Schiff base N,N′-bis(2-hydroxyethoxyacetophenone)-2,2-dimethyl-1,2-propanediimine
(H2(hppnptn)) as corrosion inhibitor for API 5L grade B
low carbon steel in hydrochloric acid solutions has been studied using
electrochemical techniques and surface techniques. Results showed
that the inhibition occurs through adsorption of the inhibitor molecules
on the metal surface. Thermodynamic parameters for adsorption and
activation processes were determined. Polarization data indicated
that this compound acts as mixed-type inhibitors, and the adsorption
isotherm basically obeys the Langmuir adsorption isotherm. The calculations
of reactivity indices of H2(hppnptn) such as the localization
of frontier molecular orbitals, E
HOMO
, E
LUMO
, energy
gap (Δ
E
), dipole moment (D), hardness (η), softness (σ), the fractions of electrons transferred (ΔN), electrophilicity index (ω), total
energy change (Δ
E
T
), and natural bond orbital (NBO) charge distributions
together with local reactivity by means of Fukui indices were used
to explain the electron transfer mechanism between the H2(hppnptn) molecules and the steel surface.
N,N 0 -Bis(phloroacetophenone)-1,2-propanediamine as corrosion inhibitor for steel in hydrochloric acid has been studied using electrochemical techniques and surface techniques. Results showed that the inhibition occurs through adsorption of the inhibitor molecules on the metal surface. The inhibition efficiency was found to increase with increasing inhibitor concentration and decreased with increasing temperature. Thermodynamic parameters for adsorption and activation processes were determined. Polarization data indicated that this compound acts as the mixed-type inhibitor and the adsorption basically obeys the Langmuir adsorption isotherm. The quantum chemical calculations were performed at the density functional theory level using B3LYP functional with the 6-31G (d,p).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.