Study of the inhibition effect of two novel synthesized amido-amine-based cationic surfactants on aluminum corrosion in 0.5 M HCl solution

Two novel amido-amine-based cationic surfactants, namely, 3-decanamido-N,N,Ntrimethylpropan-
1-aminium methyl sulfate (DAMS) and N-(3-decanamidopropyl)-
N,N-dimethylbutan-1-aminium bromide (DABB) were prepared and their chemical
structures were elucidated via various spectroscopic tools. The surface activities
of the targeted prepared surfactants were investigated. Utilizing potentiodynamic
polarization, hydrogen evolution, and weight loss methods, the inhibition impact
of both synthesized surfactants on aluminum corrosion in solution with 0.5 M HCl
was studied. The effect of raising both temperature and surfactant concentration
on the inhibition efficiency was studied and the thermodynamic functions were
calculated and clarified. Langmuir adsorption isotherm fitted widely with the
empirical data. At all concentrations and temperatures, it was found that the inhibition
efficiency for DAMS is greater than that of DABB.