Abstract
Three novel Schiff base compounds were synthesized and characterized using spectroscopic methods (FT-IR, 1H NMR and 13C NMR). Their critical micelle concentrations were determined by conductimetric and surface tension measurements. The inhibition potentials of the prepared surfactants on mild steel corrosion in H2SO4 have been investigated using electrochemical and scanning electron microscopy techniques. The results showed that all surfactants are good inhibitors for mild steel corrosion with the percentage inhibition efficiency of up to 99.21% at 1.0mM. The data showed that the studied surfactants are mixed-type inhibitors. Adsorption of the inhibitors obeyed the Langmuir isotherm. The results obtained from theoretical calculations support our experimental studies.
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•Three novel Schiff Base surfactants have been successfully synthesized.•All synthesized surfactants inhibit mild steel corrosion in 1.0M H2SO4.•The adsorption model obeys to the Langmuir isotherm.•Potentiodynamic polarization studies showed that the studied surfactants are mixed-type inhibitors.•The results obtained from theoretical calculations support our experimental studies.