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All Journal Rekayasa Mesin Sinergi Jurnal Ilmiah Teknik Mesin Journal of Mechanical Engineering Science and Technology Jurnal Teknik Mesin (JTM) Jurnal Surya Masyarakat DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) JPKMI (Jurnal Pengabdian Kepada Masyarakat Indonesia) Jurnal Surya Masyarakat International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Pengabdian pada Masyarakat Ilmu Pengetahuan dan Teknologi Terintegrasi Dulang: Jurnal Pengabdian Kepada Masyarakat Jurnal Gear : Energi, Perancangan, Manufaktur & Material Jurnal Polimesin
Rudianto Raharjo
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Religion Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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The effect of different levels of cleanness of the pre-coat surface on adhesion and corrosion performance of A36 steel with epoxy coating Widodo, Teguh Dwi; Setyarini, Putu Hadi; Sugiarto, Sugiarto; Raharjo, Rudianto; Bintarto, Redi; Darmadi, Djarot Bangun; Sagita, Sagita
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.010

Abstract

Adhesion and corrosion protection are the main properties of epoxy coatings, especially when applied to materials exposed to harsh environments, such as chloride-containing water. However, the adhesion and corrosion protection of coatings are affected by surface preparation, especially the cleanliness of the substrate surface prior to coating application. Choosing the proper surface preparation can optimize the coating's capabilities. This research aims to evaluate the Effect of blasting process cleanliness on coating performance on the steel surface. The novel approach is to correlate NACE surface cleanliness standards with coating performance. In this study, A36 steel is used. The cleaning procedure uses an air-blasting process with an 8-bar nozzle pressure and at least 5 minutes of spraying time to meet the desired National Association of Corrosion Engineers (NACE) standard. The abrasive utilizing garnet with a mesh of 30-40. Meanwhile, coating is performed at room temperature using the airless spray method with a 90° angle, a distance of 25 cm from the substrate and the nozzle, and a nozzle speed of 300 mm/s. The gap in the coating process between the first and second layers is 24 hours. The results showed that surface preparation influenced the coating's pullout strength and corrosion performance. The pullout strength test demonstrated that NACE 2 provided the highest pullout strength. Likewise, corrosion rate testing showed that surface preparation affects the corrosion rate, with NACE 1 providing the lowest corrosion rate (the best corrosion protection). 
Bio-hybrid carbon fibre/OPFF epoxy composites: mechanical, interfacial, and thermal performance Randis, Randis; Hermansyah, Hadi; Syahruddin, Syahruddin; Achmad, Karmila; Yusrina, Yasmin Zulfati; Samosir, Devina Sanchia; Wibowo, Edi; Raharjo, Rudianto
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8587

Abstract

The development of sustainable lightweight composites with reliable structural integrity is important for transportation and construction applications. This study investigates a bio-hybrid sandwich composite comprising carbon fibre skins and Oil Palm Frond Fibre (OPFF) as a natural porous core, with emphasis on improving interfacial integrity through chemical modification. The primary objective is to evaluate the effectiveness of sequential NaOH and H₂O₂ treatment in enhancing mechanical performance, interfacial bonding, and thermal stability of the composite system. Hybrid composites were fabricated using an epoxy matrix, combining carbon fibre reinforcements with untreated and chemically treated OPFF cores in various fibre configurations. Mechanical properties were assessed under tensile, flexural, and impact loading, while interfacial morphology and thermal behaviour were examined using microscopy and thermal analysis. The results demonstrate that NaOH + H₂O₂ treatment improves composite performance, with treated unidirectional hybrids exhibiting the highest tensile and flexural strengths. Microscopic observations reveal a substantial reduction in fibre pull-out, debonding, and skin–core delamination, indicating enhanced interfacial integrity and more efficient load transfer. In addition, treated composites show improved thermal stability. The novelty of this work lies in demonstrating that chemically treated OPFF can function as a sustainable sandwich core, where improved interfacial bonding plays a decisive role in suppressing delamination and enhancing overall composite performance.
Penerapan Modern Farm untuk Menunjang Higienitas dan Kemadirian Pangan di Pondok Pesantren Darul Mutaqin Kota Batu Teguh Dwi Widodo; Dwi Kristanto; Arief Budi Nugroho; Lilis Yuliati; Redi Bintarto; Rudianto Raharjo
Jurnal Surya Masyarakat Vol 7, No 1 (2024): November 2024
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jsm.7.1.2024.60-65

