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All Journal International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Sasmito, Muhammad
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Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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SUSTAINABLE CORROSION INHIBITION OF COPPER USING SANTOL (SANDORICUM KOETJAPE) FRUIT PEEL EXTRACT IN ACIDIC MEDIUM Ainunsyah, Zul; Gapsari , Femiana; Darmadi, Djarot B.; Sasmito, Muhammad
International Journal of Mechanical Engineering Technologies and Applications Vol. 7 No. 1 (2026): January - June
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776//MECHTA.2026.007.01.9

Abstract

Corrosion control is crucial to material protection, particularly in industrial applications where metal degradation leads to significant economic losses. One of the major challenges in corrosion research is finding effective and eco-friendly inhibitors that can replace traditional toxic chemical inhibitors. This study explores the use of Santol (Sandoricum koetjape) fruit peel extract as a potential green inhibitor for copper corrosion in a 1 M HNO3 solution. Electrochemical techniques, including potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS), were used to evaluate the inhibition efficiency of the extract. The results showed a significant reduction in the corrosion rate, with an inhibition efficiency of 77.33% from PDP analysis and 97.50% from EIS measurements. The corrosion current density decreased from 1408.30 microA to 319.25 microA, and the charge transfer resistance increased from 22.56 Ohm to 902.88 Ohm. Santol fruit peel extract effectively inhibits copper corrosion, promoting the development of sustainable corrosion inhibitors and using agricultural waste as an alternative to conventional chemical inhibitors.
Co-Authors Ainunsyah, Zul Djarot B. Darmadi, Djarot B. Gapsari , Femiana