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All Journal Rotasi CHEMICA Jurnal Teknik Kimia Rekayasa Mesin Sinergi Jurnal Teknik Sipil Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Indonesian Journal of Chemistry Jurnal Pendidikan dan Konseling International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) International Journal of Community Service Jurnal Rekayasa Energi dan Mekanika JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) International Journal of Innovation in Mechanical Engineering and Advanced Materials Journal Of Carbazon
Sagir Alva
Universitas Mercu Buana
Religion Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Journal : Jurnal Teknik Mesin

 1 
STUDI DAN KARAKTERISASI LAJU KOROSI LOGAM ALUMINIUM DENGAN PELAPISAN MEMBRAN SOL-GEL Rohadi Satrio Budi Utomo; Sagir Alva
Jurnal Teknik Mesin Vol 6, No 3 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v6i3.1969

Abstract

Dari beberapa logam seperti baja, tembaga, seng, aluminium dan paduannya, maka aluminium memiliki keunggulan, terutama dalam hal ketahanan terhadap korosi. Ketahanan korosi yang sangat baik oleh aluminium disebabkan oleh adanya lapisan oksida tipis yang menempel sangat kuat di permukaannya (Al2O3). Lapisan Al2O3 stabil pada lingkungan pH 4 s/d pH 9 (pasifasi) sehingga lapisan tersebut dapat melindungi logam bagian dalam dari serangan korosi lanjutan, namun aluminium dapat juga terkorosi dalam lingkungan yang agresif yaitu di luar kisaran pH tersebut terutama suasana asam maupun basa. Hal ini dapat diatasi dengan memberikan coating berupa cat logam terhadap aluminium. Akan tetapi pemberian cat logam tidak dapat dilakukan pada situasi tertentu yang mengharuskan adanya reaksi antara logam dengan lingkungan asam ataupun basa dengan tetap mempertimbangkan ketahan korosi material tersebut, seperti yang terjadi pada baterai. Ini dikarenakan sifat cat yang membendung reaksi antara logam dengan lingkungannya. Oleh karena itu diperlukan penambahan inhibitor korosi dengan mempertimbangkan faktor di atas, yaitu dengan pelapisan membran Sol-Gel. Dari hasil pengujian Sol-Gel yang dilapisi pada aluminium mampu menahan laju korosi pada larutan HCl sebesar 24,26% dan larutan Asam Asetat sebesar 25,57% dibandingkan aluminium tanpa pelapisan. Kemudian membran Sol-Gel juga membuat lapisan pelindung laju korosi yang memiliki pori-pori dengan lebar celah ± 0,56 – 1,12 µm pada pengujian dengan larutan HCl dan ± 0,47 – 1,41 µm pada pengujian dengan larutan Asam Asetat sebagai jalan terjadinya reaksi antara logam dan cairan asam atau basa.
Analisis Potensi Limbah Logam/Kaleng, Studi Kasus di Keluarahan Meruya Selatan, Jakarta Barat Rini Anggraini; Sagir Alva; Popy Yuliarty; Teddy Kurniawan
Jurnal Teknik Mesin Vol 7, No 2 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v7i2.3022

Abstract

          Sampah atau limbah padat  merupakan material sisa yang dapat memberikan dampak negative karena dapat merusak lingkungan, tetapi juga dapat memberikan dampak positif apabila dikelola dengan teknik tertentu. Limbah logam merupakan limbah yang mudah dipisahkan dari timbunan sampah dan dapat didaur ulang menjadi barang – barang yang bernilai seni, dilebur kembali sebagai menjadi material asalnya, dan juga dapat dimanfaatkan sebagai campuran semen dan sebagainya.Penelitian ini bertujuan untuk mengetahui potensi limbah logam yang ada di Kelurahan Meruya Selatan Jakarta Barat. Penelitian dilakukan dengan melakukan observasi ke lokasi penelitian, melakukan wawancara dengan pihak-pihak yang terkait dengan penelitian dan dengan menyebarkan kuesioner. Sedangkan untuk mengetahui potensi limbah logam di wilayah penelitian, menggunakan analisa  teknik analisa data berkala.             Hasil penelitian  menunjukkan bahwa jumlah limbah logam yang terkumpul di Bank Sampah RW 4 dan RW 9 Kelurahan Meruya Selatan menunjukkan kenaikan selama tahun 2016 dan 2017, meskipun dari segi kuantitas jumlahnya kecil. Hasil analisa trend untuk limbah besi adalah Y  =    -  2,005 +  0,69X, untuk limbah aluminium Y  = -  0,6765  +  0,183X  , untuk limbah kaleng Y  =   2,0169   +  0,0042X  , dan untuk total limbah logam Y  =  - 0,71   +  0,0042X. Dimana Y merupakan variabel jumlah limbah dan X merupakan variabel waktu.
Analysis of The Effect of Temperature Variations and Natural Gas Flow on Zinc Oxide (Zno) Quality Results Using The French Method Suyadi, Yadi; Alva, Sagir
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i2.31993

