The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

This study aims at preparing three cationic surfactants based on benzotriazole and evaluating their efficiencies as corrosion inhibitors for copper electrodes in seawater using different electrochemical techniques (potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and atomic...

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Bibliographic Details
Published in:RSC advances 2019-08, Vol.9 (46), p.2769-2782
Main Authors: Migahed, M. A, Nasser, Ahmed, Elfeky, H, EL-Rabiei, M. M
Format: Article
Language:English
Subjects:
Adsorption
Atomic beam spectroscopy
Atomic force microscopy
Benzotriazole
Cations
Chemistry
Copper
Corrosion inhibitors
Electrochemical impedance spectroscopy
Electrode polarization
Free energy
NMR
Nuclear magnetic resonance
Organic chemistry
Protective coatings
Seawater
Surface chemistry
Surface roughness
Surfactants
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Summary:This study aims at preparing three cationic surfactants based on benzotriazole and evaluating their efficiencies as corrosion inhibitors for copper electrodes in seawater using different electrochemical techniques (potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and atomic force microscopy (AFM)). FTIR and 1 H NMR spectroscopic techniques confirmed the chemical structures of the as-prepared cationic compounds. The inhibition efficiency increased with the increase the concentration of the as-prepared compounds in the solution. The curves of the potentiodynamic polarization and the plots of EIS techniques show that the performance of all investigated compounds as mixed type. The standard free energy values imply that the three as-prepared compounds show physicochemical adsorption and obey the Langmuir adsorption model. AFM technique observed the reduction in the surface roughness due to the protective film formed on the copper surface. Finally, computational calculations show a great correlation with the experimental results due to the electron-donating effect. Three cationic surfactants based on benzotriazole were prepared and their efficiencies as corrosion inhibitors for copper electrodes in seawater were evaluated using different electrochemical techniques (polarization methods, EIS techniques and atomic force microscopy).
ISSN:2046-2069
2046-2069
DOI:10.1039/c9ra04461b