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Yasmina Amalia
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INDONESIA
Journal of Metallurgical Engineering and Processing Technology
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 27236854     EISSN : 27981037     DOI : https://doi.org/10.31315/jmept
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Journal of Metallurgical Engineering and Processing Technology diterbitkan oleh Program Studi Teknik Metalurgi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional "Veteran" Yogyakarta. Journal of Metallurgical Engineering and Processing Technology terbit dua kali dalam satu tahun, yaitu Februari dan Agustus. Fokus dan ruang lingkup Journal of Metallurgical Engineering and Processing Technology adalah Pengolahan Mineral, Batubara, Metalurgi Ekstrasi, Metalurgi Fisika, Metalurgi Mekanik, dan Pengelolaan Mineral
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Vol 4, No 1 (August 2023)" : 10 Documents clear
Study of Sulfuric Acid and Hydrochloric Acid as Acid Wash Reagents to Remove Ag, Cu and Fe Andika Saputra; Ravii Kato; Yogi Gautama Yanas; Fahrul Rozzi Usman
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.9139

Abstract

In Indonesia there are several areas that have gold deposit reserves, one of which is located in Bakan Village, North Sulawesi. Gold ore in Bakan Village is extracted by heap leaching method by PT. J Resources Bolaang Mongondow. This study aims to analyze and compare 1 M sulfuric acid (H2SO4) and 3% hydrochloric acid (HCL) as acid wash reagents to remove Ag, Cu and Fe. This acid wash study was carried out using the bottle roller test method using two different reagents, sulfuric acid and hydrochloric acid. The results of the research on the acid wash process The results showed that the effective reagent in dissolving base metals was 1 M sulfuric acid (H2SO4) with the solubility percentage of each element as follows Ag 0.3%, Cu 20.2%, Fe 60.4%. Meanwhile, 3% hydrochloric acid was only able to dissolve Ag 0.4%, Cu 4.3% and 4.3% Fe.
Sigma Phase Effect on Pitting Corrosion of Super Duplex Stainless Steel UNS S32750 Karyanto Herlambang; Aldyno Henry
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.10179

Abstract

The welding process on Super Duplex Stainless Steel material can cause decreased corrosion resistance of Super Duplex Stainless Steel material. This process occurs a lot in the heat treatment process piping and pipeline. This decrease in corrosion resistance occurs due to the formation of sigma phase precipitation due to heat treatment of the metal. This research will determine the relationship between the ratio of heat input cold pass: the ratio of heat input root pass to the percentage of sigma phase and the relationship between the percentage of sigma phase to the weight loss value. accompanied by the formation of pitting corrosion on UNS S32750 Super Duplex Steel. Test Coupon (TC) specimens obtained from as-welded with the ratio of heat input cold pass : ratio of heat input root pass (TC-1=74%; TC-2=70%; TC-3=68%; TC- 4=61 %) which was then tested for microstructure. The percentage of sigma phase obtained is TC-1 = 13.96%, TC-2 = 8.33%, TC-3 = 8.33%, and TC-4 = 4.38%). The corrosion resistance test yielded weight loss values (TC-1 = 14.67 gr/m2, TC-2 = 11.71 gr/m2, TC-3 = 1.27 gr/m2, and TC-4 = 2.71 gr/m2). This study concludes that the formation of the sigma phase will be directly proportional to the value of the root pass heat input ratio: the cold pass heat input ratio. The higher the percentage of sigma phase, the higher the weight loss value in the corrosion test, which will cause pitting corrosion.
The Influence of Stirring Speed on Tensile strength of Fiberglass Composite using VARI Method Farhan Rasyid Hidayat; Ferry Setiawan; Dhimas Wicaksono
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.10414

Abstract

This study investigates the influence of stirring speeds variation (50 rpm, 100 rpm, and 150 rpm) on  tensile strength of fiberglass composite  fabricated by  Vacuum Assisted Resin Infusion (VARI) method. The VARI process involves injecting resin into dry fibers placed inside a plastic bag under low pressure, ensuring complete wetting of the fibers. The research aims to identify the optimal stirring speed for composite production by performing tensile tests. Results show that the stirring speed of 150 rpm yields the highest tensile strength, while the 50 rpm variation exhibits the lowest. Photomicrographs reveal the presence of voids in certain area , impacting composite density. The study concludes that stirring speed significantly affects tensile strength and density.
Design Of Lifting Aid Materials To Optimize Waste Loading Into Sealed Containers Supriyadi Junus
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.10185

Abstract

Waste management in a field from 2016 to 2017 carried out using closed containers can only load 10 Jumbo Bags with an average weight of 6.74 tons per container. While the waste management cost component, 51.7% is influenced by the cost of transportation through containers. The problem of loading waste during handling is greatly influenced by the lifting aids used for loading so that it can maximize the loading of waste into closed containers which are transportation tools used to transport waste. This study will focus on designing lifting aid materials for loading waste into sealed containers.. The material used is 6" sch 40 pipe and 3“sch 40 pipe. The design was first simulated using stress analysis software to determine the threshold of yield strength of the material used. After production of the lifting aid, the welded joints was tested with magnetic testing which shows no defect.. The lifting aid is able to optimize the loading of waste as much as 1968 tons using 130 containers where each container contains 15 jumbo bags and weighs 15.14 tons. This can reduce the number of containers that are a major cost component in transporting waste.
Magnetic Flux Leakage for Tank Inspection 2F-4905 Rangga Buana
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.8668

