Izvorni znanstveni članak
https://doi.org/10.5599/jese.2544
Evaluation of porphyrin molecules as effective corrosion inhibitors for copper alloy in sulfuric acid using both experimental and computational approaches
Metwally Abdallah
; Chemistry Department, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
Majda Alfakeer
; Chemistry Department, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
Rasha N Felaly
; Chemistry Department, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
Abdulaziz M. Almohyawi
; Chemistry Department, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
Jabir H. Al-Fahemi Al-Fahemi
; Chemistry Department, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
Salih S. Al-Juaid
; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
Doaa F. Seyam
; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Elsayed M. Mabrouk
; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Kamal A. Soliman
; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Sažetak
The inhibition efficacies of two porphyrin molecules, namely, 5,10,15,20-tetra-[m-(methoxy) phenyl] porphyrin (m-TMPP) and 5,10,15,20-tetra-[p-(methoxy)phenyl] porphyrin (p-TMPP) on the corrosion of copper alloy (C12510) in 1.0 M H2SO4 solutions were examined. Some chemical, electrochemical measurements, density functional theory and Monte Carlo simulations were utilized to study the adsorption behaviour and corrosion inhibition efficiency of m-TMPP and p-TMPP on the Cu (111) surface in acidic media. Scanning electron microscopy analysis was employed to examine the surface morphologies of the tested C12510 surfaces. The outcomes of these techniques proved that the inhibition efficiency increases with increasing concentration of TMPP molecules and with lowering tempera¬tu¬res. The inhibition efficiency is reached to 96.23 and 97.61 % in the case of m-TMPP and p-TMPP, respectively, using the potentiodynamic polarization technique. The inhibitory effect of TMPP molecules is explained based on their spontaneous physicochemical adsorption on the surface of C12510. The adsorption process is obeyed by the Langmuir isotherm model. Additionally, some thermodynamic activation parameters were determined and discussed. It was discovered that the two TMPP compounds retarded the pitting corrosion of C12510 in chloride-containing solutions by shifting the pitting potential to a more noble direction. Based on all the approaches investigated, the inhibitory efficacy of p-TMPP is higher than that of m-TMPP at every concentration tested.
Ključne riječi
Metal alloy corrosion; heterocyclic organic compounds; adsorption isotherm; pitting potential; surface morphology; quantum chemical calculations
Hrčak ID:
328970
URI
Datum izdavanja:
3.2.2025.
Posjeta: 409 *