Abstract
The inhibition effect of Curcumine Longa (CUR) on the corrosion of aluminum in presence of 1 M HCl solution was studied by weight loss, Potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), quantum chemical calculations and SEM techniques. Weight loss and electrochemical results showed that inhibition efficiency of CUR increases with increase in the concentration and attained a maximum value of 89.60% at 100 ppm concentration. Polarization study revealed that CUR acts as mixed type inhibitor whereas EIS study showed that the CUR inhibits aluminum corrosion by getting adsorbed at metal/ electrolyte interfaces which followed the Langmuir adsorption isotherm. SEM study confirmed the film forming ability of CUR on the aluminum surface. Quantum chemical calculations study was performed to provide insight into adsorption behavior of CUR on the aluminum surface. Experimental and theoretical results were in good agreement and well complimented to each other.
| Original language | English |
|---|---|
| Pages (from-to) | 245-265 |
| Number of pages | 21 |
| Journal | Analytical and Bioanalytical Electrochemistry |
| Volume | 9 |
| Issue number | 2 |
| State | Published - Mar 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 by CEE (Center of Excellence in Electrochemistry).
Keywords
- Aluminum
- Corrosion inhibitor
- Electrochemical measurements
- Quantum calculations
- Weight loss
ASJC Scopus subject areas
- Analytical Chemistry
- Electrochemistry