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All Journal Jurnal Teknik ITS Rekayasa Mesin Journal of Engineering and Technological Sciences Indonesian Physical Review Prosiding Seminar Nasional Program Pengabdian Masyarakat Eduvest - Journal of Universal Studies Sewagati
Lukman Noerochim
Departemen Teknik Material & Metalurgi Institut Teknologi Sepuluh Nopember Surabaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Education Engineering Health Professions Languange, Linguistic, Communication & Media Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

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Pembuatan Alat Pemotong Keripik Berbasis Alumina (Al2O3) dari Lahar Dingin Gunung Semeru untuk Meningkatkan Kualitas Produksi Industri Makanan UD Sumber Makmur Senduro Kabupaten Lumajang Pratiwi, Vania Mitha; Purwaningsih, Hariyati; Kuriawan, Budi Agung; Widyastuti, Widyastuti; Fajarin, Rindang; Wibisono, Alvian Toto; Noerochim, Lukman; Setiyorini, Yuli; Pintowantoro, Sungging
Sewagati Vol 9 No 3 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i3.2653

Abstract

Usaha UMKM menjadi salah satu hal yang diperhatikan oleh pemerintah untuk ditingkatkan. Salah satu UMKM yang ada di lumajang adalah UD. Sumber Makmur yang berfokus menjual olahan singkong dan ubi seperti keripik. Produksi yang selalu dilakukan setiap hari membuat alat potong menjadi alat yang penting. Namun selama berjalannya produksi, alat potong tersebut mengalami penurunan kualitas pada mata pisaunya. Karena hal tersebut salah satu solusi yang bisa diberikan adalah dengan melapisi mata pisau tersebut dengan alumina yang bisa diekstraksi dari pasir vulkanik gunung Semeru. Pasir tersebut diekstraksi dengan melakukan leaching acuid, titrasi dan pemanasan yang nantinya dihasilkan serbuk alumina. Selanjutnya alumina tersebut digunakan untuk spray coating pada mata pisau. Lalu dilakukan uji karakterisasi dengan menggunakan 2 material pembanding yaitu carbon steel, dan HSS (High Speed Steel). Didapatkan hasil uji SEM memperlihatkan jika spesimen pisau komersial dan HSS memiliki kerapatan alumina yang bagus dan tersebar sangat merata. Pada uji polarisasi didapatkan hasil untuk material carbon steel, pisau komersial, dan HSS memiliki laju korosi sebesar 0,038897 mm/y; 0,020592 mm/y ; 0,010572 mm/y. Selian itu juga dilakukan sosialisasi kepada para pekerja sedikit wawasan tentang material alat potong dan manfaat dari dilakukannya coating ini.
EFFECT OF CALCINATION TEMPERATURE ON F-DOPED LiFePO4 CATHODE MATERIAL ON FORMATION OF OLIVINE PHASE Ramadhani, Ahmad Ilham; Noerochim, Lukman; Susanti, Diah; Sari, Eli Novita
Indonesian Physical Review Vol. 4 No. 3 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i3.99

Abstract

Olivine single phase of LiFePO4 was successfully synthesized by solid-state reaction (SSR) method through the formation of Fe2P2O7 from precursors of Li2CO3, F2O3, NH4H2PO4, and LiF as materials doping. Variations at temperatures of calcination 670 0C, 700 0C and 750 0C with doped 0.1F. TGA-DSC test results show that the LFP sample undergoes decomposition in the temperature range 0-600 0C. The olivine phase formed at temperatures of more than 650 0C and the oxidation process on the LiFePO4/C sample was completed, and the sample mass was constant. The olivine phase formed was determined by comparing the 2𝜃 value obtained through characterization with the ICDD LFP (01-081-1173), and accordingly with experiment. The increase of the temperature results from a dominant LFP phase with a larger grain size. The effect of increasing the calcination temperature at 0.1F has resulted in an enlargement of the particle size.
PEMETAAN KOROSIFITAS ATMOSFER MENGGUNAKAN LOGAM BAJA KARBON RENDAH DAN KARBON TINGGI PADA WILAYAH KOTA SURABAYA Rohmannudin, Tubagus Noor; Noerochim, Lukman; Sulistijono, Sulistijono; Achly, Fariza Hafizh; Tanjung, Rifqi Aulia
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1653

