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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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Analyzing the Effect of Variation in Shielding Gas Flow Rate and V Groove Type Towards Tensile and Metallographic Testing of GMAW Weld Joint of ASTM A53 and A36 Herman Pratikno; Wimala Lalitya Dhanistha; Andrea Novia Samiyono
International Journal of Offshore and Coastal Engineering Vol. 4 No. 1 (2020)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i1.8706

Abstract

Steel is a metal that commonly used in fabrication, engineering, and reparation activities in the structure construction industry. ASTM A53 steel is a low carbon steel with 0.25% to 0.3% of carbon content so it has a high weldability. ASTM A36 steel is a low carbon steel with carbon content of 0.25% to 0.29% and is often used in the floating building industry. This study aims to determine the effect of shielding gas flow rate and V-groove type to the tensile strength of A53 steel welded with A36 steel by Gas Metal Arc Welding (GMAW) method. The shielding gas level used is 100% CO2 with flow rate variations, including 15 liters/minute, 20 liters/minute, and 25 liters/minute. The groove types used are Single V-Groove and Double V-Groove. Tensile strength test result showed that in the welding process in this study, specimen with 25 liters/minute flow rate on the Double V-Groove had the highest tensile strength value of 516.73 MPa, with the narrowest HAZ width of 0,87 mm on A36’s HAZ and 1,22 mm on A53’s HAZ, and the smallest percentage of ferrite in the microstructure as much as 56.34% and 43.66% pearlite.
The Effect Analysis of Coating Thickness Variation and Mixed Composition of Zinc - Graphite on Epoxy Coating with Steel Plate ASTM A36 Herman Pratikno; Wimala Lalitya Dhanistha; Andry Febrianto
International Journal of Offshore and Coastal Engineering Vol. 4 No. 1 (2020)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i1.8707

Abstract

Analysis of Influence of Abrasive Material Variation and Spray Pressure Variation in Coating Epoxy of Astm A36 Steel Toward Impact Resistance and Corrosion Rate Herman Pratikno; Bima Satriya Willy Harsa; Sholihin Sholihin
International Journal of Offshore and Coastal Engineering Vol. 4 No. 2 (2020)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i2.9337

Abstract

Corrosion is a decrease in material quality caused by environmental influences. One of the methods commonly used to control corrosion is coating. In the coating process, the use of spray is the better method compared to roll and brush. Before coating is applied, the choice of abrasive material during the sand blasting process can determine the success of the coating. This research was conducted to analyze the effect of variations in abrasive material and spray pressure on the coating process of ASTM A36 steel material on its impact resistance, corrosion rate, and adhesion forces. Variation of abrasive material used were steel grit and silica. The spray pressure variations used were 2.5, 3.5, and 4.5 bar. The result of corrosion rate testing on variation with steel grit abrasive material and spray pressure of 4.5 bar has the lowest corrosion rate, with the value of 0.00124 mm/a. The highest adhesion strength test result of 9.07 MPa was obtained from variations with steel grit abrasive material and spray pressure of 4.5 bar. Impact test result using a variation with steel grit abrasive materials and a spray pressure of 4.5 bar yield the highest value, with the value of 2.287 joules.
The Effect Analysis of Coating Thickness Variation and Mixture Composition of Magnesium – Flake Glass on Epoxy Coating on Abrasive Resistance, Adhesion Strength, and Prediction of Corrosion Rate of ASTM A36 Steel Plate Herman Pratikno; Hasan Ikhwani; Yudiardana Tridantoko Susarno
International Journal of Offshore and Coastal Engineering Vol. 4 No. 2 (2020)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i2.9339