Abstract

One of the important contributions from the academic community of Brawijaya University is the empowerment of students in the boarding school setting. A range of empowerment programs have been adopted, encompassing the enhancement of traditional beverage production tools and workshop tools, as well as the introduction of handicraft innovations to augment income. The economy of the students and members of the Darul Mutaqin Islamic boarding school in Dau Village, Batu City, primarily relies on donations, supplemented by revenue generated from the sale of herbal goods. The school is strategically located next to rice fields, which offer ample natural resources. Food self-sufficiency can be achieved by utilizing animal husbandry techniques that involve feeding animals with nutritious green feed derived from agricultural waste, such as water hyacinth and maize stalks. This approach holds significant promise. Presently, the livestock industry at Darul Mutaqin Islamic Boarding School, namely in poultry farming, remains underdeveloped despite the ample availability of natural resources. Poultry farming, a generally manageable approach, might suffer a decrease in economic profitability if not adequately planned. The implementation of suitable technology via the Doktor Mengabdi initiative is anticipated to enhance students' proficiency in animal husbandry, augment livestock yield, and uphold environmental well-being. Darul Mutaqin's future goals include attaining financial self-sufficiency. This effort offers solutions by implementing a cutting-edge pilot project for a contemporary livestock system that integrates diverse mechanization and automation technology. The purpose of these suitable technologies is to generate sustainable poultry products, hence benefiting the pesantren community.
Co-Authors Abdullah, Harnan Malik Agus Budiarto Ahdiyat, Ayi Akhmad Akbar Triatmojo, Kurnia Anindito Purnowidodo Anindito, Baghdad Daiva Alkautsar Ardiansyah Darmawan, Mohamad Ari Wahjudi Arif Wahyudiono Arman, Rifqi Azhar, Andika Aziz, Muhammad Ibrahim Bayu Rahayudi D, Dhimas Kaukabi Darmadi, Djarot Bangun Dewi, Francisca Gayuh Utami Dwi H Sulistyarini Dwi Kristanto Dwi Kristanto Edi Wibowo Erwin Sulistyo Fadilah, Risky Femiana Gapsari MF Fikrul Akbar Alamsyah Firas, Alfian Gayuh Utami Dewi, Francisca Habibulfalah, Endi Hadi Hermansyah, Hadi Hidayat , Wahyu Ihin Solihin Karmila Achmad Kelvin, Michael Kusumaningsih, Haslinda Laila Sari, Shintya Lilis Yuliati Ma’arif, Moh. Syamsul Machfudlon, Muhammad Ali Maftuch Maftuch Masykur , M Alfin Mega Nur Sasongko Moch. Syamsul Ma'arif Musyaffa' Ma'shum, Yafi' Nugroho, Arief Budi Nur M. F. Dinia Nurkholis Hamidi Prasetyo Pangestu, Andika Pratama, Gesha Denny Pratiwi, Erika Ramadani Prayudi , Makrusy Eko Pribadi , Aries Fajar Purnama, Alyasa Huda Putri, Debri Harynia Putu Hadi Setyarini Qoid A Fadhlurrahman Randis Randis Redi Bintarto Redi Bintarto, Redi Runi Asmaranto Safa S Istafada Sagita, Sagita Samosir, Devina Sanchia Saputra, Muhamad Hendra Setiawan, Yustiza Rahadian Siswoyo, Redi Cipto Slamet Thohari Sugiarto S Sugiono Sugiono Suwarso, Wahyu Handoyo Syahruddin Syahruddin Tamtomo, Bagas Teguh Dwi Widodo Wahyudiansyah, Adly Wibisono, Aryasatya Rafli Yusrina, Yasmin Zulfati