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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Indonesian Journal of Chemistry Buletin Pengabdian kawanad Jurnal Polimesin JURNAL REKAYASA KIMIA & LINGKUNGAN
ALI, NURDIN
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Journal : Jurnal Polimesin

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Comparative study of performance of temiki (Melastomacandidum) and rubek (Calotropis gigantea) extract inhibitors for carbon steel in corrosive media Supardi, Joli; Rizal, Samsul; Ali, Nurdin; Fonna, Syarizal; Ikramullah, Ikramullah; Veranita, Veranita; Arifin, A.K.
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i6.4577

Abstract

The use of synthetic inhibitors that negatively affect the environment is still used. Organic inhibitors are the best and most environmentally friendly solutions such as Temiki plants (MelastomaCandidum) and Rubik (Calotropis Giganteen) which have good corrosion cell inhibitor properties and have the potential to be used as corrosion inhibitors. This study analyzed Temiki and Rubik extracts as corrosion inhibitors in carbon steel using the weight loss method in 3.5% NaCl solution and analyzed the efficiency of the inhibitors. Temiki and Rubik's are extracted by drying the leaves, stems and flowers under the sun. Then the material is mashed together and distilled by the solid-liquid method with the Soxhlet tool. Identification of plant components using Gas Chromatography-Mass Spectrometry (GC-MS). Density and viscosity were analyzed following ASTM D 4052 and ASTM D 445 standards. Weight loss method testing was carried out at inhibitor concentrations of 200, 300, 400 and 500 ppm, with soaking time for 15 weeks and data collection was carried out every week. The results of the analysis showed the highest corrosion rate in Temiki extract with a concentration of 500 ppm reaching 1,569 mpy and the lowest at a concentration of 500 ppm reaching 0.157 mpy. In Rubik's extract inhibitors, the highest corrosion rate occurred in 500 ppm inhibitors reaching 1,268 mpy, while the lowest occurred at 200 ppm concentrations reaching 0.331 mpy. The highest efficiency value is the 400 ppm Temiki inhibitor with efficiency reaching 82.89% and the lowest at 500 ppm reaching 19.55%. while for the efficiency of Rubik's extract inhibitors, the highest value was 62.71%, at a concentration of 200 ppm. While the lowest is 28.40%, at 500 ppm inhibitors. These results show that Temiki and Rubik's extracts can still function well as corrosion inhibitors in low-carbon steels in NaCl solution.
Structural failure study of truck rear wheel drive axle with defect variation using finite element method Husaini, Husaini; Rizki, Ulil; Ali, Nurdin
Jurnal Polimesin Vol 22, No 6 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i6.5886

Abstract

A truck is a major form of transporting goods on land because of its efficiency in terms of cost and effectiveness. Increased truck usage has heightened the risk of component failure, particularly in the rear-wheel-drive axle, which is prone to structural problems. Therefore, this study aimed to analyze the causes of rear-wheeldrive axle failure in trucks through numerical simulations based on the finite element method, using Finite Element Modeling and Postprocessing (FEMAP) software. The axle material used was AISI 4140, with four test models, including a version without defects and three other models with variations in defects at certain locations. During the investigation, the analysis was conducted to observe the effect of stress on axle performance under various defect conditions. The simulation results showed the maximum von Misses stress on the shaft without defects reached 115.19 MPa, which was significantly lower than the yield strength limit of 415 MPa of the material. The maximum shear stress of 124.67 MPa also remained lesser compared to the material allowable limit of 239.45 MPa, showing that the shaft was safe in a condition without defects. However, in the shaft model with defects, stress intensity factor (KI) values were recorded at 17.80, 15.01, and 20.325 MPa.m1/2, which exceeded the material fracture toughness (KIC) value of 10 MPa.m1/2. The results signified that KI KIC condition, facilitating accelerated crack propagation on the shaft, showing the potential for structural failure. This study provided a deep understanding of the importance of defect mitigation to maintain the reliability and safety of truck operations
Co-Authors Alfisyahrin Ali, Masri ARHAMI Arhami, A Arif, Zainal Ariffin, Ahmad Kamal Arifin, A.K. Bachtiar, Dandi Baehaqi Bakhtiar, Dandi Fonna, Syarizal Husaini Husaini Husaini Husni Ikramullah, Ikramullah IRMA DEWI Khairil Khairil M. Nizar Machmud Masri Masri Ibrahim Nasution, Elvy Sahnur Pradinata, Edy Putra, T. Edisah Razali Rizki, Ulil Sabri Saputra, Mahendra Saputra, Yumaidi Suhaeri Suheri Sulaiman Thalib Syahriza Syahrizal Syifaul Huzni Syukri , Mahdi Syukriyadin Udink Aulia Veranita, Veranita Zulfadhli Zulfan