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All Journal Jurnal Pendidikan Teknik Mesin Undiksha International Journal of Applied Technology Research TECHNOLOGIC Community Service Journal : Jurnal Pengabdian Masyarakat Mardira
Januar Nur Rohmah Suprihartini
Politeknik Negeri Indramayu
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Application of Organic Inhibitors to the Corrosion of Materials AISI 1070 Steel Destri Muliastri; Devi Eka Septiyani; Naufal Afif; Vania Tingting Sirenden; Januar Nur Rohmah Suprihartini
Jurnal Internasional Penelitian Teknologi Terapan Vol 2 No 1 (2021): April 2021
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v2i1.39

Abstract

AISI 1070 steel is a material that has corrosion when it reacts with the environment. One way to inhibit the corrosion rate is by using organic inhibitors. The organic inhibitors used mango leaves and mango rinds with variations in the concentration of organic inhibitors of 0%, 6%, and 8%, respectively. This study aimed to determine the effectiveness of mango leaf extract and mango rinds as an inhibitor against the corrosion rate of AISI 1070 Steel. The extraction was carried out using the Maceration Method. Fourier Transform Infrared (FTIR), Potenzyodinamic, and Weight Loss tests were carried out in this study. FTIR results show that both mango rinds and mango leaf have ingredients that were able to inhibit the corrosion rate, such as flavonoid functional groups including C – H, C = O, and C – O. Using the weight-loss method, the best corrosion rate was found in the mango rinds extract with a concentration of 8 mL, which was 31.784 mm/year with an inhibition efficiency of 92%. The highest corrosion rate was in 2M H2SO4 solution using potentiodynamic, without a mixture of inhibitors, that is 0.15589478 mm/year.
RANCANG BANGUN FIXTURE UNTUK MENINGKATKAN KAPASITAS PRODUKSI PROSES SPRUE CUTTING PADA AXLE BRACKET DI PT. XYZ Stenli Octavian Eridheni; Suprihartini, Januar Nur Rohmah; Joko Wibowo, Yohanes Tri
Technologic Vol 16 No 2 (2025): TECHNOLOGIC
Publisher : LPPM Politeknik Astra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52453/technologic.v16i2.500

Abstract

PT. XYZ merupakan perusahaan manufaktur yang memproduksi komponen otomotif berbahan dasar aluminium casting dengan produk utama berupa piston untuk mesin kendaraan bermotor. Dalam rangka diversifikasi produk, perusahaan bekerja sama dengan mitra industri untuk memproduksi axle bracket yang berfungsi sebagai dudukan suspensi dan master rem pada sepeda motor. Proses sprue cutting pada komponen ini masih dilakukan secara manual karena fixture yang tersedia hanya dirancang untuk model piston, sehingga waktu siklus pemotongan tinggi dan kapasitas produksi tidak mampu memenuhi permintaan pelanggan. Penelitian ini bertujuan untuk merancang dan membuat fixture khusus yang dapat meningkatkan efisiensi proses sprue cutting axle bracket. Metode penelitian meliputi pengumpulan data, analisis permasalahan menggunakan fishbone diagram, perancangan dan pembuatan fixture, serta uji performa melalui pengukuran waktu siklus dan kualitas hasil pemotongan. Hasil uji coba menunjukkan bahwa fixture baru mampu menurunkan waktu siklus dari 110 detik menjadi 85 detik dan meningkatkan kapasitas produksi sebesar 28%, serta mengurangi cacat produk. Dengan demikian, fixture yang dikembangkan terbukti meningkatkan produktivitas, stabilitas proses, dan kualitas pemotongan pada produksi axle bracket.
Enhancing Integrated Competencies in Vocational Students Through Mechanical and Software Engineering Collaboration in the Era of Industry 4.0 Stenli Octavian Eridheni; Januar Nur Rohmah Suprihartini; Systi Adi Rachmawati
Community Service Journal : Jurnal Pengabdian Masyarakat Mardira Vol. 1 No. 2 (2025): Community Service in Indonesia
Publisher : Politeknik Mardira Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71266/csj.v1i2.76

