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All Journal Jurnal Teknik ITS The Journal of Experimental Life Sciences (JELS) IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Journal of Engineering and Technological Sciences International Conference on Coastal and Delta Areas Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Adi Widya : Jurnal Pengabdian Masyarakat IJOCE (International Journal of Offshore and Coastal Engineering) Jurnal Purifikasi International Journal of Marine Engineering Innovation and Research Jurnal Kadesi : Jurnal Teologi dan Pendidikan Agama Kristen Jurnal Pengabdian Pada Masyarakat Sewagati
Herman Pratikno, Herman
Institut Teknologi Sepuluh Nopember
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Effect of Preheating Process and V Groove Type on the Tensile and Metallography Test of ASTM A53 with A36 Weld Joint Using FCAW Method Herman Pratikno; Wimala Lalitya Dhanista; Abdullah Husin Baredwan
International Journal of Offshore and Coastal Engineering Vol. 6 No. 2 (2022)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i2.14769

Abstract

Steel is a metal material that is often used in the maritime industry due to its availability and weldability. ASTM A53 steel is a low carbon steel commonly used for piping applications. ASTM A36 steel is a low carbon steel commonly used for offshore buildings. This study aims to determine the influence of preheat temperature and V groove type on bend resistance of A53 and A36 weld joint using FCAW (Flux Cored Arc Welding) method. The preheat temperature used are 100°C and 150°C with groove type variations used were single V groove and double V groove. The type of protective gas used is 100% CO2. The results of tensile strength test showed that in the welding process in this study, specimen with preheat temperature of 150°C and double V-Groove shape has the strongest tensile strength, with HAZ width of 3.91 mm, ferrite phase percentage of 58.08%, and pearlite phase percentage of 41.92%.
The Effect of Addition of Mangrove Avicennia Marina Extract on The Biofouling Activity to Epoxy Coating Herman Pratikno; Dwi Maharani Aisyah; Harmin Sulistiyaning Titah
International Journal of Offshore and Coastal Engineering Vol. 6 No. 2 (2022)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i2.15609

Abstract

Biofouling is one of the problems related to construction maintenance in industrial developments in the maritime construction sector because biofouling adhesion can affect construction productivity. This problem can be overcome by coating using natural-based paints to reduce the ecological impact that will occur. This study aims to determine the effect of the addition of Avicennia marina mangrove extract as an anti-fouling compound mixed with epoxy paint. This research was conducted by mixing Avicennia marina mangrove extract with epoxy paint. Then the alloy is applied as a coating on the ASTM A36 steel specimen. Furthermore, the test was carried out by immersing the specimen in a solution containing Littorina littorea as a biofouling biota. The average results of the biofouling affixing activity test with the addition of mangrove extract concentrations of 0%, 10%, 20%, and 30% were respectively 24.0 gr, 20.5 gr, 13.5 gr, and 6 gr. This test shows that the more the addition of mangrove extracts, the smaller the adhering activity of biofouling to the specimen.
Analysis of Abrasive Materials dan Air Pressure Variations for Thermal Spray Aluminum Coating on Adhesion Strength and Corrosion Resistance in Seawater Environment Herman Pratikno; Raymond Danielle Mulya; Wimala Lalitya Dhanistha
International Journal of Offshore and Coastal Engineering Vol. 9 No. 1 (2025)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j225800914.v9i1.4467

Abstract

Marine structures must withstand the marine environment for a certain design life. However, corrosion causes a decrease in structural integrity before reaching the design life. Thermal spray aluminum coating becomes a protection method because of its resistance to corrosion in the long term. This study analyzed the effect of variations in abrasive materials and air pressure on thermal spray aluminum coating on ASTM A36 steel. The steel material will be blasted with two types of abrasive materials, namely garnet and aluminum oxide, then coated using the electric arc wire spray method at pressures of 2.5 bar, 3.5 bar, and 4.5 bar. Testing was carried out using the pull-off adhesion test and the three-electrode cell method. The results showed that the highest adhesion strength of 12.2 MPa occurred at 4.5 bar aluminum oxide, while the lowest was 6.3 MPa at 2.5 bar garnet. The lowest corrosion rate of 0.001 mm/year was obtained at 4.5 bar garnet, and the highest was 0.101 mm/year at 2.5 bar aluminum oxide. Based on the results of the corrosion rate test, it can be concluded that the increase in pressure is directly proportional to the increase in coating performance in resisting corrosion. Conversely, the increase in surface roughness is inversely proportional to the coating performance in resisting corrosion.
Co-Authors Abdullah Husin Baredwan Agung Purniawan Andrea Novia Samiyono Andry Febrianto Ardi Prasetia Yanuar Arifin Amanto Putra Asta Razqi Damarjati Atha Fazadima Atiek Moesriati Atiek Moesriati Bayu Mahardika Bima Satriya Willy Harsa Bintang Respati Dwi Harnani Carolus Trijatmiko Nugroho Dienullah, R Mohammad Alghaf Dirta Marina Chamelia Dwa Desa Warnana Dwi Maharani Aisyah Dwi Purnomo H, Zuhud Ubaidillah & Miftakh D.S Faruq Abdullah Febrian Ramadhana Sastradimaja Felita Widya Hapsari Frestiqauli, Santi Gilang Rezha Mahardika Hafizh Abiyyuda Hafizh Abiyyuda Handaningtyas, Inggrid Handayanu Handayanu Handayanu Handayanu Harmin Sulistyaning Titah Harmin Sulistyaning Titah Hasan Ikhwani Hasan Ikhwani Hasan Ikhwani Hasan Ikhwani Ikhwani, Hasan Inastika Nabilah Inaya Krista Pradyptia Ipung Fitri Purwanti Kusumaningrum, Ajeng Wardhani Lila Yuwana Madi Madi Madi Mahmud Mustain Mahmud Mustain Maria Anityasari Miftakh D.S, Dwi Purnomo H, Zuhud Ubaidillah & Moch. Zaed Yuliadi Muhammad Fauzul Imron Muhammad Ichsan Rosidin Yuniarto Muhammad Makki Romadhoni muhammad Rizkqy Jafa Muhammad Rizqy Jafa Muhammad Sultanul Azdkar Muhammad Zikra Mukhtasor Mukhtasor Nabila, Debby Dea Naifah, Sonia Ratnaduhita Nurani Nugraha Adhi Pahlawan Nur Syahroni Pandu Damay Putra Pratikto, Agoes Putera, Rizky Islami Putra, Riyan Afnanda Rahmadhani Tasya Rahman Rahmaningtyas, Ivana Rashida, Ailsa Dahayu Ray Adam Baihaqi Raymond Danielle Mulya Raymond Habinsaran Aruan Rizkiyah Ramadani Rizky Islami Putera Rizky Islami Putera Rochani, Imam Rudi Walujo Prastianto Rudi Walujo Prastianto Safira Dwi Anggraeni SALMAN FARIS Shade Rahmawati Sholihin Sholihin Sholihin Suef, Mokhammad Suparno Suparno SUTIKNO Taufik Fajar Nugroho Tin Rachmatullah Tin Rachmatullah Titah, Harmin Sulistiyaning Titah, Harmin Sulistiyaning Wardhani, Widhowati Kesoema Wimala Lalitya Dhanista Wimala Lalitya Dhanista Wimala Lalitya Dhanistha Wimala Lalitya Dhanistha Wiscahyo, Gelar Wisnu Wardhana Yani, Beta Fitri Yoyok Setyo H Yoyok Setyo Hadiwidodo Yoyok Setyo Hadiwidodo Yudha Prasetyawan Yudha Prasetyawan Yudiardana Tridantoko Susarno