Abstract

Corrosion of metals is inevitable. One of the factors that affect corrosion is environmental conditions that contain pollutants like SO2, NO2, and Cl- which are found in many industrial and seaside areas. Surabaya is an area that has 2 types of conditions. In addition, Surabaya is the capital of the province where infrastructure development is running rapidly. Thus, this study maps the level of atmospheric corrosion in five areas in Surabaya by collecting corrosion rate data for 4 months with weight loss method using AISI 1020 Steel and SK5 Steel as test metals. XRD and SEM-EDX tests were conducted to compare the corrosion results. The average corrosion rate of low carbon steel was 0,6561 mpy and high carbon steel was 1,2523 mpy. The results concluded that the high level of atmospheric corrosivity of low carbon steel is in Sukomanunggal, Bulak, Rungkut, Pakal, Krembangan, and Bubutan sub-districts. The medium level is in Tegalsari, Gubeng, Tenggilis Mejoyo, Karang Pilang, Jambangan, Sawahan, and Dukuh Pakis sub-districts. The low level is in Lakarsantri, Mulyorejo, Simokerto, Sambikerep, Genteng, and Wonokromo sub-districts. Meanwhile, high atmospheric corrosivity levels for high carbon steel are in Krembangan, Karang Pilang, Bulak, Tenggilis Mejoyo, Pakal, and Jambangan sub-districts. The medium level is in Rungkut, Sawahan, Bubutan, Wonokromo, Tegalsari, Sukomanunggal, and Lakarsantri sub-districts. The level is in Dukuh Pakis, Genteng, Gubeng, Simokerto, Sambikerep, and Mulyorejo sub-districts. This mapping is based on the level of corrosion in each sub-district which is influenced by the presence of industry and its geographical location.
ANALISIS PENGARUH VARIASI HOLDING TIME ANNEALING TERHADAP LAJU KOROSI TITANIUM PADA LARUTAN CAIRAN TUBUH SINTETIS Rohmannudin, Tubagus Noor; Noerochim, Lukman; Sulistijono, Sulistijono; Luthfiansyah, Candra Rizki; Tanjung, Rifqi Aulia
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1654

Abstract

Biomaterials are crucial for bone implants due to their biocompatible and inert nature, ensuring no adverse effects within the human body. Titanium is renowned for its exceptional corrosion resistance. This research aims to analyze the impact of annealing holding time and pH of synthetic body fluid on the hardness and corrosion rate of titanium. The annealing process was performed at 700°C, with holding times of 30, 60, and 90 minutes. As an electrolyte medium, a Hanks' solution with pH variations of 4, 6, and 8 was used and maintained at 37°C. Potentiodynamic corrosion testing demonstrated the lowest corrosion rate in specimens treated with 30 minutes of annealing at pH 8, measuring 0.32 x 10-2 mmpy. The 30-minute annealing exhibited the lowest corrosion rate, which was confirmed by Electrochemical Impedance Spectroscopy (EIS) results showing a higher Rp value, indicating a lower corrosion rate. This is attributed to the presence of a passive Rutile TiO2 layer formed during the annealing process, as confirmed by X-ray Diffraction (XRD) analysis. Metallography observations indicated that the microstructure of untreated specimens consisted of α and β phases. Scanning Electron Microscopy (SEM) analysis of specimens annealed for 30 minutes revealed an oxide layer on the surface without any visible pores. However, an increase in annealing holding time led to the formation of pores, particularly noticeable after 90 minutes of annealing. The presence of pores in the oxide layer resulted in an increased corrosion rate with longer annealing holding times. Conversely, hardness testing demonstrated that longer annealing holding times resulted in higher hardness values.
Innovative Investigation and Strategy for Improving the Performance of 70% Alumina Refractory Roofs Against Thermal-Slag Corrosion and Extreme Temperatures in Electric Arc Furnaces (EAF) in the Nickel Matte Production Process Rohadi, Anggoro; Sulistijono, Sulistijono; Noerochim, Lukman; Sutarsis, Sutarsis; Purwaningsih, Hariyati
Eduvest - Journal of Universal Studies Vol. 5 No. 12 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i12.52513

