Inhibition of carbon steel corrosion in aqueous solutions using some fatty amido- cationic surfactant

Document Type : Original Article

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Department of Chemistry, Faculty of Science, Benha University, Benha, Egypt

Abstract

Novel cationic surfactants were synthesized and evaluated as corrosion inhibitors
for carbon steel in 1M HCl solution. The inhibition action of this surfactant was
studied by weight loss and galvanostatic polarization methods. The structure of the
prepared compounds was established by spectral tools (FT-IR and 1H-NMR). Also,
CMC and anti-microbial activity were evaluated. The adsorption of the inhibitors
was described by Langmuir adsorption isothermal. The inhibition efficiency
increases by increasing surfactant concentration and decreasing temperature. Where,
the prepared compound S at concentration 5 x 10-4mol/l at 20 recorded 94.45
%.The effect of temperature on the inhibition efficiency of corrosion process was
studied. Also, thermodynamic parameters were calculated to predict the reliable
mechanism of inhibition

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