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Syamsuir
Universitas Negeri Jakarta
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NILAI KEKERASAN PASCA QUENCHING MEDIA CLAY PADA LAPISAN LAS DI ATAS MILD STEEL Sopiyan; Syamsuir
Jurnal Konversi Energi dan Manufaktur Vol. 6 No. 1 (2019)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.414 KB) | DOI: 10.21009/JKEM.6.1.2

Abstract

Proses hardfacing menggunakan jenis SMAW, dengan polaritas DC+, arus yang digunakan 130A, elektroda HV 350. Setelah spesimen di las (satu lapis), kemudian langsung dicelup ke dalam air. Setelah mendingin, spesimen grinding, amplas kemudian dilakukan heat treatment 1000oC holding time 10 menit dan quenching dengan media clay. Spesimen yang telah di quenching sebelumnya dipoles dan etsa dengan nital lalu dilakukan pengujian kekerasan dan mikrostruktrur. Nilai kekerasan yang didapatkan dari sebelum dan sesudah quenching dengan media clay adalah sebesar 250 dan 296,93 HV.
EFEK PENGADUKAN SAAT PELAPISAN TEMBAGA PADA ALUMUNIUM TERHADAP LAJU KOROSI Syamsuir; Hamzah Fajar; Kurniawan Widodo; Sopiyan
Jurnal Konversi Energi dan Manufaktur Vol. 6 No. 1 (2019)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.745 KB) | DOI: 10.21009/JKEM.6.1.8

Abstract

Penggunaan alumunium yang dilapis tembaga akan lebih ekonomis jika dibandingkan dengan pengunaan tembaga pejal. Saat ini penggunaan tembaga dalam dunia medis banyak dibutuhkan,karena dapat berfungsi sebagai anti bakteri (oligodinamik). Dalam penelitian ini akan dilakukan proses elektroplating dengan pelapis tembaga di atas substrat alumunium. Pada proses elektroplating tersebut akan ditambahkan juga proses pengadukan sebesar 300 rpm. Hal ini dilakukan agar distribusi ion merata. Pada proses elektroplating tembaga menggunakan kuat arus 20 mA,voltase 1,2 V selama 30 menit dengan komposisi larutan CuSO4 220gr/L dan H2SO4 20ml/L. Bedasarkan hasil uji korosi yang di dapat dengan diaduk maka laju korosinya meningkat. Laju korosi terendah pada substrat yang telah di lapisi dengan tembaga tanpa pengadukan. Terlihat pergeseran potensial korosi (Ekorosi) sekitar ±0,4V ketika dilapisi dengan tembaga, baik dengan pengadukan maupun tidak. Permukaan lapisan tembaga terlihat lebih seragam ketika dilakukan pengadukan saat proses elektroplating.
PENGARUH VARIASI TEKANAN SANDBLASTING TERHADAP LAPISAN HASIL POWDER COATING Syamsuir; Yos Nofendri; Boy Martino; Naufan Erzha Sulistiono; Galih Panji Saputro; Ihsan Ady Prasetyo; Afdhal Fuaddy
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.6

Abstract

The problem of motor vehicles made from low carbon steel is corrosion. Almost all automotive components require coatings with the aim of protecting structures that are generally made of carbon steel from corrosion attacks. There are many techniques in painting, one of which is the powder coating technique, which is powder paint (powder) which can be loaded with static electricity to facilitate the process of painting using objects made of metal. Surface preparation needs to be done before the powder coating process is carried out. The most common preparation is by sandblasting, administration of phosphoric acid, or sandpaper. From the three preparations mentioned, the sandblasting method can be adjusted so that the pressure can get the desired roughness. So in this study, the effects of sandblasting pressure (4,5, and 6 bar) on the powder coating layer will be discussed. From the research that has been done, specimens with a pressure of 5 bar showed the highest abrasion resistance and contact angle.
PENGARUH SUHU DAN LAMA TEMPER TERHADAP KEKERASAN DAN TAHAN AUS BAJA HQ 760 Syamsuir
Jurnal Konversi Energi dan Manufaktur Vol. 5 No. 1 (2018)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.73 KB) | DOI: 10.21009/JKEM.5.1.5

