Empirical Analysis and Mitigation Response of Synthesised Musa Paradisiaca Compounds Inhibitory Extract on AA6063

This research assesses the anticorrosive activity of Musa Paradisiaca (plantain peel extract) on AA6063 aluminum alloy when immersed in a 1M HCl solution. The plantain extract was tested in concentrations of 0.2g, 0.4g, 0.6g, and 0.8g and is considered a natural green corrosion inhibitor. The corrosion studies on AA6063 were carried out by the techniques of potentiodynamic polarization, optical microscopy, SEM/EDS, and XRD analysis. Also, tests were done in the range of 30°C to investigate the inhibition efficiency. It was observed from results that the plantain extract acts as a mixed-type inhibitor and it helps in reducing the corrosion rate by depositing a protective coating on the surface of the alloy. It was found from the Tafel plots that as the concentration of extract was increased, there was a decrease in corrosion current density (j corr ) and an increase in Polarisation Resistance (Rp). The adsorption mechanism agreed with the Langmuir isotherm suggesting that only monolayer adsorption took place. Analysis of the protective film by SEM/EDS and XRD revealed the presence of Fe 2 O 3 , CaO, Mg, SiO 2 , and Zn components. Maximum inhibition efficiency of 82% was recorded at the extract concentration of 0.8g. The study highlights the potential of plantain extract to serve as a viable green inhibitor for aluminium in acidic medium.