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All Journal Jurnal Mechanical Turbo : Jurnal Program Studi Teknik Mesin JTERA (Jurnal Teknologi Rekayasa) Jurnal Teknologi Terapan Infotekmesin Abdimasku : Jurnal Pengabdian Masyarakat Prosiding Konferensi Nasional PKM-CSR Industrial Research Workshop and National Seminar Journal of Applied Mechanical Engineering and Renewable Energy (JAMERE) Jurnal Pengabdian kepada Masyarakat (Nadimas) Jurnal Sains, Teknologi dan Kesehatan Jurnal Polimesin Metalik: Jurnal Manufaktur, Energi, Material Teknik
Haris, Emin
Politeknik Negeri Indramayu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Effect of anode–cathode distance and anodizing time on hardcoat anodizing of AA7075 Endramawan, Tito; Haris, Emin; Rohmat, Yusup Nur; Irawan, Candra
Jurnal Polimesin Vol 24, No 1 (2026): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i1.6194

Abstract

Fishing activities in Indramayu ( a seaside city in West Java) typically use boats powered by propellers. These propellers often strike floating objects, resulting in damage such as cracked or broken blades. A survey revealed that the fractures are mainly caused by the poor quality of propellers produced using the gravity casting technique, which results in rough surfaces with pores and cracks that initiate during finishing. Therefore, surface repair is necessary, and one potential method is hardcoat anodizing. This study aims to investigate the effect of coating time and anode–cathode distance on the hardness of the oxide layer formed during the hardcoat anodizing process of AA7075 aluminum alloy. The anode–cathode distances were 5 cm, 10 cm, and 15 cm, with coating times of 40, 50, and 60 minutes. The process was conducted at 2 to 3°C, with a current of 5.12 A and a voltage of 31.5 V. The results of micro-Vickers hardness testing, conducted with a loading parameter of 200 gf and an indentation time of 15 seconds, indicated a hardness increase of 256% compared to the base material. The highest hardness value was achieved at a distance of 5 cm and a coating time of 60 minutes, measuring 322.9 VHN, with a resulting layer thickness of 67.16 µm.
PERANCANGAN BIOGAS MODEL LANDFILL GAS SEBAGAI BAHAN BAKAR ALTERNATIF yusup Nur Rohmat; Sukroni Sukroni; Emin Haris; Tito Endramawan; Muhammad Andrian
EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan Vol. 1 No. 3 (2024): EMPIRIS : Jurnal Sains, Teknologi dan Kesehatan, September 2024
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/1jvqzy72

Abstract

The use of cooking fuel, both in businesses and households, is essential, especially given the lack of alternatives to LPG following the fuel transition. The rise in global oil prices due to fuel shortages has become a global issue. Biogas, produced through the anaerobic fermentation of organic waste by bacteria, generates methane gas that can be utilized as an alternative energy source. Therefore, a landfill gas model biogas machine was designed to convert organic waste, such as cow manure and tofu liquid waste, into alternative fuel. The machine is equipped with a microcontroller system for automatic valve operation and gas pressure monitoring. Static load simulation on the machine frame using SolidWorks software showed that the maximum stress experienced was 10.4 x 10^6 N/m², well below the material's yield strength of 203.9 x 10^6 N/m², indicating safety. The displacement simulation on the machine frame ranged between 0.1–0.2 mm in the loaded areas, and the resulting factor of safety (FOS) was 19.5, signifying a highly safe design (FOS > 1).
Co-Authors Abdul Rakhman Abdul Rohmat Abu Rizal Al Gifari Adi Kusmayadi Agus Hidayat Agus Sifa Agus Sifa Agus Sifa Ahmad Farhan, Ahmad Arsanto Wibowo Arsanto Wibowo Arsanto Wibowo, Arsanto Wibowo Badruzzaman Badruzzaman Candra Irawan Candra Irawan Casiman Sukardi Ceba Muhamad Ar-Rasyid Chatarina Umbul Wahyuni Delffika Canra Delffika Canra Delffika Canra Endramawan, Tito Felix Dionisius Fitriani Fitriani Hariri, Eri Hasan Kurniawan B. N Kurniawan B.N. Leo Van Gunawan Luqmanbahy Luqmanbahy Meri Rahmi Mohammad Azwar Amat Muhamad Ghozali, Muhamad Muhammad Andrian Nur Rohmat, Yusup Pradhana, Claudha Alba Prinka, Yuliana Puger Satya Andika Rachmatullah Rachmatullah Rahmi, Meri Satria Jati, Unggul Satya Andika, Puger Sukardi, Casiman Sukroni Sukroni Sukroni Sukroni, Sukroni Suliono Suliono Syaifurrahman, Arief Tito Endrawan Unggul Satria Jati Yuliana Prinka