The Effect of Mangosteen Peel Extract Concentration as a Corrosion Inhibitor on Low Carbon Steel in NaCl Media

Abstract

This study aims to investigate the effectiveness of mangosteen peel extract as a corrosion inhibitor on low carbon steel in a NaCl environment. Corrosion of low carbon steel is a significant issue in the industry, especially in chloride-containing environments. The weight loss method was used to measure the corrosion rate, while the form of corrosion was examined using the photomacro method with a digital microscope. The research was conducted by immersing low carbon steel specimens in a NaCl solution. The experimental research method involved corrosion testing on mild steel plates in a NaCl 3% solution with varying concentrations of mangosteen peel extract (100 ppm, 200 ppm, 300 ppm, 500 ppm, 600 ppm). The results show that the mangosteen peel extract is effective in reducing the corrosion rate, with a concentration of 200 ppm showing the highest inhibition efficiency. Analysis indicates an increase in corrosion resistance, suggesting the formation of a protective layer by the extract on the steel surface. The conclusion of this study is that mangosteen peel extract has potential as an environmentally friendly and effective corrosion inhibitor for the protection of low carbon steel in chloride-containing media. Further research is recommended to optimize the formulation and application of the extract on an industrial scale.