Izvorni znanstveni članak
https://doi.org/10.5599/jese.2546
Original hydrazine carbothioamide Schiff base derivative as a suitable mitigator for corrosion of carbon steel and hydrogen production in acidic aqueous media
Mahmoud G. A. Saleh
; Chemistry Department, College of Science, Northern Border University, Arar, Saudi Arabia
*
Majda Alfaker
; Chemistry Department, Faculty of Science, Prince Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
*
Rasha N. Felaly
; Chemistry Department, Faculty of Science, Umm Al-Qura University, Makkah, Saudi Arabia
Salih S. Al-Juaid
; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
Fatima H. Alabdali
; Al Qunfudhah University College, Umm Al-Qura University, Saudi Arabia
Kamal A. Soliman
; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Metwally Abdallah
; Chemistry Department, Faculty of Science, Benha University, Benha, Egypt
Saleh Abd El Wanees
; Chemistry Department Faculty of Science Zagazig University, Egypt
*
* Dopisni autor.
Sažetak
The inhibitive effect of E-2-(1-methylpyrrolidin-2-ylidene) hydrazine carbo-thioamide Schiff base (MPHCA) towards the corrosion of carbon steel in hydrochloric acid media was examined using various chemical and electrochemical techniques. The rate of metal destruction in the HCl solution is reduced in the presence of the MPHCA. The inhibition efficiency is increased with more additions of MPHCA to reach 97.68 % at 5.0 mM concentration, at 25 °C. The inhibition process is controlled by the adsorption of inhibitive molecules on the carbon steel surface, obeying the Langmuir model. The computed ΔGoads values with the negative sign confirm the spontaneous nature of the adsorption process. Such values varied between -34.45 and -36.77 kJ mol-1, supporting the mixed chemo and physisorption mechanisms. The lowering in Kads values with the increase in temperature could confirm the escape of a few adsorbed MPHCA molecules from the metallic surface into the examined solution. The theoretical studies by the DFT method and conductor-like polarizable continuum determined the inhibitor's optimized geometries, providing insights into their molecular structure and potential properties. Monte Carlo and molecular dynamics simulations assessed the inhibitors' adsorption energy and comprehensive adsorption characteristics. MPHCA showed the highest adsorption energy, suggesting superior corrosion inhibition characteristics.
Ključne riječi
Iron-carbon alloy; corrosion inhibition; imine compound; mass loss; potentiodynamic polarization; hydrogen evolution; quantum computation
Hrčak ID:
335107
URI
Datum izdavanja:
9.7.2025.
Posjeta: 134 *