Abstract
The corrosion inhibition efficiency of 2-amino-4-(2,4-dihydroxyphenyl) quinoline-3-carbonitrile (ADQC) on SAE 1006 steel has been investigated using electrochemical (EIS and Polarization), surface (SEM, EDX and AFM) and quantum chemical calculation methods. Results showed that inhibition efficiency increases with increasing ADQC concentration and maximum value of 96.12% was obtained at 25 mg/L concentration. EIS results showed the ADQC inhibits SAE 1006 steel corrosion becoming the adsorbate at metal/electrolyte interfaces. Polarization study showed that ADQC acts as cathodic type inhibitor. SEM, EDX and AFM finding supported the adsorption of ADQC on the mild steel surface. The quantum chemical calculations provide good insight about the adsorption and inhibition mechanism of ADQC. The experimental and quantum chemical calculation results were in good agreement.
| Original language | English |
|---|---|
| Pages (from-to) | 29-36 |
| Number of pages | 8 |
| Journal | Journal of the Association of Arab Universities for Basic and Applied Sciences |
| Volume | 23 |
| DOIs | |
| State | Published - Jun 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 University of Bahrain
Keywords
- Acid solution
- Corrosion
- Mixed type
- Quantum chemical calculations
- SAE 1006 steel
- SEM–EDX/AFM
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