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All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) ARMATUR : Artikel Teknik Mesin dan Manufaktur
Muhammad Rifqi Dwi Septian
Institut Teknologi Sumatera
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemistry Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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Pelapisan Antikorosi berbasis LDPE dari Limbah Kantong Plastik melalui Metode Catalytic Liquefaction Dwi Miftha Kurnia; Randy Yusuf Kurniawan; Muhammad Rifqi Dwi Septian; Rikki Nababan; Pradeha Bnesari Fitrah Lanharto; Ummi Kulsum Hidayati
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11319

Abstract

Penelitian ini mengkaji pemanfaatan polimer LDPE yang berasal dari limbah kantong plastik sebagai inhibitor korosi pada besi. Proses pencairan LDPE dilakukan dengan menggunakan metode Catalytic Liquefaction dengan katalis ZnCl₂ pada suhu 300°C selama 30 menit. Pengujian karakteristik gugus fungsi dilakukan menggunakan spektrofotometer FTIR, sedangkan efektivitas inhibisi korosi dievaluasi melalui metode pengurangan berat (weight loss) dan Electrochemical Impedance Spectroscopy (EIS) dalam media NaCl 3%, NaCl 5%, HCl 3%, dan HCl 5%. Hasil penelitian ini menunjukkan bahwa polimer LDPE mampu secara signifikan menurunkan laju korosi besi. Efisiensi inhibisi tertinggi diperoleh sebesar 76,84% dalam larutan NaCl 5% dengan konsentrasi inhibitor 5 gram. Analisis EIS menunjukkan efektivitas LDPE ditandai dengan nilai total impedansi yang lebih tinggi dibandingkan tanpa penambahan LDPE (8,21 Ω vs. 5,29 Ω). Adsorpsi molekul LDPE pada permukaan logam mengikuti isoterm adsorpsi Langmuir. Penelitian ini menunjukkan potensi besar dalam pemanfaatan limbah plastik sebagai material antikorosi yang ramah lingkungan.
Efek Cyclea Barbata Miers terhadap Viskositas Polimer Xanthan Gum untuk Reservoir 70°C Rozi Afdi; Muhammad Rifqi Dwi Septian; Mohamad Obby Adianto
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 2 (2026): May
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i2.1801

Abstract

One method to further enhance oil production is through tertiary recovery, also known as Enhanced oil recovery (EOR). The EOR method can increase production from wells by up to 75% recovery. One of the EOR technologies that has been applied for more than 50 years in the petroleum industry is polymer injection, which has proven effective in improving oil recovery. The objective of this study is to obtain an efficient polymer with good compatibility and viscosity. This research analyzes the compatibility and viscosity characteristics of Xanthan Gum (XG) polymer solutions and a mixture of Xanthan Gum with Cyclea  barbata Miers (CHXG) in formation water with a salinity of 11,000 mg/L. Compatibility tests were conducted at concentrations of 1,000, 2,000, and 3,000 mg/L to determine the solubility of the polymer in formation water. The results show that both types of polymers have good compatibility, indicated by the absence of precipitation and the formation of clear and homogeneous solutions. Viscosity tests were carried out at room temperature and at elevated temperature (70°C) to evaluate the effect of temperature on the rheological properties of the solutions. The XG polymer exhibited a decrease in viscosity at 70°C, with the highest reduction of 24.3% at a concentration of 3,000 mg/L. In contrast, the CHXG polymer showed a significant increase in viscosity at high temperature, with the highest increase reaching 53.49% at the same concentration. These results indicate that the addition of Cyclea  barbata Miers can enhance the thermal stability and viscosity performance of the polymer under reservoir conditions at 70°C, whereas the use of Xanthan Gum alone results in a decrease in viscosity at the same temperature.
Co-Authors Dwi Miftha Kurnia Mohamad Obby Adianto Pradeha Bnesari Fitrah Lanharto Randy Yusuf Kurniawan Rikki Nababan Rozi Afdi Ummi Kulsum Hidayati