| Title: | Synthesis and evaluation of novel series of Schiff base cationic surfactants as corrosion Inhibitors for Carbon Steel in Acidic/Chloride Media: experimental and theoretical investigations |
| Authors: | H A El-Lateef ; Ahmed M. Tantawy |
| Year: | 2016 |
| Keywords: | Carbon steel; Corrosion inhibition; Cationic surfactants; EIS; Computational details; SEM/EDX |
| Journal: | RSC advances |
| Volume: | Not Available |
| Issue: | Not Available |
| Pages: | Not Available |
| Publisher: | Not Available |
| Local/International: | International |
| Paper Link: | Not Available |
| Full paper | Ahmed Tantawy_C5RA21626E.pdf |
| Supplementary materials | Not Available |
| Abstract: |
A new family of Schiff base cationic surfactants (CSSB) having various alkyl chain lengths were prepared and their chemical structure was elucidated by using different spectroscopic techniques (FTIR, 13C-NMR and 1H-NMR). The surface activity parameters of the prepared surfactants were measured to set the adsorption and micellization characteristics at water/air interface. The corrosion inhibition capability of these surfactants was investigated on a carbon steel surface in 3.5%NaCl+ 0.5 M HCl solutions at different temperatures (30-60 ºC) by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The results revealed that CSSB compounds inhibited corrosion of carbon steel in the investigated acidic chloride environment. It was found that the inhibition efficiency increments with an increase in inhibitor concentrations and decreases with increasing temperature. Polarization data indicated that the investigated compounds act as mixed-type inhibitors, and the adsorption isotherm basically obeys the Langmuir isotherm. The corrosion inhibition mechanism was discussed based on the potential of zero charge value. An SEM/EDX studies confirmed that CSSB inhibitors could form films by adsorption on carbon steel surface. The theoretical predictions exhibit good agreement with empirical results. |