Abstract

Steel cannot be separated from the marine manufacturing industry. It is important to control the corrosion rate of steel used for offshore structures. The coating method can be used in mobilization areas and splash zones that have high corrosion rates due to sustained friction loads in the marine environment. The purpose of this study was to analyze the different in adhesion strength, abrasion resistance, and corrosion rate prediction of ASTM A36 low carbon steel plate with coating thickness variations of 300µm, 500µm, and 700µm and Magnesium Carbonate - Flake Glass mixture variations of 10%, 20%, and 30%. In the pull-off test, the highest value of adhesion strength was obtained from specimen with 300µm coating thickness and 10% Magnesium Carbonate - Flake Glass mixture with a value of 5.67 Mpa. The highest abrasion test value was obtained from specimen with 700µm coating thickness and 30% Magnesium Carbonate - Flake Glass mixture with a value of 0.91 Wear Cyces per Micrometer. Whereas in the three cells electrode test, the highest value was found at specimen with 700µm coating thickness and 30% Magnesium Carbonate - Flake Glass mixture with a value of 0,00010 mmpy.
Analysis of the Effect of Abrasive Material and Polyurethane Coating Thickness Variations on ASTM A36 Steel Towards Corrosion Rate in Sea Water Environment Herman Pratikno; Wimala Lalitya Dhanista; Felita Widya Hapsari
International Journal of Offshore and Coastal Engineering Vol. 5 No. 1 (2021)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i3.9953

Abstract

An unavoidable phenomenon of using steel as the main material in offshore structures and floating vessels is corrosion. One method of preventing corrosion is by coating and using polyurethane is one type of coating that is currently being developed in the maritime industry. But the success of this coating process is very dependent on the surface preparation process. The usual method used is blasting using an abrasive material. This study aims to find the response to the corrosion rate of polyurethane coating with thickness variations of 60 µm, 80 µm, and 100 µm by first blasting using abrasive material variations in the form of silica sand and steel grit. The result of the corrosion rate test showed that the lowest corrosion rate value was obtained in the variation of abrasive material in the form of steel grit. with a 100. µm of polyurethane coating thickness, that is 0,00008 mm/a. While the highest corrosion rate value was obtained in the variation of abrasive material in the form of silica sand with a 60 µm of polyurethane coating thickness, that is 0,02202 mm/a.
The Effect Analysis of Coating Thickness Variation and Mixture Composition of Magnesium – Flake Glass on Epoxy Coating on Abrasive Resistance, Adhesion Strength, and Prediction of Corrosion Rate of ASTM A36 Steel Plate Herman Pratikno; Hasan Ikhwani; Yudiardana Tridantoko Susarno
International Journal of Offshore and Coastal Engineering Vol. 5 No. 1 (2021)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i2.9956

Abstract

Steel cannot be separated from the marine manufacturing industry. It is important to control the corrosion rate of steel used for offshore structures. The coating method can be used in mobilization areas and splash zones that have high corrosion rates due to sustained friction loads in the marine environment. The purpose of this study was to analyze the different in adhesion strength, abrasion resistance, and corrosion rate prediction of ASTM A36 low carbon steel plate with coating thickness variations of 300µm, 500µm, and 700µm and Magnesium Carbonate - Flake Glass mixture variations of 10%, 20%, and 30%. In the pull-off test, the highest value of adhesion strength was obtained from specimen with 300µm coating thickness and 10% Magnesium Carbonate - Flake Glass mixture with a value of 5.67 Mpa. The highest abrasion test value was obtained from specimen with 700µm coating thickness and 30% Magnesium Carbonate - Flake Glass mixture with a value of 0.91 Wear Cyces per Micrometer. Whereas in the three cells electrode test, the highest value was found at specimen with 700µm coating thickness and 30% Magnesium Carbonate - Flake Glass mixture with a value of 0,00010 mmpy.
Comparative Analysis of FCAW, and GMAW Welding With Heat Input Variations on A36 Steel Against Vickers Hardness Test and Macrostructure Herman Pratikno; Wimala Lalitya Dhanista; Nugraha Adhi Pahlawan
International Journal of Offshore and Coastal Engineering Vol. 5 No. 2 (2021)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i4.10931

