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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Kimia (Journal of Chemistry) Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Sinergi Indonesian Journal of Science and Technology Jurnal Teknik Mesin SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi JURNAL INTEGRASI J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Buletin Ilmiah Sarjana Teknik Elektro Journal of Robotics and Control (JRC) Indonesian Journal of Computing, Engineering, and Design Journal of Integrated and Advanced Engineering (JIAE) AMMA : Jurnal Pengabdian Masyarakat Ambidextrous : Journal of Innovation, Efficiency and Technology in Organization
Yuli Panca Asmara
Universitas Islam Kalimantan Muhammad Arsyad Al Banjari Banjarmasin
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Other

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KARAKTERISTIK ARUS DAN POTENSIAL KATODIK PADA PERLINDUNGAN SISTEM ARUS TERPASANG TERHADAP STAINLESS STEEL TYPE 304 DI LINGKUNGAN AIR LAUT Yuli Panca Asmara
Jurnal Kimia (Journal of Chemistry) Vol. 1, No. 1 Januari 2007
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (867.215 KB)

Abstract

Cathodic protection basically reduces the corrosion rate of a metallic structure by reducing its corrosionpotential, bringing the metal closer to an immune state. So, to optimallize the protection, not only potential but alsoenvironment and system should be considered in designing cathodic protection. The changes of current provided by adirect current (DC) source should be a counted during the protection.The objective of this laboratory was to studed the polarization behaviour concerning 304 stainless steelimmersed in the artificial sweater based on ASTM D 1141 using potentiostat. This task was performed by recordingdata points (potential across a constant resistor) within a determined potential. Then, the surface morphology ofspecimen caused by polarisation potential was investigated using an optical microscope and SEM analysis.The current derived from the polarisation diagram by the determination of several points protectionpotential ranging from -730mV to -1100 mV tend to decrease. The sharp decrease of current occured at protectionpotential of -1100 mV (from 580 mA/m2to 450 mA/m2) there was a slight decrease at protection potential of -730mV. The decrease occurred was from 190 mA/m2 to 150 mA/m2. Potential of protection cathodic also influenced the free corrosion potential. At the protection potential of -730 mV, free corrosion potential was -225 mV, and was-450 mV at the protection potential of -1100mV.By visual examination it can be deduced that the decrease of current density occurred was caused by thegrowth of salt calcareous deposits. By SEM investigation it was indicated that the deposit was made of calcium andmagnesium as a result of the increase of pH during protection. The more detail analisys showed that this depositcreated local pitting corrosion and decreased pitting potential by 200 mV.
The Roles of H2S Gas in Behavior of Carbon Steel Corrosion in Oil and Gas Environment: A Review Yuli Panca Asmara
Jurnal Teknik Mesin Vol 7, No 1 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v7i1.2279

Abstract

Hydrogen sulfide (H2S) is the most dangerous element which exists in oil and gas reservoir. H2S acidifies water which causes pitting corrosion to carbon steel pipelines. Corrosion reaction will increase fast when it combines with oxygen and carbon dioxide (CO2). Thus, they can significantly reduce service life of transportation pipelines and processing facilities in oil and gas industries. Understanding corrosion mechanism of H2S is crucial to study since many severe deterioration of carbon steels pipelines found in oil and gas industries facilities. To investigate H2S corrosion accurately, it requires studying physical, electrical and chemical properties of the environment. This paper concentrates, especially, on carbon steel corrosion caused by H2S gas. How this gas reacts with carbon steel in oil and gas reservoir is also discussed. This paper also reviews the developments of corrosion prediction software of H2S corrosion. The corrosion mechanism of H2S combined with CO2 gas is also in focused. 
Corrosion Rate of Carbon Steel A106 Gr B in Amine-CO2 Contained Solutions Yuli Panca Asmara; Tedi Kurniawan; Kushendarsyah Saptaji
Indonesian Journal of Computing, Engineering, and Design (IJoCED) Vol. 3 No. 1 (2021): IJoCED
Publisher : Faculty of Engineering and Technology, Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/ijoced.v3i1.120

Abstract

Carbon dioxide (CO2) is one of the corrosive element which exists in oil and gas industries. To prevent CO2 corrosion on carbon steel pipelines, amine-base solvent and caustic solutions are commonly applied. Accordingly, effectiveness of amine base solvent and caustic solutions to reduce risk of corrosion becomes key parameters in determining service lifetime of pipelines made of carbon steel. In this research, the corrosion rate of carbon steel A106 Gr B in amine solutions combined with saturated CO2 gas and caustic solution was studied. The experiments were carried out in static conditions and the Linear Polarization Resistance (LPR) technique was used to measure the corrosion rate (as per ASTM G 5-94). It was found that the corrosion rate in the amine-based solution had shown remarkable results. Somehow, the corrosion rate in an amine-based solvent containing saturated CO2 gas has increased to 200%. The temperature increment to 50°C from room temperature has also increased the corrosion rate. Meanwhile, the caustic addition in amine solution has reduced the corrosion rate of carbon steel.
Uncertainties of Corrosion Measurement Method Based on Tafel Equation Yuli Panca Asmara
JURNAL INTEGRASI Vol 3 No 1 (2011): Jurnal Integrasi - April 2011
Publisher : Politeknik Negeri Batam

