Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 338, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2021.116550
Keywords
DFT; Green inhibitor; Corrosion, Walnut; Agricultural waste; EIS
Funding
- National Natural Science Foundation of China [21706195, 22062022]
Ask authors/readers for more resources
The study investigated the corrosion inhibition property of Juglone extracted from walnut green husk on mild steel samples exposed to an acid electrolyte. The results showed that the efficiency of the inhibitor increased with higher concentration and reached 95% with 800 ppm of green corrosion inhibitor after 8 hours of immersion. Additionally, the extracted GCI functioned as a mixed-type corrosion inhibitor, as revealed by Tafel extrapolated polarization results.
The present paper has studied the corrosion inhibition property of Juglone extracted from walnut (Juglans regia L.) green husk for mild steel samples exposed to an acid electrolyte (1 M HCl). Besides, via computer modelings, the attraction forces of the inhibitors/metal surface were explored. The corrosion inhibition efficiency of the organic inhibitor was evaluated using potentiodynamic polarization as well as EIS techniques. In addition, XPS, FT-IR, SEM, AFM, and UVvisible spectroscopy have been used to study the inhibition mechanism of the agricultural waste extract in the corrosive media. Quantum chemical calculations based on DFT theory and molecular dynamic simulations were investigated on the adsorbed Juglone inhibitors. The obtained results indicated that the efficiency of the used inhibitor was enhanced with increasing the concentration of green corrosion inhibitor (GCI) and reached 95% in the presence of 800 ppm after 8 h immersion. Moreover, the average roughness of the exposed metal to the corrosive electrolyte decreased from 68.2 +/- 8.3 nm for the blank solution to 3.4 +/- 0.3 nm for the solution containing 800 ppm GCI. Furthermore, the Tafel extrapolated polarization results revealed that the extracted GCI functioned as a mixed-type corrosion inhibitor. Finally, the obtained analysis results are supported by theoretical data. (C) 2021 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available