Abstract

In offshore building construction, a precise welding method is needed on A36 steel, where A36 steel is one of the main materials in the fabrication process of offshore buildings. In this study a comparison of the results of the welding GMAW and FCAW with variations of the heat input on the A36 steel to the Hardness test, and the macrostructure test and the selection of the most appropriate method based on the results of the mechanical test analysis. The heat input variations used are GMAW 1.50 kJ / mm and 2.03 kJ / mm while for FCAW 1.90 kJ / mm and 2.30 kJ / mm. The results of this study are the best hardness test results are the FCAW welding method with a heat input of 2.30 kJ / mm with an average ultimate strength of 149.06 HVN, in the macro test the results show that the greater the heat input, the wider the HAZ area, this is shown by welding FCAW heat input 2.30 kj / mm which has a HAZ width area of 20 mm.
Effect Analysis on Coating Methods and Corrosive Media Variations toward Adhesion Strength, Corrosion Rate, and Metallography of ASTM A36 Steel with Polyurethane Coating Herman Pratikno; Hasan Ikhwani; Inaya Krista Pradyptia
International Journal of Offshore and Coastal Engineering Vol. 5 No. 2 (2021)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2580-0914.v4i4.10933

Abstract

Corrosion can cause material damage due to the material’s reaction with the environment. Corrosion will affect materials on construction, including metal material, thereby reducing the strength and the construction life, especially in a corrosive environment. The most effective and economical corrosion control is coating. The right coating application method will result in good bonding of the paint with the material, so that the corrosion protection will be better. This research used the ASTM A36 carbon steel material and polyurethane coatings. The purpose of this study is to determine the adhesion strength and corrosion rate by varying the application methods, namely brush, roll, and spray. In the pull-off test, the highest value of adhesion strength was obtained in the spray coating method with an average value of 20,82 MPa. Whereas in the three-electrode cell testing, the lowest corrosion rate using NaCl corrosive media was found in the spray coating method with a value of 0.000025402 mmpy and the lowest corrosion rate using FeCl3 corrosive media was found in the spray coating method with a value of 0.00182 mmpy.
Effect Analysis of Post Heating Temperature Variation on Metallography and Bending Test of GMAW ASTM A53 Steel Weld Joint Herman Pratikno; Hasan Ikhwani; Muhammad Rizqy Jafa
International Journal of Offshore and Coastal Engineering Vol. 6 No. 1 (2022)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i1.14553

Abstract

ASTM A53 steel is medium carbon steel with 0.3% carbon content and is often used for pipe manufacturing. The purpose of this study was to determine the effect of post heating temperature variation on bending and metallography test on weld joint of ASTM A53 steel using the GMAW process. The electrode used is ER-70S-6. Post heating temperature variations are 250oC, 300oC and 350oC. The bending test result showed that welding with 350oC postheating temperature produce the smallest open defect value. The microstructure result showed that welding with 350oC post heating temperature produce the smallest pearlite percentage in three areas observed.
Comparative Analysis of GTAW, GMAW, and FCAW Welding Results on A36 Steel Against Tensile Test and Macrostructure Herman Pratikno; Wimala Lalitya Dhanista; Hafizh Abiyyuda
International Journal of Offshore and Coastal Engineering Vol. 6 No. 1 (2022)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v6i1.14555

Abstract

Offshore building construction is inseparable from the fabrication process. Fabrication process that has an important role in terms of engineering, material repair and welding process. In offshore building construction, a precise welding method is needed on A36, where A36 steel is one of the main materials in the fabrication process of offshore buildings. In this study a comparison of welding results of GTAW, GMAW, and FCAW on A36 steel against Tensile Test and Macrostructure Test. The results of this research show that the best tensile test results are the GTAW welding method with an average value of ultimate strength of 462,168 MPa. Macrostructure testing which has the widest HAZ width is the GTAW welding method of 18,71 mm.
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