Authors
Ghalia A Gaber, Shimaa Hosny, Fakiha El-Taib Heakal
Published in
Scientific reports. Volume 15. Issue 1. Pages 36486. Oct 20, 2025. Epub Oct 20, 2025.
Abstract
Using inhibitors is a typical way to mitigate metal degradation by forming barriers or altering reactions. Herein, the nanocomplex of copper(II) ion with 1-((E)-(2-mercaptophenylimino) methyl) naphthalen-2-ol (H2L) Schiff base ligand was successfully synthesized via an environmentally friendly approach using Coriandrum Sativum (CS) extract in ethanol. According to transmission electron microscopy (TEM), the average particle size of the produced nanocomplex was 12.71 nm. Using various electrochemical and physical techniques, namely, open-circuit potential (OCP), impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and SEM/EDX methods, the inhibitory effect of green Cu nanocomplex (Cu2L2) on the corrosion of 316 L stainless steel in a harsh mixed acid solution (1 M HCl + 1 M HNO3) was scrutinized. The findings revealed that the Cu nanocomplex exhibited mixed-type inhibition behavior, with a maximum efficiency of 85.56% achieved at 600 ppm addition. EIS results indicated an increase in the charge transfer resistance and a decrease in the double-layer capacitance by increasing Cu2L2 concentration in the ambient aggressive acidic solution. Isotherm fitting analysis suggested that Cu nanocomplex adsorption on the stainless steel surface followed the Langmuir isotherm model. Density functional theory (DFT) calculations further supported the experimentally obtained findings. The molecular dynamics (MD) simulations also endorsed that the Cu2L2 inhibitor lay flat on the metal surface, indicating better surface coverage.
PMID:
41115994
Bibliographic data and abstract were imported from PubMed on 21 Oct 2025.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 70
- Comments 0