Abstract

This study investigates the performance of 70% alumina refractories on the roof of an Electric Arc Furnace (EAF) in the nickel matte smelting process. The methods used include material characterization through X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX), thermodynamic simulation using FactSage, and thermal stress simulation based on Finite Element Analysis (FEA). The results of the study show a significant decrease in Al₂O₃ content to below 16% in the corrosion zone, as well as an increase in Fe₂O₃ which triggers the formation of corrosive hercynite (FeAl₂O₄) and magnesium spinel (MgAl₂O₄) phases. FactSage simulations confirmed the stability of these phases at temperatures of 1200–1400 °C. FEA results identified maximum stress concentrations in the central zone of the roof, approaching the strength limit of the refractory material. Based on these findings, the proposed mitigation strategies include: optimizing the brick geometry design to reduce stress (most realistic in the short term), increasing the alumina content and decreasing Fe₂O₃ in the refractory material (potentially effective, but requires economic evaluation), and controlling the furnace temperature distribution (most technically challenging). This study provides a comprehensive approach to designing more reliable and durable EAF refractories.
Co-Authors ,Angga Ade Purnawan Achly, Fariza Hafizh Ade Okta Yurwendra Agung Budi Kurniawan Agung Purniawan Ahmad Efendi Adi Pratama Ahmad Efendi Adi Pratama Alfanda, Benedicta Dian Alvian Toto Wibisono Amien Widodo Amy Reza Andrea Angga Ade Purnawan Ardhyananta, Hosta Asia Asia Azarine Atha Pandhani Azarine Atha Pandhani Bayu Kresna Purwaka Utama Bayu Kresna Purwaka Utama Berlian Aulia Rachman Daih Susanti Diah Susanti Diah Susanti Elok Amaylia Swasthika Candra Fajarin, Rindang Fakhreza Abdul Fikan Mubarok Rohimsyah Gede Panca Ady Sapputra Gita Akbar Satriawangsa Gita Akbar Satriawangsa Gita Akbar Satriawangsa Haniffudin Nurdiansah Haniffudin Nurdiansah Hariyati Purwaningsih Hendro Waluyo Ilham Azmy Jatimurti, Wikan Jeremy Adrian Kuriawan, Budi Agung Kusuma, George Endri Kusumadewi, Tri Vicca Luthfiansyah, Candra Rizki Mas Irfan Purbawanto Hidayat Mega Lazuardi Umar Mohamad Miftah Fadlika Makmur Muhamad Akbar Wicaksono Muhammad Ainun Taimiyah Indra Muhammad Dalu Prayoga Muhammad Dalu Prayoga Muhammad Imam Bukhori Muhammad Taufik Mukhammad Khoirul Umam Nizhamul Latif Novielly Lolong Pratiwi, Vania Mitha Ramadhani, Ahmad Ilham Rochman Rochiem Rohadi, Anggoro Rohmannudin, Tubagus Noor Ryan Tri Kurniawan Sari, Eli Novita Sheila Pramusiwi Rozitawati Sryang Tera Sarena Sryang Tera Sarena Sulistijono Sulistijono Sungging Pintowantoro Sutarsis Sutarsis Sutrisno, Wahyuniarsih Tanjung, Rifqi Aulia Tubagus Noor Rohmannudin, Tubagus Noor Tubagus Noor Rohmanudin Tubagus Noor Rohmanudin Wibisono, Alvian Toto Wicaksono, Sigit Tri Widyastuti Widyastuti Yeny Widya Rakhmawati Yeny Widya Rakhmawati Yuli Setiyorini Yusuf Kurniawan Zaid Sulaiman Zeddy Argasani