Abstract

In the world of metal and non-metal industries, materials are a common thing. However, to get a quality material, a test needs to be done. One of them is the Magnetic Flux Leakage (MFL) method which is widely used for Non-Destructive Test (NDT). NDT is one of the activities to test the properties of metals which is often known as physical metallurgy. In this study, it was carried out to detect defects or corrosion in the bottom of storage tank 2F-4905 at PT Mitsubishi Chemical Indonesia by applying API 650 Standard. This is done as a form of occupational health and safety program to ensure there is no potential damage that can cause leaks in the future. The results obtained from the inspection found no irregularities or defects in the test results that did not meet the acceptance criteria set by PT MCCI based on the standard for storage tanks, namely API 650.
Experimental Analysis of Magnetic Particle Inspection on S355J2 Steel Weld Joints Muhammad Avicena Apriliansyah
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7813

Abstract

NDT (Non-Destructive Test) is a form of testing carried out on materials or objects without causing permanent damage to these materials or objects. This study aims to determine the NDT Magnetic Particle Inspection testing process that is carried out and find out the results of the inspection of S355 J2 steel specimens with the NDT Magnetic Particle Inspection test method as the basis for determining the GMAW Welder Qualification. Welding of S355 J2 Steel is performed by a certified welder using GMAW welding using a single V-butt joint at an angle of 30 degrees. NDT Visual Test and Magnetic Particle Inspection are carried out during material testing. Data & output shows welder PT. INKA qualified with the standards set by the company, namely AWS D1.1 and ASTME E 709. So the Welder can be allowed to work on a Project because it is considered to have met the required Welder qualification standards.
Metal Failure Analysis and Maintenance Planning on Gasoline Storage Tank Pipe PT Pertamina Refinery Unit VI Asfitrah Alamsyah
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.9134

Abstract

Inspection and corrosion controlling is essential to avoid work accidents and losses to the company. In this study, the authors conducted a case study with PT Pertamina Refinery Unit VI Balongan, which processes crude oil into fuel, non-fuel, and petrochemical products. Material failure analysis was carried out by inspecting the pipes of the gasoline storage tank, which indicated corrosion. Tests were carried out by analyzing pipe thickness, water impurities, XRD, and SEM-EDX. The test results showed pipe thinning from 24 to 20 inches. Corrosion in gas storage tank pipes is caused by iron oxide, the main product of corrosion, and chlorine as a catalyst that accelerates corrosion. In addition, the SEM test shows a flowery structure, indicating surface defects. Apart from that, XRD testing on the deposits that cover the pipes shows the presence of goethite, hematite, and magnetite, which are oxidation products of iron or carbon steel. Controlling chlorine levels and using inhibitors can be one way to manage corrosion in pipes.
Implementation of Sodium Hydrosulfate (NaHS) Flotation with F83 and F515 on Mass Recovery of Gold Ore Lintang Larasati Adi Putri
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.9338

Abstract

There exist more and more gold mines in Indonesia, especially those that have just been started. It is indispensable to do test work to decide the process flow that will be utilized. Reagent usage tests on the flotation of gold ore were carried out to determine the mass recovery obtained by using a specific reagent and to determine which reagent is more optimal and profitable for further test work. Flotation is carried out using mechanical flotation with F83 and F515 as collector and frother respectively along with the addition of NaHS as modifier or sulfidization reagent.. Based on the flotation that has been conducted, it is known that the use of NaHS enhances the mass recovery obtained. Moreover, compared to the usage of other reagents, flotation with NaHS gives a slightly larger mass recovery with an increase around 2-3%. This indicates that the gold ore used is ores that have been oxidized More in-depth test work is required to get the optimal dose to obtain considerable mass recovery.
Analysis of Penetrant Test Results of S355J2 Steel Welding Connections for Qualification Welding Irsyadi Farhan Efriandi
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7869

Abstract

NDT (Non Destructive Test) is a form of testing perfomed on materials or objects without causing permanent damage to the material or objects. NDT can be used for testing materials such as concrete, steel, iron, and other. This journal aims to determine the Penetrant Test testing process on S355J2 steel welding results to determine the qualifications of GMAW Welders. Welding testing by a certified welder using GMAW welding. NDT testing was conducted in the form of a visual test and a Penetrant test when testing the weld results. The obtained data showed the welder PT. INKA is qualified with the terms and standards that have been set by the company, namely AWS D1.1 and ASTME E 165. Therefore, the Welder can be involved in the current project.
Experimental Study on the Corrosion Rate Influence Caused by Seawater on Aircraft Structures Marga Dharma Prayoga; Heru Susanto; Muhammad Luqman Bukhori
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7560

Abstract

Airplanes are a very fast and time efficient means of transportation. In Indonesia itself, because the country is an archipelago and has a tropical climate, rainwater and seawater are the main problems in the aviation world, this is evidenced by the corrosion that occurs in every aircraft maintenance. Factors that cause corrosion and corrosion rate are acidity, environmental conditions, and materials used. The material that is often used in aircraft is 2024 T-3 aluminum material which is strong, lightweight, and also resistant to corrosion, but because 2024 T-3 aluminum has several mixtures of other materials such as iron, copper, and copper,other materials, then aluminum can also be exposed to corrosion and corrosion rates. Corrosion and corrosion rate can be determined using the weight loss method which is used to measure the rate of corrosion that occurs, it is proven in 72 hours the material has experienced a corrosion rate of 0.002 mpy and the corrosion rate continues to increase every day, and to see the corrosion that occurs on the material used micro photos to see the type of corrosion. But the weight loss method is not very accurate because the weight loss that occurs from the material is the result of abrasion when sanded. In addition, seawater is the biggest influence on the corrosion rate problem when compared to rainwater.

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