It was studied how the components of plant extracts affect corrosion inhibition both electrochemically and gravimetrically. There are growing concerns about the toxicity of conventional organic inhibitors; This has resulted in the study of plant-based, environmental alternatives for corrosion inhibition. This study has examined the electrochemical and gravimetric properties of the components of Carica papaya leaf extracts on the corrosion of mild steel, zinc, and aluminium using acidic HCl and H2SO4 as the media. The effectiveness of the inhibition was measured with the electrochemical impedance spectroscopy and gravimetric methods (response surface optimisation). The maximum efficiency of the extracts was between 75.42 and 84.56. EIS Nyquist diagrams demonstrated semicircles increasing with extract concentration which suggests an increase in Rct and decrease in capacitance that would be suitable to develop compact films whereas the gravimetric data represented that weight loss decreases in a dose-dependent fashion.Adsorption was Langmuir, Temkin, Frumkin, and Flory-Hoggins isotherms (R2 = 0.937-0.997) with relatively low Kads and delta Gads indicative of physisorptive electrostatic bonding. The study effectively verified that Carica papaya leaf is a viable, synergistic green inhibitor that is a suitable alternative for corrosion control.