A Comparative the Inhibition Performance of a Newly Synthesized Cationic Surfmer and It’s Oligomer Surfactant for Carbon Steel Corrosion in 1M Acid Chloride Solution

摘要

A N-(2-(acryloyloxy)-ethyl)-N,N-bis(2-hydroxyethyl)dodecan aminium bromide (cationic surfmer)obtained by the quaternization reaction of obtained product from the esterification reaction of acrylicacid with triethanolamine. The synthesized cationic surfmer was polymerized in the presence of waterand potassium persulfate (KPS) as initiator to give oligomer. The synthetic structure of recently1 surfactants was attested by basic examination, elemental analysis, FTIR, HNMR and gel permeationchromatography (GPC). The critical micelle concentration (CMC) values for cationic surfmer and itsoligomer measured via surface tension and conductivity measurements respectively. Electrochemicalimpedance spectroscopy and potentiodynamic polarization measurements used to determine theinhibition performance of cationic surfmer and oligomer for carbon steel in 1M HCl. The oligomerexhibited inhibition performance more than the corresponding cationic surfmer. The potentiodynamicpolarization studies clarified that, the inhibitors represent a mixed-type inhibitors and the adsorption ofinhibitors on the carbon steel followed the Langmuir isotherm. Quantum chemical parameters werealso deliberate to explain the adsorption mechanism. Satisfactory connections were gotten betweeninhibition performance and the obtained quantum chemical parameters.