THE USE OF BANANA STEM EXTRACT AS GREEN INHIBITOR TO MITIGATE CORROSION IN ACIDIC ENVIRONMENT: OPTIMIZATION APPROACH

Abstract: Organic corrosion inhibitors, which are commonly used in the petroleum, refinery, pipeline, and automobile applications, are toxic and have negative environmental consequences. A cost-effective green inhibitor is undoubtedly a better option. The aim of this study is to use banana stem extract as a viable green inhibitor to mitigate corrosion in marine environment using an optimization approach. The extract was phytochemically analyzed to find out if it contained any bioactive constituents capable of preventing metal corrosion. Box-Behnken design was used to investigate the effects of process variables: temperature (30°-60°C), immersion time (3-9 days), extract amount (0.2-0.8 g/l). Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS) were employed for characterization. The extract was found to be a good inhibitor because it contains alkaloids, phenols, tannins, saponins, terpenoids, steroids and flavonoids, according to the results of the phytochemical analysis. The experimental design's optimal process levels were found to be 45°C, 6 days of immersion, and 0.5 g/l of inhibitor. It was observed that more white patches were present on the SEM and EDS results of the mild steel from validated experiment via adsorption. It confirmed that banana stem extract is a good inhibitor in 0.1M H2SO4 solution.