Synthesis a novel family of phosphonate surfactants and their evaluation as corrosion inhibitors in formation water

• Published in: Journal of molecular liquids Vol. 281; pp. 528 - 541
• Main Authors: Migahed, M.A., Alsabagh, A.M., Abdou, M.I., Abdel-Rahman, Adel A.-H., Aboulrous, Amany A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2019
• Subjects: Carbon steel; Corrosion; Formation water; Phosphonates; Quantum calculation; Carbon steel; Formation water; Corrosion; Quantum calculation; Phosphonates
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2019.02.093

Nine phosphonates surfactant were synthesized by two steps. The first step was condensation between acetaldehyde and butyl amine, dodecylamine or hexadecylamine individually to give three corresponding Schiff bases, and then the Schiff base products were added to dibutyl phosphite individually. The second step was reaction of the phosphonate products with polyethylene glycol 400, 600 and 1000 to get on the nine water soluble phosphonate corrosion inhibitors. The products were characterized by FTIR, 1HNMR and 13CNMR spectroscopic techniques. The surface active properties of this phosphonate were calculated and they were evaluated as corrosion inhibitors in formation water formulations using open circuit potential and potentiodynamic polarization. The quantum calculations of the structures were calculated and the data obtained were nearly closed with the experimental data. HMPA1 shows the best results as corrosion inhibitors (efficiency 94%) at lowest concentration 15 ppm. The corrosion inhibition mechanism was discussed on the basis of surface tension measurements and the electronic data. [Display omitted] •Nine novel phosphonates were synthesized and characterized by spectroscopic methods.•Electrochemical techniques were used to evaluate as corrosion inhibitors.•Quantum was applied to the synthesized phosphonate to predict their efficiencies.•The percentage inhibition efficiency (IE%) of the surfactants increases by decrease the alkyl chain and the ethylene units.