Corrosion inhibition performance of newly synthesized 5-alkoxymethyl-8-hydroxyquinoline derivatives for carbon steel in 1 M HCl solution: experimental, DFT and Monte Carlo simulation studies
Abstract:Three new organic compounds primarily based on 8-hydroxyquinoline have been successfully synthesized and characterized via different spectroscopic methods (FTIR, 1H, and 13C NMR). The synthesized compounds, namely 5-propoxymethyl-8-hydroxyquinoline (PMHQ), 5-methoxymethyl-8-hydroxyquinoline (MMHQ) and 5-hydroxymethyl-8-hydroxyquinoline (HMHQ), were evaluated as corrosion inhibitors for carbon steel in 1 M HCl solution using electrochemical impedance spectroscopy, potentiodynamic polarization and weight loss me… Show more
“…Therefore, the inhibitor molecules are chemisorbed on the steel surface. [81][82][83] Although, the chemisorption of inhibitor molecules occurs through p electrons of phytochemicals and physisorption occurs via opposite charges of îavonoids to interact with mild steel surface. Whereas, the polyhydroxy groups of îavonoids interact with 111 surface irons.…”
“…Therefore, the inhibitor molecules are chemisorbed on the steel surface. [81][82][83] Although, the chemisorption of inhibitor molecules occurs through p electrons of phytochemicals and physisorption occurs via opposite charges of îavonoids to interact with mild steel surface. Whereas, the polyhydroxy groups of îavonoids interact with 111 surface irons.…”
“…The parameter, 4 Fe(110) has been reported to have a value of 4.82 eV (ref. 28) and has been successfully used in literature 27,29 while was taken to be 0 eV mol Ă1 . 30 The work function, 4 is a better descriptor of charge density of metal than electronegativity.…”
Section: Quantum Chemical Calculations Detailsmentioning
Three novel acridine-based thiosemicarbazones were investigated for their corrosion inhibition potentials on mild steel in 1 M HCl using combined electrochemical, DFT and Monte Carlo simulation techniques.
“…61 The calculated DG ads values for AEM1 and AEM2 are varied between Ă42.03 and Ă44.20 kJ mol Ă1 which indicates that both investigated inhibitors adsorb on metallic surface mostly via chemisorption mechanism. [63][64][65]…”
Herein, the synthesis, characterization and corrosion inhibition effectiveness of two aromatic epoxy monomers (AEMs) in carbon steel corrosive dissolution in 1 M HCl solution was investigated using computational and experimental techniques.
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