Piper betle extract as an eco-friendly corrosion inhibitor for aluminium alloy in hydrochloric acid media

Corrosion poses a significant challenge in our daily lives across various mediums, conditions, and factors.Although there have been numerous studies and investigations on environmentally friendly corrosion inhibitors, the available data and evidence on the effectiveness of Piper betle extract as a corrosion inhibitor are still insufficient.In this study, we explored the potential of green inhibitors, specifically Piper betle extract, for inhibiting corrosion in HCl on aluminium alloy.Sequential maceration using Piper betle extract was employed, and a weight loss experiment was conducted by immersing the aluminium alloy in HCl for 24 hours at various concentrations.The corrosion products and microstructures were then characterized using Scanning Electron Microscopy (SEM).The results obtained from this study, based on weight loss measurements, indicate a significant correlation between the inhibitory action and the amount of the inhibitor.However, our study found that the Piper betle extract inhibitor did not surpass the performance of the industrial inhibitor.When the concentration varied from 0 to 2500 ppm, the inhibition efficiencies of Piper betle extract and the industrial inhibitor increased up to 47% and 90%, respectively.Fourier Transform Infrared Spectroscopy (FTIR) revealed that hydroxychavicol is the primary active compound in Piper betle extract, and the presence of aromatic hydroxyl compounds contributes significantly to the corrosion inhibition activity.

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