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All Journal Jurnal Kartika Kimia
Lesmana, Dera
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Enhancing Corrosion Resistance of AISI 1045 Carbon Steel Using Rosmarinus officinalis Extract: An Environmentally Friendly Approach Pawawoi, Pawawoi; Putra, Adi Ganda; Lesmana, Dera; Prajitno, Djoko Hadi; Septianissa, Selly
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia (In Progress)
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.976

Abstract

Corrosion is the greatest challenge faced by various industries, especially those in maritime regions. This study evaluates the effectiveness of Rosmarinus officinalis extract as a corrosion inhibitor for carbon steel AISI 1045 in artificial seawater. Steel samples with varying inhibitor concentrations (0, 30, 60, 90, and 120 ppm) were immersed for 25 days. The results indicate that the weight gain due to corrosion for the sample without an inhibitor reached 79.5 mg, while the use of rosemary significantly reduced the weight gain, with the lowest corrosion rates recorded at 90 ppm (0.003 mpy) and 120 ppm (0.005 mpy). The optimal inhibitor efficiency was achieved at 60 ppm (75.57%). Microstructural analysis showed a decrease in pitting corrosion thickness and the formation of a new phase, Fe₃O₄, which is more stable and protective. These findings emphasize the potential of rosemary extract as an environmentally friendly solution for controlling corrosion in carbon steel, particularly in corrosive environments like seawater.
Co-Authors Adi Ganda Putra Djoko Hadi Prajitno Pawawoi, Pawawoi Selly Septianissa