Abstract

Peneltian ini bertujuan untuk mengetahui pengaruh temperature tempering dan lama waktu tahan temper terhadap kekerasan dan daya tahan aus baja HQ 760. Pelaksanaan penelitian adalah sebagai berikut; specimen uji dipanasakan pada suhu austenisasi (850oC) selama 30 menit, selanjutnya didinginkan dengan cepat (quenching) dalam media oli dan kemudian distemper pada suhu 150, 200, 250, 350, dan 600 oC masing-masing selama 30, 60 dan 180 menit. Pengujian kekerasan dilakukan dengan metode indentasi Vickers, besarnya beban penekan yang diberikan adalah 50 kg. pengujian daya tahan aus dilakuan dengan metode dray sliding test. Hasil penelitian menunjukan terdapat pengaruh temperature temper terhadap kekerasan baja HQ760. Kekerasan terbaik diperoleh pada suhu temper antara 250oC sampai dengan 250oC. Sementara itu daya thana aus berbanding lurus dengan angka kekerasan benda uji. Semakin tinggi angka kekerasan benda uji, maka semakin sedikit jumlah masa benda uji yang hilang akibat terjadi gesekan antara permukaan benda uji dengan permukaan pelat penggesek
KEHILANGAN MASSA LAPISAN TEMBAGA-NIKEL/TEMBAGA-NIKEL-SILIKON PADA LARUTAN HCl Siska Titik Dwiyati; Muhammad Teguh Pangestu; Syamsuir
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.4

Abstract

The purpose of this study was to determine the effect of variations in the electroplating time of copper-nickel and copper-nickel-silicon on the corrosion rate of low carbon steel. Copper-nickel and copper-nickel-silicon electroplating were carried out for 10, 20, and 30 minutes. Then the corrosion test was carried out using the weight reduction method for 60 minutes, but every 15 minutes the sample was weighed to see the mass lost. The corrosion rate of copper-nickel plating specimens on low carbon steel in a 3.5% HCl corrosive solution at a plating time of 30 minutes has the highest resistance compared to other time variations of copper-nickel specimens, namely the 15th-minute mass loss of 0.0022 grams. , the mass loss of the second 15 minutes (30 minutes) was 0.0014 grams, the mass loss of the third 15 minutes (45 minutes) was 0.0014 grams, and the mass loss of the fourth 15 minutes (60 minutes) was 0.0021 grams. The corrosion rate of copper-nickel-silicon plating specimens on low carbon steel in a 3.5% HCl corrosive solution at a plating time of 20 minutes has the highest resistance compared to other time variations, namely mass loss in the first 15 minutes of 0.0021 grams, mass loss The second 15 minutes (30 minutes) was 0.0008 grams, the mass loss in the third 15 minutes (45 minutes) was 0.0013 grams, and the mass loss for the fourth 15 minutes (60 minutes) was 0.0015 grams.
PELAPISAN TEMBAGA NIKEL PADA BAJA DAN PENGARUHNYA TERHADAP LAJU KOROSI Syamsuir
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 2 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.2.4

Abstract

The study was conducted to determine the effect of Cu-Ni coating on the corrosion rate of low carbon steel Ms 7210. The first stage of the study was Cu plating on the surface of the test sample with variations in coating holding times of 5, 10, 15, 20, and 25 minutes. The second stage is nickel plating for 10 minutes. The results showed that there was a decrease in the corrosion rate up to 0.36 mmpy when coating for 25 minutes. When compared with the raw material corrosion rate of 7.6 mmpy, the corrosion rate of steel after being coated is much lower. The longer the holding time of the coating, the thicker the layer formed, and the harder the surface that occurs, but it has an impact on decreasing the corrosion rate in the corrosive medium of 3.5% NaCl solution.
SISTEM RESIRKULASI AIR OTOMATIS UNTUK PENGHEMATAN AIR BERSIH DAN ENERGI PADA BUDIDAYA IKAN NILA Ragil Sukarno; Muhammad Fajar Ramadhan; Farezi Andriansyah; Yudha Adigutama; Syamsuir; Hari Sampurno
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 1 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.1.5

Abstract

The acidity and turbidity of water are essential factors in tilapia farming, so it is necessary to control the acidity (pH) and turbidity (NTU) of water. This research aims to develop an automatic water recirculation system to save the use of clean water and energy consumption in tilapia fish farming using a microcontroller based on pH and turbidity (NTU) values. The research method used is experimental, starting with design and manfacture an Experimental apparatus in the form of a fish pond from a box-shaped tarpaulin, a filter system, a water circulation system consisting of pipes and a pump that has a suction power of 25 lpm, an Arduino-based microcontroller water quality controller. Tests were carried out by comparing water's pH and NTU values before and after filtering. The results showed that using a water recirculation system in a fish pond equipped with a filter system and an Arduino-based microcontroller system can significantly maintain the pH value and reduce the turbidity level (NTU). Using a recirculation system provides energy savings for pump consumption of 51.4% at a water flow rate of 15 lpm and 32.3% at a water flow rate of 25 lpm compared to conventional systems. Overall, the recirculation system provides the benefits of energy savings in pump operation, savings in water usage, and controlled water quality.
Co-Authors Afdhal Fuaddy Boy Martino Farezi Andriansyah Galih Panji Saputro Hamzah Fajar Hari Sampurno Ihsan Ady Prasetyo Kurniawan Widodo Muhammad Fajar Ramadhan Muhammad Teguh Pangestu Naufan Erzha Sulistiono Nofendri, Yos Ragil Sukarno Siska Titik Dwiyati Sopiyan Yudha Adigutama