화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.21, 1029-1038, January, 2015
DOI10.1016/j.jiec.2014.05.012  Export Citation
Evaluation of some cationic surfactants based on dimethylaminopropylamine as corrosion inhibitors
Samy M. Shaban†, Ismail Aiad, Mohamed M. El-Sukkary, E.A. Soliman1, and Moshira Y. El-Awady
  • Petrochemical Department, Egyptian Petroleum Research Institute, Cairo, Egypt
  • 1Faculty of Science, Ain Shams University, Cairo, Egypt
E-mail:
Three cationic surfactants based on Schiff base were evaluated as corrosion inhibitors for carbon steel in acidic medium. Three techniques were used for the evaluation as corrosion inhibitors, namely; weight loss, polarization and electrochemical impedance. The results showed that all synthesized inhibitors are good inhibitors and their inhibition efficiencies were significantly increased by increasing both the concentration and temperatures. Polarization curves revealed that the studied inhibitors represent a mixed-type inhibitors. Changes in impedance parameters such as charge transfer resistance, Rct, and double-layer capacitance, Cdl were indicative for adsorption of inhibitors on themetal surface, leading to the formation of a protective film. The potentiodynamic polarization measurements indicated that the inhibitors are a mixed type. The adsorption of these inhibitors was found to obey Villamil adsorption model.
Keywords:Weight loss;Potentiodynamic polarization;Impedance;Acid solution;Adsorption isotherm
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