Izvorni znanstveni članak
https://doi.org/10.5599/jese.1400
Experimental and theoretical study on corrosion inhibition of mild steel by meso-tetraphenyl-porphyrin derivatives in acid solution
Messaoud Meraghni
; University of El Oued, Process Engineering Department, Faculty of Technology, B.P.789, 39000, El Oued, Algeria
Touhami Lanez
; University of El Oued, Chemistry Department, VTRS Laboratory, B.P.789, 39000, El Oued
Elhafnaoui Lanez
; VTRS Laboratory, Department of Chemistry, Faculty of Sciences, University of El Oued B.P.789, 39000, El Oued, Algeria
Lazhar Bechki
; University of Ouargla, Chemistry Department, PO Box 511, 30000, Ouargla, Algeria
Ali Kennoufa
; VTRS Laboratory, Department of Chemistry, Faculty of Sciences, University of El Oued B.P.789, 39000, El Oued, Algeria
Sažetak
The inhibition effect of meso-tetraphenyl-porphyrin (TPPH2), meso-tetra4-methophenyl-porphyrin TPPH2(p-Me), and meso-tetra4-actophenyl-porphyrin (TAcPPH2) on the corrosion of XC52 mild steel in aerated 0.5 M aqueous sulfuric acid solution was studied by potentiodynamic polarization experiments and quantum chemical calculations. Results from potentiodynamic polarization showed that inhibition efficiency of three compounds increased upon increasing of the inhibitor concentration and they are acting as mixed type inhibitors, having dominant anodic reactions. Adsorption of all compounds follows the Langmuir adsorption isotherm with moderate values of free energy of adsorption. Quantum chemical calculation using DFT/B3LYP method confirmed a strong bond between meso-tetraphenyl-porphyrins and mild steel surface. The inhibition mechanism was also determined by the potential of zero charge (PZC) measurement at the metal/solution interface.
Ključne riječi
Low carbon steel; potentiodynamic polarization; quantum chemical method, potential of zero charge
Hrčak ID:
294760
URI
Datum izdavanja:
1.3.2023.
Posjeta: 290 *