Abstract

This study aims to analyze the effect of temperature and gas flow variations on the quality of Zinc Oxide (ZnO) produced in terms of particle size and product purity using the French method. The French method is a standard production technique used to manufacture ZnO, which utilizes the oxidation of zinc metal at high temperatures. The problem in the ZnO manufacturing process is determining what natural gas temperature and flow will be used to obtain the best quality, considering fuel consumption and production efficiency. In this study, temperature variations of 900°C, 1000°C, and 1100°C and natural gas flow using CNG (Compressed Natural Gas) with variations of 50 m3/hour, 55m3/hour, 60m3/hour were applied to understand how these parameters affect the properties of the resulting ZnO, characterization of the results was carried out using the complexometric titration method with ethylenediaminetetraacetic acid (EDTA) solution to determine the purity of the resulting ZnO and using a laser diffraction instrument to examine the size of ZnO particles. The results showed that the process temperature significantly affected the purity of ZnO. At a temperature of 1100 °C, the purity of ZnO reached 99.94%, which is the testing value in this study. At a gas flow of 60 m3/h, the purity of ZnO tends to be stable at a value of 99.93–99.94%. Meanwhile, the results of particle measurements at a temperature of 900°C with a gas flow of 50 m3/h, D50 reached 1.235 µm. At a temperature of 1100°C with a gas flow of 60 m3/h, D50 decreased to 1.089 µm. This particle size indicates that high temperatures encourage agglomeration reduction, resulting in finer ZnO particles. This study concludes that temperature and gas flow parameters play an important role in controlling the quality of ZnO produced through the method, with oxygen gas flow at high temperatures giving optimal results.
STUDY OF FINITE DIFFERENCE METHOD IN HEAT FLOW SIMULATION OF TWO-CHAMBER THERMOS SEPARATOR MADE OF POLYPROPYLENE USING MATLAB APPLICATIONS Pandriana, Aap; Pudjiwati, Sri; Alva, Sagir; Tarigan, Kontan; Sudarma, Andi Firdaus; Khaerudini, Deni Shidqi
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 13, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v13i2.27803

Abstract

Heat transfer can be defined as transfer of energy from one area to another as a result of temperature differences in objects. This indicates heat transfer not only explains how heat energy is transferred from one object to another, but can also predict the rate of heat transfer that occurs under certain conditions. In this case, what is related to the heat flow model equation is two-chamber thermos separator where the separator is made of polypropylene. This separator functions to prevent the flow of heat from one side to the other side of the thermos tube. Polypropylene is included in the insulator category, although heat transfer still occurs. The heat transfer will be calculated using the finite difference method in parabolic partial differential equations using the Matlab application. The heat transfer process is assumed to occur by conduction, with a separator length of 1 cm. Assume the first side of the divider has a right temperature of 100°c, and the other side 20°c. The temperature point measured on the separator is located in the center of the separator. After completing the solution using the Matlab application with the finite difference method, a heat transfer flow simulation was obtained in the two-chamber thermos separator which shows the heat flow transfer at any time. At 0.1 seconds the temperature at T1 is 2.4°c, while at 10 seconds  is 65.9704°c. Then at 0.1 seconds the temperature at T4 is 0.48°c, while at 10 seconds 19.5436°c. The conclusion is in the separator of the two-chamber thermos there is significant heat flow from the side of the first tube to the other side.
Experimental Investigation of the Corrosion Rate of Factory-Original Motorcycle Exhausts in NaCl Solution and Natural Seawater Fadhilla, Eky Nur; Alva, Sagir
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 3 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i3.36552

