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All Journal Jurnal Teknik Industri Terintegrasi (JUTIN)
Ramadhan, Rizky Setiawan
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Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Stabilisasi Bioetanol Terhadap Korosi Logam Menggunakan Inhibitor Alami Berbasis Minyak Pala Nisrina, Hernita Zaida; Alya, Nazwa; Ramadhan, Rizky Setiawan
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 1 (2026): January
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i1.54907

Abstract

This research evaluates the potential of nutmeg essential oil as an environmentally friendly corrosion inhibitor for carbon steel in a bioethanol medium. GC-MS analysis identified 23 compounds, with the major components including sabinene (21.3%), α-pinene (18.7%), β-pinene (12.4%), myristicin (8.9%), and limonene (7.2%). Weight loss testing over 90 days showed the control system had a corrosion rate of 2.847 mm/year, which significantly decreased to 0.412 mm/year with the addition of 750 ppm nutmeg oil, resulting in an optimal inhibition efficiency of 85.5%. Increasing the concentration to 1000 ppm did not provide a significant improvement, indicating adsorption saturation on the metal surface. Electrochemical characterization thru potentiodynamic polarization curves showed a shift in corrosion potential from -0.687 V to -0.523 V and a decrease in corrosion current density from 48.3 μA/cm² to 6.8 μA/cm² at the optimal concentration, confirming nutmeg oil as a mixed-type inhibitor. Electrochemical impedance spectroscopy showed an increase in polarization resistance from 245 Ω·cm² to 1,687 Ω·cm², consistent with the weight loss data.
Co-Authors Alya, Nazwa Nisrina, Hernita Zaida