Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives
Migahed, M., Abdu, A., Elfeky, H., EL-Rabiei, M. (2020). Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives. EKB Journal Management System, 63(2), 703-719. doi: 10.21608/ejchem.2019.13443.1834
M. A. Migahed; Ahmed Nasser Abdu; H. Elfeky; M.M. EL-Rabiei. "Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives". EKB Journal Management System, 63, 2, 2020, 703-719. doi: 10.21608/ejchem.2019.13443.1834
Migahed, M., Abdu, A., Elfeky, H., EL-Rabiei, M. (2020). 'Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives', EKB Journal Management System, 63(2), pp. 703-719. doi: 10.21608/ejchem.2019.13443.1834
Migahed, M., Abdu, A., Elfeky, H., EL-Rabiei, M. Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives. EKB Journal Management System, 2020; 63(2): 703-719. doi: 10.21608/ejchem.2019.13443.1834

Electrochemical behavior of Cu-10Al-10Zn alloy in seawater in the presence of cationic surfactants benzotriazole derivatives

Egyptian Journal of Chemistry
Article 28, Volume 63, Issue 2, February 2020, Page 703-719  XML PDF (2.57 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2019.13443.1834
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Authors
M. A. Migahed1; Ahmed Nasser Abdu email 2; H. Elfeky3; M.M. EL-Rabiei3
1Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, Egypt
2Department of basic science, High Institute for Engineering and Modern Technology, New-Elmarg, El-Qalyubia, Egypt
3Chemistry Department, Faculty of Science, Fayoum University, Fayoum, Egypt
Abstract
The behavior of Cu-10Al-10Zn alloy in seawater was studied in absence and presence of different concentrations of different surfactants (1-hexyl-5-methyl-1H-benzo[d][1,2,3]triazole-1- ium bromide (HBT(6)), 1-dodecyl-5-methyl-1H-benzo[d][1,2,3]triazole-1- ium bromide, (DBT(12)), and 1-octadecyl-5-methyl-1H-benzo[d][1,2,3]triazole-1- ium bromide, (OBT(18)) as corrosion inhibitors. These inhibitors were synthesized and their structures, (HBT) as a representative compound, were confirmed using 1HNMR and FTIR techniques. Conventional electrochemical techniques such as polarization methods and electrochemical impedance spectroscopy (EIS) were used. The inhibition efficiency increased by increasing the concentration of the prepared cationic surfactants in the medium. The curves of potentiodynamic polarization technique showed that, the performance of all prepared compounds act as mixed type. The standard free energy (〖∆G〗_ads^°) values indicate that the three prepared cationic surfactants adsorbed via physicochemical adsorption and obeyed to Langmuir adsorption model. AFM technique observed the decrease of surface roughness due to the protective film formed on Cu-10Al-10Zn alloy surface.
Keywords
Cu-Al-Zn alloy; Seawater; Corrosion inhibition; cationic surfactants; AFM; EIS
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