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Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl Triana, Yunita; Rinda, Sari Shaimah; Jatmoko, Awali; Sulitijono, Sulitijono
Specta Journal Vol 2 No 3 (2018): SPECTA Journal of Technology
Publisher : Specta Journal

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.

Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl Triana, Yunita; Rinda, Sari Shaimah; Jatmoko, Awali; Sulistijono, Sulistijono
SPECTA Journal of Technology Vol 2 No 3 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.

IMPLEMENTASI REPAIR GROVE BAN LAYAK PAKAI DAN PENGEMBANGAN PRODUKTIFITAS SUMBER DAYA MANUSIA UNTUK MASYARAKAT KARANG JOANG Awali, Jatmoko; Laksono, Andromeda Dwi; Ismail, Ika; Triana, Yunita; Syaifuddin, Ahmad
DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Vol 4, No 1 (2020)
Publisher : Politeknik Negeri Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32486/jd.v4i1.398

Pendidikan adalah modal utama bagi suatu bangsa dalam upaya meningkatkan kualitas sumberdaya manusia yang dimilikinya. Sumberdaya manusia yang berkualitas akan mampu mengelola sumber daya alam dan memberi layanan secara efektif dan efisien untuk meningkatkan kesejahteraan masyarakat. Maka dari itu, titik sentral pembangunan adalah pemberdayaan sumber daya manusia termasuk tenaga kerja, baik sebagai sasaran pembangunan maupun sebagai pelaku pembangunan. Balikpapan merupakan kawasan industri yang dimana di desa Karang Joang tersebut merupakan daerah yang sedang berkembang. Namun sejauh ini, kurangnya pendidikan dan belum ada tindakan yang nyata baik dari pemerintah maupun tokoh masyarakat dan pengusaha. Akibatnya kebanyakan orderan yang diminta oleh para pengembang beralih pada sekelompok orang saja. Berdasarkan kenyataan tersebut, maka lembaga pelatihan dan pengembangan produktifitas sumber daya manusia yang berlokasi di desa Karang Joang mencoba untuk memfasilitasi kelompok produktif ini agar bisa lebih produktif dan berguna bagi upaya memperbaiki ekonomi keluarga, salah satunya adalah dengan jalan memberikan pelatihan tentang manajemen dan repair ban layak pakai.

Analisis Variasi Arus Pengelasan Kombinasi SMAW-FCAW dengan Kampuh Double V-Groove terhadap Kekerasan dan Struktur Mikro Dissimilar Material JIS G3101-SS400 dan ASTM A36 Awali, Jatmoko; Rudiyanto, Fahmi; Thesalonicha, Somalinggi; Lubis, Muthia Putri Darsini; Tanjung, Rifqi Aulia; Triana, Yunita
Jurnal Rekayasa Mesin Vol 12, No 2 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.02.19

This study aims to determine the effect of variations of the current with combining two welding techniques SMAW and FCAW in double v-groove against the hardness and microstructure of the dissimilar material of JIS G3101-SS400 and ASTM A36. JIS G3101 SS400 and ASTM A36 each with a thickness of 10 mm were used as the materials. The combination of SMAW welding with E7018 electrodes and FCAW with E71T-1 were used as the welding techniques. The current used in SMAW welding were 60 A, 75 A, and 90 A. While in FCAW welding the current used were 190 A, 205 A, and 220 A. Hardness and microstructure tests were carried out on each sample. The results of the study showed that the current in welding process affect the hardness value and microstructure of material. The higher the welding current, the value of hardness of the material going to decrease and vice versa. The highest hardness values in SMAW and FCAW welding are at currents of 60 A and 190 A. Then the current in the welding process also affect the microstructure produced in the weld and HAZ. The formed microstructure containing pearlite and ferrite. The higher welding current, the percentage of pearlite produced increase and the percentage of ferrite decrease.

ANALISIS PENGARUH VARIASI ARAH PENGELASAN HARDFACING TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO PADA BAJA ASTM A36 Awali, Jatmoko; Maulana, M. Arzil; Rohimsyah, Fikan Mubarok; Triana, Yunita
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1507

Welding is a metal joining process with filler or without filler. The welding method is also used to thicken the surface of the material or hardfacing. Hardfacing is a welding process with the aim of improving mechanical properties and is used on worn components by using SMAW welding, SMAW welding is used because it is relatively inexpensive and flexible. The purpose of this study was to determine the effect of hardfacing with SMAW welding direction variations on the tensile strength and microstructure of ASTM A36 steel material. The welding directions are horizontal, vertical and diagonal. This study used ASTM A 36 steel with a thickness of 5 mm. The welding electrode was E7018 with a diameter of 3.2 mm and a current of 130 A. After conducting this research, the highest average tensile strength value was found in the vertical direction, which was 474.74 N/mm2. The average value of the tensile strength in the diagonal direction is 446.715 N/mm2. The average horizontal tensile strength value is 420.785 N/mm2.

