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All Journal International Journal of Electrical and Computer Engineering Jurnal Pendidikan Teknologi dan Kejuruan Communications in Science and Technology NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Metalurgi Jurnal Sains Teknologi Transportasi Maritim Journal of Technomaterial Physics Makara Journal of Technology International Journal of Innovation in Mechanical Engineering and Advanced Materials
Nono Darsono, Nono
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Corrosion behavior of super austenitic stainless steel, Duplex 2205 and 316L in sulfamic acid environment Roszardi, Bashari Rohululloh; Riastuti, Rini; Budiarto, Wahyu; Darsono, Nono; Syahid, Adi Noer
Jurnal Pendidikan Teknologi Kejuruan Vol 4 No 4 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v4i4.24323

Abstract

Currently, sulfamic acid as a primary chemical industrial material is ubiquitous. One of its uses is a sweetener. Due to its corrosive nature, it is necessary to use a suitable container to avoid contamination of the solution. Corrosion behavior of super austenitic stainless steel, duplex 2205, and 316L uncovered to sulfamic acid in diverse attention at ambient temperature had been investigated. Concentration Weight loss method, Potentiodynamic Polarization, and Electrochemical Impedance Spectroscopy (EIS) examined the corrosion rate. The result showed that the corrosion rate of material increased with the increasing concentration of sulfamic acid. Super austenitic stainless steel has higher corrosion resistance than duplex 2205 and 316L.
CORROSION BEHAVIOR OF SUPER AUSTENITIC STAINLESS STEEL, DUPLEX 2205 AND 316L IN SULFAMIC ACID ENVIRONMENT Roszardi, Bashari R; Riastuti, Rini; Budiarto, Wahyu; Darsono, Nono; Syahid, Adi Noer
NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Vol 9, No 2 (2022): NUSANTARA : Jurnal Ilmu Pengetahuan Sosial
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jips.v9i1.2022.85-91

Abstract

Currently, sulfuric acid as a primary chemical industrial material is ubiquitous. One of its uses is a sweetener. Due to its corrosive nature, it is necessary to use a suitable container to avoid contamination of the solution. Corrosion behavior of super austenitic stainless steel, duplex 2205, and 316L uncovered to sulfamic acid in diverse attention at ambient temperature had been investigated. Concentration Weight loss method, Potentiodynamic Polarization, and Electrochemical Impedance Spectroscopy (EIS) examined the corrosion rate. The result showed that the corrosion rate of material increased with the increasing concentration of sulfamic acid. Super austenitic stainless steel has higher corrosion resistance than duplex 2205 and 316L.  
Experimental comparison of air, oil, and liquid nitrogen cooling media on the efficiency of a single-phase transformer Nugraha, Heri; Imaduddin, Agung; Priandana, Eka Rakhman; Hermawan, Asep Dadan; Darsono, Nono; Pramono, Andika Widya; Syahid, Adi Noer; Palaloi, Sudirman; Herbirowo, Satrio; Hendrik, Hendrik
International Journal of Electrical and Computer Engineering (IJECE) Vol 16, No 1: February 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v16i1.pp25-35

Abstract

Transformers are critical component in electric power system, where minimizing energy losses is essential for efficiency and reliability. While ideal transformers operate with zero losses, practical transformers dissipate energy through winding and core losses caused by resistive heating. This study investigates the impact of three cooling media with ambient air, mineral oil, and liquid nitrogen on the efficiency and thermal performance of a 1 kVA single phase copper wound transformer. The experiment applied a resistive load under each cooling condition, recording input and output parameters using a HIOKI power meter model PW3360. Thermal behavior was monitored using infrared thermography and thermocouples. Copper winding resistivity was evaluated using a four-point probe within a cryogenic magnet system. The results show that liquid nitrogen cooling significantly reduced copper resistivity due to low-temperature conditions, achieving a transformer efficiency of 89.9%. Oil cooling improved efficiency to 86.0%, compared to 80.7% with air cooling. Although liquid nitrogen provided the greatest efficiency enhancement, its practical use is limited due to handling complexity and cost. In contrast, oil cooling offers a more feasible and effective solution for improving transformer performance in real world applications. These finding provide valuable insight for optimizing transformer thermal management strategies in power systems.
Co-Authors Abdurohman Adiwar Adiwar, Adiwar Adnan, Farrah Anis Fazliatun Agung Imaduddin, Agung Akhmad Syoufian Andika Widya Pramono Anggraeni, Widuri Azizi, Muhammad budiarto, wahyu Chollacoop, Nuwong Dafit Feriyanto Deni Shidqi Khaerudini Gerald Ensang Timuda Ginting, Dianta Hendrik Hendrik Heri Nugraha Hermawan, Asep Dadan Karna Wijaya Kurniawan Kurniawan Maulid, Nurul Mochamad Chalid Mustain, Iing Nabila Nurul Ikhlas Nelson Saksono Octaviani, Ana Nur priandana, eka rakhman Pudjiwati, Sri Putra, Yunata Mandala Rangkuti, Yusridah Rini Riastuti, Rini Roszardi, Bashari R Roszardi, Bashari Rohululloh Rozana, Kharistya Sanusi, Yasa Saputra, Dita Adi Satrio Herbirowo, Satrio Saviola, Aldino Javier sudirman palaloi Syahid, Adi Noer Syahrul Humaidi, Syahrul Tarigan, Kontan Vebryana, Marini Fairuz Wahyu Dita Saputri