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Abstract

Simulation of CO2 Corrosion of Carbon Steel in High Pressure and High Temperature Environment (HPHT) Yuli Panca Asmara
Journal of Integrated and Advanced Engineering (JIAE) Vol 2, No 1 (2022)
Publisher : Asosiasi Staf Akademik Perguruan Tinggi Seluruh Indonesia (ASASI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51662/jiae.v2i1.41

Abstract

In HPHT environments, the mechanism of CO2 corrosion faces a challenge as an effect of chemical-physical reactions on the metal surface. The presence of other elements in the CO2 system complicates corrosion behavior. To provide a realistic mechanism for corrosion process, some corrosion prediction models have developed software using fundamental theories such as electrochemical reactions and thermodynamics theories. Existing methods to predict corrosion rate models in HPHT environments have shown reasonable results. This paper reviews software of corrosion predictions which calculate corrosion rate based on mechanistic theories that study effects of H2S, acetic acid (HAc) concentrations, shear stress, pH in temperature from 25oC – 100oC and pressure from 1–10 bar. From the simulation, corrosion rate increased significantly in the high pressure CO2 environment. Corrosion rate at pH 4 increased to 30 mm/y at a temperature from 15oC to 90oC. While at pH 8 corrosion rate reached 4 mm/y. This lower corrosion rate indicated a tendency for deposits formation at higher pH. Corrosion rate behaves in a different mechanism at high temperatures. The corrosion rate decreased to 4 mm/y when the temperature increased to more than 90oC. Effects H2S gas and HAc were identified to increase corrosion rate. Both elements provide extra cathodic reaction and create limiting current density in the cathodic reaction process based on polarization sweep models. However, the polarization graph calculated using corrosion models could not display passive behavior in the anodic polarization process. Thus, further, improvement should be considered. From the data calculation, it can be shown that corrosion prediction software can predict corrosion rate in HPHT conditions.
Application of Plants Extracts as Green Corrosion Inhibitors for Steel in Concrete - A review Yuli Panca Asmara; Tedi Kurniawan; Agus Geter Edy Sutjipto; Jamiluddin Jafar
Indonesian Journal of Science and Technology Vol 3, No 2 (2018): IJoST: VOLUME 3, ISSUE 2, September 2018
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v3i2.12760

Abstract

High requirements in protection of steel reinforcing bar (steel rebar) from corrosion are necessary since there are multi interaction of corrosive chemicals which cause early damage of concrete buildings. Corrosion of steel in concrete can destroy the concretes and reduce concrete strength. To protect rebar from corrosion, application of corrosion inhibitor is believed to have higher performance compared to other protection systems. To date, organic inhibitors have promising methods in steel rebar protection as they are environment-friendly, compatible with concrete, cost effective and applicable in any various concrete conditions. Thus, demands in using these inhibitors tend to increase significantly. This paper reviews the applications of green corrosion inhibitor specifically highlighted in protecting mechanisms, typical plants extracted, performance in corrosion protection, and classification of green corrosion inhibitors. The corrosion resistances of carbon steels in concrete protected by green inhibitors are in focus. As summary, it can be confidently notified that green corrosion inhibitors for steel in concrete will have a prospect to be used as corrosion prevention in the future with further improvements.
High-temperature Oxidation of Fe-Cr Steels in Steam Condition – A Review Tedi Kurniawan; Farah Alia Binti Fauzi; Yuli Panca Asmara
Indonesian Journal of Science and Technology Vol 1, No 1 (2016): IJoST: VOLUME 1, ISSUE 1, April 2016
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v1i1.2217

Abstract

The development of supercritical (SC) and ultra-supercritical (USC) power plants requires materials with better corrosion properties. Deep understanding on the oxidation mechanism in the boiler environment is one of the important factors to support this development. In this work, high temperature oxidation of Fe-Cr steels in steam condition is reviewed.  Several mechanisms that explain the effect of water vapor in the oxidation behavior the steel were presented.
Techno-Economic and Environmental Analysis of an On-Grid and Off-Grid Renewable Energy Hybrid System in an Energy-Rich Rural Area: A Case in Indonesia Umam, Faikul; Wahyu, Fiki Milatul; Efendi, Mochamad Yusuf; Amir, Nizar; Gozan, Misri; Asmara, Yuli Panca
Journal of Robotics and Control (JRC) Vol 5, No 5 (2024)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v5i5.22633

