Adsorption and performance assessment of some imine derivatives as mild steel corrosion inhibitors in 1.0 M HCl solution by chemical, electrochemical and computational methods

This study provided a thermodynamic study of the adsorption process and the corrosion inhibition performance of three cationic surfactant based on imine surfactant corrosion inhibitor in 1.0 M HCl solution. The results showed that the tested imine surfactants inhibitors are promising because of thei...

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Bibliographic Details
Published in:Materials chemistry and physics 2018-11, Vol.219, p.444-460
Main Authors: Badr, Emad A., Bedair, M.A., Shaban, Samy M.
Format: Article
Language:English
Subjects:
Adsorption
Charge transfer
Computer simulation
Corrosion
Corrosion inhibitors
DFT
Electrochemical impedance spectroscopy
Imine cationic surfactants
Low carbon steels
Low concentrations
Molecular dynamics
Organic chemistry
Performance assessment
SEM
Steel
Surfactants
Tafel polarization
Thermodynamics
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Summary:This study provided a thermodynamic study of the adsorption process and the corrosion inhibition performance of three cationic surfactant based on imine surfactant corrosion inhibitor in 1.0 M HCl solution. The results showed that the tested imine surfactants inhibitors are promising because of their high inhibition efficiency at low concentrations and high temperatures. According to the obtained results, the adsorption behavior of the surfactant imine inhibitors onto the mild steel surface follow Langmuir model isotherm. The potentiodyanamic polarization parameters showed that the surfactant imine inhibitors act as mixed type inhibitors. A reduction in the double layer capacitance and an increase in the charge transfer resistance are occurring as a result for the imine inhibitor adsorption. DFT, DMol3 and molecular dynamic simulations were also used for investigation of inhibitive and adsorption properties for the studied compounds. [Display omitted] •Three surfactants were synthesized and characterized by FTIR and 1HNMR.•The adsorption of these compounds is chemical adsorption and obeys Langmuir adsorption isotherm.•Calculated quantum chemical parameters showed a good correlation with inhibition efficiencies.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2018.08.041