THE EFFECTIVENESS OF WASTE MATERIAL FROM THE KITCHEN AS A CORROSION INHIBITOR FOR AISI 1020 CARBON STEEL IN AN ACIDIC ENVIRONMENT
DOI:
https://doi.org/10.54554/jmet.2026.18.01.003Keywords:
Corrosion Inhibitor, Carbon Steel, Waste, FTIRAbstract
Corrosion inhibitors are widely used to reduce the degradation of metals exposed to aggressive environments. However, many conventional inhibitors present several disadvantages, including high cost, toxicity, and potential environmental hazards. Due to increasing environmental awareness and stricter regulations, significant attention has been directed toward the development of environmentally friendly and biodegradable corrosion inhibitors. Eggshell (ES) waste, which is mainly contain of calcium carbonate (CaCO₃), has recently emerged as a promising green material for corrosion protection applications. In this study, the corrosion inhibition performance of ES on AISI 1020 carbon steel immersed in 1.0 M hydrochloric acid (HCl) was evaluated using the weight-loss technique over a three-day immersion period. The physicochemical characteristics of the ES were analysed using Fourier Transform Infrared Spectroscopy (FTIR) to recognise the functional groups. In addition, Scanning Electron Microscopy (SEM) was employed to observe the surface morphology of the steel samples after immersion in the acidic solution. The results showed that the addition of ES significantly reduced the corrosion rate of steel, achieving a maximum inhibition efficiency of 99.74%. This high efficiency indicates the formation of a protective barrier layer on the metal surface due to the adsorption of CaCO₃ compounds. Furthermore, the inhibition efficiency increased with increasing inhibitor concentration, demonstrating a concentration-dependent inhibition mechanism. These findings confirm that eggshell powder is an effective and environmentally sustainable corrosion inhibitor for acidic environments.
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