Corrosion of stainless steel surfaces poses significant challenges for desalination units using hydrochloric acid for cleaning. A recent study has explored the use of lavender angustifolia extract (LAE) as an eco-friendly corrosion inhibitor, demonstrating remarkable protection for 316 stainless steel surfaces.
The research, conducted by M. A. Deyab and Q. Mohsen at Taif University, focuses on preventing corrosion during acid cleaning operations, where common practices often expose stainless steel to highly corrosive environments. LAE has shown potential not only to combat this corrosion but to do so sustainably.
Using high-performance liquid chromatography (HPLC), the study identified key compounds within the LAE responsible for its protective qualities. These included linalyl acetate, linalool, and others, which contribute to its effectiveness as a corrosion inhibitor. Notably, tests demonstrated up to 94.3% reduction in corrosion rates when LAE was included at optimal concentrations, showcasing the extract's remarkable efficiency.
Throughout the experiments, various techniques measured the inhibitory qualities of LAE. Weight loss tests quantified corrosion rates under controlled conditions, confirming the extract's ability to form a protective layer over the stainless steel surface. Electrochemical techniques, including Tafel polarization studies, illustrated the lower corrosion current density achieved with LAE, indicating reduced corrosion activity on the stainless steel.
The findings suggest the adsorption of LAE onto the metal surface, forming barriers against environmental corrosive agents. This mechanism of action indicates LAE not only serves as a natural alternative to synthetic corrosion inhibitors but also prioritizes environmental health and safety.
Concluding their study, the authors highlighted the promise of using plant-based extracts like LAE within the desalination industry. This approach not only addresses immediate corrosion challenges but points toward more sustainable operational practices, making significant strides toward greener tech.
The potential for practical applications of LAE as a corrosion inhibitor is noteworthy, offering both effectiveness and environmental friendliness, setting the stage for future research and implementation.