Abstract

Abstract-- Corrosion is a significant factor that decreases the performance and service life of motorcycle components, especially exhaust pipes that are directly exposed to the environment. This study aims to analyze and compare the corrosion rate of factory-made motorcycle exhausts when exposed to two corrosive media: a 3.5 wt% sodium chloride (NaCl) solution and natural seawater. An immersion test was conducted under laboratory conditions for seven days (168 h) using eight AISI 1010 coupons (2 × 2 cm). Four specimens were immersed in seawater, and four in 3.5 % NaCl. After pickling, each coupon was weighed, immersed, cleaned, and re-weighed. Mass loss was converted to a corrosion rate using the gravimetric method and expressed in millimeters per year (mm· year¹). The average corrosion rate in seawater was 4,121.9 mm/year, whereas in 3.5% NaCl it was 71.7 mm/year. The significantly higher rate in seawater is attributed to additional ions, such as magnesium, calcium, and sulfate, that accelerate electrochemical reactions. These findings underscore the importance of adequate surface protection for exhaust pipes, particularly for motorcycles operating in coastal or high-humidity environments, and serve as a basis for developing corrosion-resistant materials or coatings for automotive components.
Co-Authors Adelfy Dara Arianti Agnes Hanna Patty, Armin Naibaho, Singgih Fitra Utama, Ahmad Ariri Ahmad Kamal Arifin Aiman Sajidah Abd Aziz Aiman Sajidah binti Abdul Aziz Albert Phak Jie Wong Ali Rinaldi Andi Firdaus Sudarma Arianti, Adelfy Dara Arifin, Ahmad Kamal Ariri, Ahmad Asadullah, Mas'ud Asadullah, Masud Asep Setia Kristanto Ayu Arwati, I G. Baihaqi Baihaqi Basyari, Aziz Binawati Ginting Dafit Feriyanto Dayanti, Meri Deni Shidqi Khaerudini Edy Herianto Majlan Eka Safitri Eka Safitri Elin Yusibani Elly Sufriadi Fadhilla, Eky Nur Fidi Fidi Fidi, Fidi Fitri , Muhammad Fitri Dara Fonna, Syafrizal Friliandita, Vivi G. Ayu Arwati, I Ginting, Dianta Hadi Pranoto Hadi Pranoto Hasbullah, Siti Aishah I Gusti Ayu Arwati Ibdal Satar Imam Hidayat Iqhrammullah, Muhammad Julinawati Julinawati Julinawati, Julinawati Khairi Suhud KHAIRI SUHUD Kurniawan Kurniawan Leni Heliawati Marysca Shintya Dewi Mas'ud Asadullah Mohd Ismahadi bin Syono Muhammad Farhan Muhammad Fitri, Muhammad Muhammad Ihsan Muhammad Isa Mustanir Mustanir Nanang Ruhyat Noviyanto, Alfian Noviyanto, Alvian Nurato , Nurato Nurul Islami, Nurul Pandriana, Aap Popy Yuliarty Pudjiwati, Sri Resista Vikaliana Resmi Bestari Muin Rinaldi, Ali Rini Anggraini Rita Sundari Robi Suherman Rohadi Satrio Budi Utomo Sawarni Hasibuan Siti Aishah Hasbullah Subekti Subekti Sudarma, Andi Firdaus Suhud, Khairi Sukoma, Sukoma Sundari, Rita Supaat Zakaria Surbakti, Muhammad Syukri Suyadi, Yadi Swandya Eka Pratiwi, Swandya Eka Syafrizal Fonna Tarigan, Kontan Teddy Kurniawan Thasyah Pitanova Vivi Friliandita Wahyu Irwansyah Wahyudi, Haris Wan Adil bin Wan Jamil Wan Adil Wan Jamil Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Wiwit Suprihatiningsih Zakaria Zakaria Zulnazri, Z