Corrosion inhibition of aluminum in 2M HCL using chromolaena odorata leaf extract

Metal corrosion in acidic conditions, especially aluminum, poses major challenges to the industry and leads to great fiscal loss and safety ‎problems. The development of green corrosion inhibitors has sparked growing interest due to their low toxicity and ‎biodegradability in pursuit of sustainable results. In this research article, we analyze Chromolaena odorata leaf extract as a corrosion ‎inhibitor on aluminum in 2.0 M hydrochloric acid using the weight loss method. The extract shows good inhibitory performance, and ‎inhibition effectiveness increased with concentration. The extract reached a maximum efficiency of 99% at 5% v/v concentration. Adsorption of phytochemicals such as flavonoids and alkaloids onto the aluminum surface, which likely reduces corrosion. The adsorption ‎behavior conformed to the Langmuir isotherm, indicating monolayer adsorption on the metal surface. These findings suggest that ‎Chromolaena odorata can serve as a green alternative to conventional synthetic corrosion inhibitors‎.