13 research outputs found
Temperature effect on the efficiency of Eucalyptus Camaldulensis leaves in the acid corrosion of carbon steel
Synthesis, characterization and corrosion inhibition studies of novel 8-hydroxyquinoline derivatives on the acidic corrosion of mild steel: Experimental and computational studies
Adsorption and Inhibition Mechanisms of New Pyrazole Derivatives for Carbon Steel Corrosion in Hydrochloric Acid Solutions Based on Experimental, Computational, and Theoretical Calculations
The study aims to synthesize two green pyrazole compounds, N-((1H-pyrazol-1-yl)methyl)-4-nitroaniline
(L4) and ethyl 5-methyl-1-(((4-nitrophenyl)amino)methyl)-1H-pyrazole-3-carboxylate (L6), and test their action as
corrosion inhibitors for carbon steel (CS) in a 1 M HCl solution.
Both chemical and electrochemical methods, namely, gravimetric measurements
(WL), potentiodynamic polarization (PDP), and electrochemical impedance
spectroscopy (EIS), were used to assess the efficiency of the investigated
molecules. DFT calculations at B3LYP/6-31++G (d, p) and molecular
dynamics simulation were used to carry out quantum chemical calculations
in order to link their electronic characteristics with the findings
of experiments. The organic products exhibited good anticorrosion
ability, with maximum inhibition efficiencies (IE %) of 91.8 and 90.8%
for 10–3 M L6 and L4, respectively. In accordance
with PDP outcomes, L6 and L4 inhibitors act as mixed-type inhibitors.
Assessment of the temperature influence evinces that both L4 and L6
are chemisorbed on CS. The adsorption of L4 and L6 on CS appears to
follow the Langmuir isotherm. Scanning electron microscopy and UV–visible
disclose the constitution of a barrier layer, limiting the accessibility
of corrosive species to the CS surface. Theoretical studies were performed
to support the results derived from experimental techniques (WL, PDP,
and EIS)