Abstract

Developing a dedicated renewable energy hybrid system is a viable option for extending access to electrical energy in energy-rich rural areas. This study conducted a feasibility analysis of using a hybrid energy system, combining solar photovoltaic, wind, and biogas, to generate electricity and meet the energy needs of the rural area. West Waru Village is selected as the case study area for this research because it has abundant renewable energy sources. The Hybrid Optimization of Multiple Energy Resources (HOMER) tools is employed for modeling and optimizing the hybrid energy system, offering a comprehensive analysis encompassing technical, economic, and environmental aspects. Furthermore, the study's findings were further analyzed through a sensitivity analysis, considering unpredictable factors such as village load consumption, solar radiation, wind speed, and biomass availability. Additionally, the study’s results reveals that the renewable energy hybrid system can meet nearly 80% of the rural area's electrical energy requirements at a cost of $0.16 per kWh, resulting in the reduction of 8.4 million kg of carbon dioxide emissions. These findings can serve as a baseline for stakeholders in developing renewable energy systems in rural areas.
Improvement of ankle foot orthotics fabrication using 3D printing method Saptaji, Kushendarsyah; Manasikana, Dinda Arina; Juniasih, Octarina Adiati; Ramadhani, Mochammad Rafli; Oktaviandri, Muchamad; Ramadhan, Anwar Ilmar; Asmara, Yuli Panca
SINERGI Vol 28, No 3 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.3.015

Abstract

Orthotics are the body support devices used for correction, immobilization, fixation, and prevention of paralysis. The greatest number of orthotics utilized by people suffering from plantarflexion and dorsiflexion disability, especially in Indonesia, is ankle foot orthotic (AFO). However, the duration associated with fabricating AFO through conventional methods is considered time-consuming. This paper aims to fabricate ankle foot orthotics (AFO) using innovative combinations of 3D scanning and 3D printing. The method begins with 3D scanning of the patient’s lower limb using photogrammetry (3DF Zephyr). The design is generated and adjusted, afterwards, the orthotic prototype is produced by fused deposition modeling (FDM) 3D printing using polypropylene (PP) material. This choice is attributed to the material's advantages, such as being lightweight, rigid, durable, and cost-effective. The 3D mesh model scanned using 3DF Zephyr shows good quality and more precise results. In addition, the prototype produced using 3D printing was tested by walking based on normal gait analysis’s angle of foot and calf measurement, which shows a maximum range of motion (ROM) of 16.1˚. The proposed methods of fabricating orthotic prototypes can successfully reduce the processing time by approximately 70% compared to the conventional method. 
Jainal Sosialisasi Dan Pendampingan Pengolahan Alat Light Traf Menggunakan Cell Surya Untuk Mencegah Serangga Pertanian Di Desa Bangkit Baru Barito Kuala Arifin , Jainal; Herlina, Firda; Hartadi , Budi; Panca Asmara, Yuli
J-Dinamika : Jurnal Pengabdian Masyarakat Vol 9 No 3 (2024): Desember
Publisher : Politeknik Negeri Jember

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Abstract

Bangkit Baru village is located in Barito Kuala, Mandastana sub-district, with a population of ± 1000 people, the majority of the people of Bangkit Baru village make their living as rice farmers, the area of ​​agricultural fields is up to 5,424 hectares, the size of the agricultural land in the village indicates that the majority of local people still depend on agricultural land. Rice is one of the staple foods of the Indonesian people. The development of an area means fertile agricultural land with agricultural products and plantations in the area which are useful for supplying food which is currently still declining. In this activity, the team carried out several methods, including field surveys, then continuing to look for problems that were hampering the local community and making tools to deal with pests and grasshoppers, as well as outreach to local residents. The use of this trap light tool is as a pest trap, the LED lights are included. The device will light up at night, the light will attract insect pests so they will fall into a container filled with water which is right under the UV lamp. Then, the water in the container will trap insects, this is a natural pest exterminator without using chemicals that are still used by local people.
Co-Authors Abdurahim Sidiq Agus Geter Edy Sutjipto Agus Sasmito, Agus Agus Wiramsya Oscar Anwar Ilmar Ramadhan Baskara, Sudesh Nair Budi Hartadi Chan, Choon Kit Dafid, Ach Faikul Umam Faisal Rahman Farah Alia Binti Fauzi Firda Herlina Gao, Yuzhen Gupta, Munish Kumar Idzani Muttaqin Ihwan Ghazali Irawan Noor Jainal Arifin Jamiluddin Jafar Juniasih, Octarina Adiati Kaewthep, Chaloemphol Kushendarsyah Saptaji Lutvi Vitria Kadarwati Manasikana, Dinda Arina Maolana, Firman Misri Gozan Mochamad Yusuf Efendi, Mochamad Yusuf Morshed, Md Monzur Muchamad Oktaviandri Muhammad Renaldy Syahputra Muhammad Saukani Mujiburrahman . Nanang Fatchurrohman Nizar Amir Ramadhani, Mochammad Rafli Raman, Jeyagopi Rendi Sadang Husain Saifullah Arief Sukri, Hanifudin Tedi Kurniawan Tedi Kurniawan Tedi Kurniawan Wahyu, Fiki Milatul Yusuf, Ahcmad