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All Journal Al-Kimia Journal of Mechanical Engineering, Science, and Innovation
Sutarno Sutarno
Universitas Jenderal Achmad Yani
Chemistry Control & Systems Engineering Energy Engineering Mechanical Engineering

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Pengaruh Konsentrasi Tembaga dan Rapat Arus terhadap Morfologi Endapan Elektrodeposisi Tembaga Soleh Wahyudi; Syoni Soepriyanto; Mohammad Zaki Mubarok; Sutarno Sutarno
Al-Kimia Vol 7 No 2 (2019): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (841.695 KB) | DOI: 10.24252/al-kimia.v7i2.7818

Abstract

Copper deposits have been obtained by the electrolysis method using copper sulfate and sulfuric acid. The effect of copper concentration and current density on the surface morphology of copper deposits and current efficiency have been studied. The variation of copper concentration is 0.04 M and 0.8 M and the variation of current density is 2-8 A/dm2. The copper deposits will be photographed macro, weighed and characterized by Scanning Electron Microscope (SEM) to determine the surface morphology of deposits and Energy-Dispersive X-ray spectroscopy (EDX) to determine the chemical composition of deposits. The surface morphology of copper deposits in the form of compact and without nodules was reached at copper concentration is 0.8 M and the current density is 2 A/dm2 with the average of current efficiency is 96%.
Risk Assessment Strategy for Corrosion Under Insulation of Nano Technology Insulation on Geothermal Pipeline Andiani Setia Wardani; Ekha Panji Syuryana; Sutarno Sutarno; Basuki Nugroho; Gian Ganjar Zatnika; Gusti Verhan Pratama; Moch. Salman Fadillah Suardana
Journal of Mechanical Engineering, Science, and Innovation Vol 2, No 2 (2022): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2022.v2i2.3199

Abstract

Pipelines are important in geothermal and most of the pipe materials are carbon steel insulated. Pipe insulation that is often used in general is prone to wetness, heat loss, and corrosion. Corrosion is a problem especially Corrosion Under Insulation (CUI). This corrosion results in pipeline leakage. The selection of nano-tech insulation is a way to overcome CUI and extend service life pipe usage. The study used JIS S45C 1×1 cm insulated with nanotechnology by dripping 3.5% NaCl for 3 days and room temperature. Corrosion rate, metallography, and roughness were sought so that the corrosion rate was 0.0894 mpy, the average surface area corroded was 2.22 mm². The original roughness value is 0.528 - 1.725 mm. This shows that the nano- tech insulator minimizes the formation of CUI on the specimen.
Co-Authors Andiani Setia Wardani Basuki Nugroho Ekha Panji Syuryana Gian Ganjar Zatnika Gusti Verhan Pratama Moch. Salman Fadillah Suardana Mohammad Zaki Mubarok Soleh Wahyudi Syoni Soepriyanto