Microwave-assisted aqueous extract of lady's mantle roots: A green-sustainable inhibitor of mild steel corrosion in HCl acid
Year: 2025
Type: article
Abstract: Currently, efforts are ongoing to address the mild steel surface corrosion issue. Recent articles demonstrated that a corrosion inhibitor with eco-friendly environmental features and robust contact with the mild steel surface is needed. In this study, an aqueous extract of Lady’s Mantle Roots (LMRAE) was prepared using the microwave-assisted extraction method and tested as a corrosion inhibitor of mild steel in a 1 M HCl solution. Numerous methods were used to investigate the impacts of LMRAE as a corrosion inhibitor under different conditions, including weight loss (WL), electrochemical measurements, microstructure analysis, FT-IR, and Monte Carlo (MC) simulation. The results revealed that with increasing concentrations and temperatures, LMRAE becomes more efficient at inhibiting. At the investigated temperatures, LMRAE acted as a mixed-type inhibitor, blocking both cathodic and anodic processes. Langmuir and Temkin adsorption isotherms fit well the adsorption data obtained at 30oC and 50oC. Numerous thermodynamic parameters related to the adsorption process were computed and discussed. Thermodynamic data revealed the key role of chemisorption in the corrosion inhibition process. FT-IR and microstructural studies confirmed the formation of LMRAE-adsorbed film on mild steel surface. The observed inhibitory behaviors were supported by the MC simulation, which showed that the LMRAE constituents might interact favorably with the metal surface and create a protective layer. The results of this study further validated the noteworthy benefit of employing corrosion inhibitors derived from plants for preserving metals and alloys in aggressive solutions.
Source: Results in Chemistry
Author: Aisha H. Al-Moubaraki
Institution: University of Jeddah
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,870
OpenAlex ID: W4410230621