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Yunia Maulida
Departement of Chemistry, Faculty of Mathematics and Natural Science, University of Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Experimental and Theoretical Studies of Black Cumin Seed (Nigella sativa) Extract as Corrosion Inhibitor for ASTM A36 Steel Yunia Maulida; Saprini Hamdiani; Sudirman Sudirman; Saprizal Hadisaputra
Jurnal Penelitian Pendidikan IPA Vol 10 No 12 (2024): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i12.8565

Abstract

Black cumin seed extract (Nigella sativa) is effective to control ASTM A36 steel corrosion in 1 M HCl solution. This study analyzed black cumin seed (BCS) extract as a corrosion inhibitor (0 to 500 ppm) by electrochemical method including Potentiodynamic Polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS). The results revealed that with the PDP method the highest inhibition efficiency (IE) was 84.26% at the concentration of 500 ppm, and with the EIS method the IE value was 77.77% at the same concentration. The components of the extract were analyzed by GCMS and obtained major compounds are linoleic acid (22.12%), methyl linoleate (22.70%), 4-cyclopentene-1,3-dione,4-3-methyl-2-butenyl) (7.64%), methyl palmitate (6.66%), and palmitic acid (5.14%). A theoretical approach with computation was also carried out to investigate the performance and interaction of the major compounds in the BCS extract that a significant role as inhibitor. This was using Density Functional Theory (DFT) method and Monte Carlo simulation. The results showed that methyl linoleate compound as the most significant role.
Co-Authors Saprini Hamdiani Saprizal Hadisaputra Sudirman Sudirman