An Electrochemical Investigation in the Anticorrosive Properties of Silver Nanoparticles for the Acidic Corrosion of Aluminium

Authors

A. Fetouh H., Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT;Follow
Abd-El-Nabey B.A., Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT;
Goher Y.M., Department of Botany, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT;
S. Karam M., Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT;

Corresponding Author

A. Fetouh H.(howida_fetouh@yahoo.com )

Abstract

The mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used for the determinations of the corrosion rates for aluminium in 1.0 mol·L^-1 hydrochloric acid (HCl) solutions both in the absence and presence of silver nanoparticles (SNPs) at 30 ℃. The protection efficiency was evaluated to be 96.4% for 0.014 g·L^-1 of the SNPs. It has been found that the capacity of the electrical double layer at the aluminium/solution interface was decreased with increasing the concentration of the SNPs, indicating that the SNPs were adsorbed at the aluminium surface. The Langmuir adsorption isotherm and the kinetic-thermodynamic model were fitted to the experimental data. The potential of zero charge (PZC) for aluminium was determined in order to clarify the type of interaction between the metal surface and the SNPs. The experimental data obtained by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) spectroscopy, together with the visual inspections at the surfaces of the aluminium electrodes after the electrochemical tests, all gave very good support to those obtained by the mass loss and electrochemical measurements.

Graphical Abstract

Keywords

aluminium, silver nanoparticles, corrosion rate, electrochemical technique

DOI Link

https://doi.org/10.13208/j.electrochem.160427

Publication Date

2018-02-28

Online Available Date

2017-01-04

Revised Date

2017-01-03

Received Date

2016-04-27

Recommended Citation

A. Fetouh H., Abd-El-Nabey B.A., Goher Y.M., S. Karam M.. An Electrochemical Investigation in the Anticorrosive Properties of Silver Nanoparticles for the Acidic Corrosion of Aluminium[J]. Journal of Electrochemistry, 2018 , 24(1): 89-100.
DOI: 10.13208/j.electrochem.160427
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss1/10