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Synthesis and Evaluation of 4‐Diethyl Amino Benzaldehyde Schiff Base Cationic Amphiphiles as Corrosion Inhibitors for Carbon Steel in Different Acidic Media
Author(s) -
Negm Nabel A.,
Zaki Mohamad F.,
Salem Mounir A. I.
Publication year - 2009
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-009-1156-0
Subject(s) - chemistry , cationic polymerization , benzaldehyde , schiff base , corrosion , surface tension , carbon steel , aqueous solution , pulmonary surfactant , amine gas treating , inorganic chemistry , amphiphile , fourier transform infrared spectroscopy , nuclear chemistry , elemental analysis , organic chemistry , polymer chemistry , chemical engineering , catalysis , polymer , biochemistry , physics , quantum mechanics , engineering , copolymer
A novel series of cationic surfactants containing Schiff base groups were synthesized by condensation of fatty amines namely: dodecyl, tetradecyl, hexadecyl and octadecyl amine and 4‐diethyl aminobenzaldehyde. The chemical structures of these surfactants were confirmed using elemental analysis, FTIR spectra, 1 H‐NMR and atomic absorption spectroscopy. Surface properties of the synthesized compounds were determined using surface tension techniques. The results of the surface tension measurements showed good surface behaviors of these compounds in their aqueous solutions. The surface activities were found to be greatly influenced by the chemical structures of the synthesized compounds. The synthesized cationic Schiff bases were evaluated as corrosion inhibitors for carbon steel in different acidic media (HCl and H 2 SO 4 ) at different doses (400, 200, 100, 50, 25 ppm). The corrosion inhibition efficiencies of these inhibitors were calculated using the corrosion rates of the carbon steel in the studied media and found in the acceptable range of the commercially used inhibitors. Also the chemical structure of these inhibitors was found of great influence on their inhibiting efficiency.