of theoretical calculations were found to be consistent with the surface and electrochemical results.
| Original language | English |
|---|---|
| Pages (from-to) | 55-61 |
| Number of pages | 7 |
| Journal | Journal of the Association of Arab Universities for Basic and Applied Sciences |
| Volume | 22 |
| DOIs | |
| State | Published - 1 Feb 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 The Authors
Keywords
- AFM/SEM/EDX
- Acid solution
- EIS
- Mild steel
- Polarization
- Quantum chemical calculation SEM and AFM studies
ASJC Scopus subject areas
- General Chemistry
- General Mathematics
- General Materials Science
- General Biochemistry, Genetics and Molecular Biology
- General Environmental Science
- General Agricultural and Biological Sciences
- General Energy