Abstract

The rapid development of digital technology in the era of Industry 4.0 demands multidisciplinary collaboration competence, especially between Mechanical Engineering and Software Engineering students in vocational education. However, the gap in digital literacy and automation skills among students still persists due to sectoral curricula, limited facilities, and minimal involvement of industry. This community service program aims to optimize interdisciplinary collaboration through technology-based knowledge transfer for vocational school students. The method consists of needs identification, coordination with partners, material preparation, training implementation, and evaluation. The activity was held at SMK PGRI Kandanghaur Indramayu, focusing on the introduction of programming, digital-based system modelling, and data presentation tools used in industrial environments. The results indicate increased students’ understanding of digital integration in mechanical systems and stronger motivation to pursue careers aligned with technological development. This initiative encourages the readiness of vocational education graduates to contribute to the transition toward Industry 4.0.
Analisis Performa Filtrasi Commercial PP-Melt-blown Electrospun Nanofiber Nylon-6 pada Udara Perkotaan Indonesia: Filtration Perfomance of Commercial PP Melt-blown Modified with Electrospun Nylon-6 Nanofiber for Indonesia Urban Air Januar Nur Rohmah Suprihartini; Stenli Oktavian Eridheni; Systi Adi Rachmawati
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 14 No. 1 (2026)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v14i1.112577

Abstract

Masker N-95 yang selama ini menjadi andalan perlindungan pernapasan ternyata menyimpan keterbatasan. Lapisan serat-mikro polypropylene (PP) yang menjadi bahan utamanya dinilai belum cukup efektif dalam menangkap partikel-partikel berbahaya berukuran sangat kecil, sekaligus memiliki sifat mekanik yang masih perlu ditingkatkan. Berangkat dari tantangan tersebut, penelitian ini menghadirkan pendekatan inovatif dengan memodifikasi lapisan commercial PP melt-blown menggunakan nanofiber Nylon-6 yang difabrikasi melalui metode electrospinning. Membran non-woven yang dihasilkan kemudian dikarakterisasi secara menyeluruh mulai dari analisa sifat fisik hingga evaluasi kinerja filtrasi menggunakan Particulate Filtration Efficiency (PFE). Modifikasi PP melt-blown dengan nanofiber Nylon-6 terbukti mampu meningkatkan kinerja filtrasi secara signifikan, dengan nilai PFE terhadap PM0.3 yang berhasil melampaui angka 95%, didukung pula oleh nilai quality factor yang memuaskan. Capaian ini membuka harapan baru bahwa material komposit tersebut berpotensi menjadi solusi nyata dalam pengembangan masker N-95 yang lebih andal dan efektif untuk melindungi kesehatan masyarakat. The N95 mask, long regarded as a reliable frontline of respiratory protection, turns out to carry its own limitations. The microporous polypropylene (PP) fiber layer that forms its core material has been considered insufficiently effective at capturing extremely small hazardous particles and exhibits mechanical properties that still leave room for improvement. To address this challenge, the present study introduces an innovative approach by modifying a commercial PP melt-blown layer with Nylon-6 nanofibers fabricated via electrospinning. The resulting non-woven membrane was then comprehensively characterized, ranging from physical property analysis to filtration performance evaluation using Particulate Filtration Efficiency (PFE). Modification of PP melt-blown with Nylon-6 nanofibers significantly enhanced filtration performance, with PFE values against PM0.3 exceeding 95%, further supported by a satisfactory quality factor. This achievement offers renewed hope that the composite material has strong potential as a viable solution for developing a more reliable and effective N95 mask to safeguard public health.
Co-Authors Destri Muliastri Devi Eka Septiyani Arifin Naufal Afif Stenli Octavian Eridheni Stenli Oktavian Eridheni Systi Adi Rachmawati Tri Joko Wibowo, Yohanes Vania Tingting Sirenden