APLIKASI TEKNOLOGI FILTER AIR DARI LIMBAH RUMAH TANGGA DI KAWASAN TRANSAD KM 8 KELURAHAN KARANG JOANG BALIKPAPAN UTARA Triana, Yunita; Dewanto, Hizkia Alpha; Laksono, Andromeda Dwi; Miles, Austin; Marippi, Alan; Lesmana, Muhammad Zidan; Rungsa, Yudianto; Batatta, Denada Yudhistira; Fadhilah, Hana’; Azhary, Kartika Nerissa; Ali, Shodikin; Ismail, Andi Idhil
PIKAT Jurnal Pengabdian Kepada Masyarakat ITK Vol. 5 No. 2 (2024): PIKAT : Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Institut Teknologi Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/pikat.v5i2.1200

Kelurahan Karang Joang merupakan salah satu kelurahan yang berada di Kecamatan Balikpapan Utara dengan luas wilayah 93.09 km2, dengan jumlah penduduk sebanyak 31.276 jiwa. Salah satu daerah kelurahan Karang Joang adalah Jl. Kesatriaan (Transad) KM. 8. Salah satu permasalahan di kawasan Transad adalah air sumur bor yang berbau dan tinggi akan kandungan zat besi dan juga banyaknya limbah dari perkebunan kelapa sawit milik warga. Untuk mengatasi permasalahan tentang air sumur bor yang berbau dan limbah kelapa sawit yang dapat mencemari lingkungan ini, maka dilakukan pembuatan teknologi filter air dengan memanfaatkan limbah kelapa sawit berupa cangkang dan serabut kelapa sebagai media filter dan menggunakan limbah rumah tangga berupa galon bekas sebagai wadah teknologi filter air dengan melalui beberapa tahap. Pada tahap persiapan dilakukan dengan melakukan survey dan observasi ke kawasan Transad KM.8 Karang Joang. Pada tahap pelaksanaan dilakukan dengan beberapa kegiatan seperti mempersiapkan alat dan bahan, pelaksanaan dilakukan beberapa kegiatan seperti mempersiapkan alat dan bahan, pelaksanaan tahapan pembuatan teknologi filter air dan melakukan sosialisasi terkait pemanfaatan kegunaan bahan dan cara kerja Filter air. Terakhir, tahap evaluasi dengan melakukan pemantauan secara berkala dan pemeriksaan visual komponen filter air selama 4 minggu. Adapun pengujian kandungan kadar besi hasil filter air ini, yaitu sebesar 0,5 mg.

Penambahan Ekstrak Ranting Karamunting (Rhodomyrtus Temenosa) Sebagai Inhibitor Alami Pada Baja AISI 1040 Yanti, Lisda; Darma, Daffa Irsyad; Rifani, Muhammad; Tajalla, Gusti Umindya Nur; Awali, Jatmoko; Mohd, Yusairie; Triana, Yunita
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.925

In this study, Karamunting twig extract (Rhodomystus tementosa) was used as a natural inhibitor on AISI 1040 steel. Based on the results of functional group analysis, it was confirmed that the compounds found in Karamunting twig extract are tannins and flavonoids. Electrochemical analysis using the potentiodynamic method showed the lowest corrosion rate at 300 ppm inhibitor concentration, with a corrosion rate of 2.881 mm/yr with an inhibition efficiency of 76.732%. Furthermore, the EIS test showed the highest inhibition efficiency at a concentration of 300 ppm, with a value of 66.720%.

Studi Pengaruh Temperatur Kalsinasi dalam Pembentukan Nanomagnetite dengan Metode Green Synthesis Ekstrak Daun Nanas Putra Parmita, Ade Wahyu Yusariarta; Panji; Dewanto, Hizkia Alpha; Sasongko, Ashadi; Qulub, Fitriyatul; Triana, Yunita; Parmita, Ade Wahyu Yusariarta Putra
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.940

In synthesizing Fe3O4 nanoparticles using the green synthesis method by adding FeCl3.6H2O and pineapple leaf extract. Pineapple leaf extract is used as a natural reducing agent which contains hydroxyl and carbonyl, which acts as a reducing agent for the synthesized FeCl3.6H2O. Then after the precipitate is obtained, calcination will be carried out, where the calcination temperature in the synthesis becomes a factor in forming Fe3O4 nanoparticles. Different calcination temperatures of 400°C, 450°C, and 500°C were given to prepare Fe3O4 nanoparticles, with the XRD test results confirming that Fe3O4 nanoparticles were formed. In the SEM-EDX test, the optimum variation is 400°C because the average particle size is 150.23 nm with irregular particle shapes. Then proceed with the SAA results with a surface area of 60.125 m²/g. Nanomagnetite produced by green synthesis of pineapple leaf extract can be used as a removal dyes.

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