Abstract
The inhibitive action of Gibberellic acid on the corrosion of carbon steel in 1 M HCl solution was investigated by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulations (EFM) techniques. Potentiodynamic polarization studies clearly reveal that Gibberellic acid acts essentially as mixed inhibitor. The inhibition efficiency was found to increase with inhibitor concentration. The adsorption of Gibberellic acid on carbon steel surface is found to obey Langmuir adsorption isotherm. The morphology of inhibited carbon steel was analyzed by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDX). The mechanism of inhibition process was discussed in terms of the adsorption of Gibberellic acid on the metal surface.
| Original language | English |
|---|---|
| Pages (from-to) | 767-778 |
| Number of pages | 12 |
| Journal | Journal of Materials and Environmental Science |
| Volume | 5 |
| Issue number | 3 |
| State | Published - 2014 |
| Externally published | Yes |
Keywords
- Carbon steel
- Corrosion inhibition
- EDX
- EFM
- EIS
- HCl
- SEM
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