Novel cationic gemini surfactant as a corrosion inhibitor for carbon steel tubes during the pickling process: synthesis, surface properties and adsorption behavior | ||
Egyptian Journal of Chemistry | ||
Article 9, Volume 63, Issue 10, October 2020, Pages 3685-3701 PDF (2.03 M) | ||
Document Type: Original Article | ||
DOI: 10.21608/ejchem.2020.23774.2413 | ||
Authors | ||
Aziza El-Tabei1; Mohamed Hegazy* 1; Ahmed Bedair2; Mahmoud Sadeq2 | ||
1Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt | ||
2Faculty of Science, Azhar Univ., Chemistry Dept., Nasr City, Cairo, Egypt | ||
Abstract | ||
Synthesis, surface parameters and corrosion inhibition efficiency (η) of novel cationic gemini surfactant (NCGSN) (namely: N-(3-(2-((5-(2-(4-(dodecyldimethylammonio)butoxy)-2-oxoethoxy)naphthalen-1-yl)oxy)acetoxy)propyl)-N,N-dimethyldodecan-1-aminium bromide) were studied and discussed. The η of carbon steel (CS) was determined by weight loss (WL), electrochemical impedance spectroscopy (EIS) & potentiodynamic polarization (PP) in the absence and presence of NCGSN. The η and charge transfer resistance (Rct) increases with increasing the NCGSN concentration and decreases with increasing the temperature. Kinetic and adsorption thermodynamic values showed that the η occurs through adsorption of NCGSN molecules on CS surface according to Langmuir isotherm. The PP results proposed the NCGSN regards a mixed-type inhibitor. Chemical and electrochemical results confirmed by SEM and EDX results which recommended the NCGSN adsorption occurs due to the barrier film formed on CS surface. | ||
Keywords | ||
carbon steel; Surfactant; Acid inhibition; weight loss; EIS; Tafel; EDX | ||
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