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Nevada M.J. Nanulaitta
Politeknik Negeri Ambon
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ANALISA REMAINING LIFE DAILY STORAGE TANK DI PLTMG SERAM PEAKER 20 MW MASOHI – MALUKU TENGAH Kelian, Nur Aisyah Utami; Patikayhattu, Erwin; Nanulaitta, Nevada. J. M.; Leatemia, Meiti
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2911

Abstract

Increased global energy demand has resulted in rapid growth in the oil and gas industry, including in Indonesia. Storage tanks play an important role in the storage of large quantities of liquids and must comply with strict technical standards and government regulations, such as American Petroleum Institute (API) 650, 653, and 575 and Permen of ESDM No. 32 of 2021. Seram Peaker 20 MW Masohi-Maluku Tengah MHP, as a vital asset for providing electrical energy, has a fuel storage tank that has never been inspected since the beginning of its operation. Non-compliance with API 653 standards potentially poses a risk of structural damage, leakage, and disruption to fuel supply. This research identifies the importance of periodic structural integrity evaluation using an Ultrasonic Thickness Gauge GM 100 to measure the decrease in plate thickness due to corrosion and predict the remaining service life of the tank. The results of the calculation show that each course starting from course 1-5 is 109.4 years, 72.3 years, 56.9 years, 43.6 years, 38 years, this shows that the Daily Storage Tank PLTMG Seram Peaker 20 MW Masohi-Central Maluku can operate for the next 38 years. Keywords : Storage Tank, Remaining Life, Inspections, UTG, Corrosion Rate
Pengaruh Variasi Persentase Cangkang Kerang (Caco3) Dan Karbon Arang Kayu Nani Pada Proses Karburasi Terhadap Sifat Mekanis Serta Laju Korosi Baja Karbon Sedang Huka, Graciadiana I; Matheus, Josef; Lekatompessy, R.R.; Nanulaitta, Nevada J.M
Journal Mechanical Engineering Vol. 3 No. 1 (2025): APRIL
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i1.3348

Abstract

The effect of additives such as seashells (containing CaCO₃) and nani wood charcoal on the mechanical properties of steel during the carburizing process is significant. The addition of CaCO₃ acts as a catalyst, accelerating carbon diffusion into the steel's microstructure, thereby increasing surface hardness and flexural strength. The results showed that increasing the percentage of CaCO₃ up to a certain point can increase the hardness and strength of the steel, with the highest hardness value achieved at a variation of 50% CaCO₃ and 50% nani wood charcoal, at approximately 21.93 HRC. Hardness testing showed that the variation of additives directly affected the final hardness, with the highest value being achieved at the optimal combination of CaCO₃ and nani wood charcoal. In addition to hardness, other mechanical properties, such as bending strength, also showed an increasing trend with increasing CaCO₃ proportions up to the optimal point, namely at a variation of 70% CaCO₃ and 30% nani wood charcoal, which resulted in a bending stress of 32.64 MPa and a bending strength of 3336.14 MPa. Therefore, the adjustment of the proportion of additives is a key factor in optimizing the mechanical properties of steel through the carburizing process enriched with these natural materials. Keywords: seashells, nani wood charcoal, catalyst, a bending strength
Analysis of the Effect of Paint Adhesion and Hardness on the Car Body Painting Process by Varying the Percentage of Paint Mixture Nanulaitta, Nevada J.M; Huka, Graciadiana I; Demmatacco, F; Pelasula, Berthy
Journal Mechanical Engineering Vol. 3 No. 1 (2025): APRIL
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i1.3351

Abstract

This study aims to analyze the effect of varying paint and thinner mixtures and the number of coats applied on the adhesion and hardness of car paint. The research method used was experimental, varying the paint:thinner ratio (100:110, 100:120, 100:130, and 100:140) and the number of coats applied (2 and 3). Adhesion testing was performed using a Cross-Cut Adhesion Tester, while hardness testing was performed using a Shore D Durometer. The results showed that a paint:thinner ratio of 100:130 provided optimal results for both tested parameters. In the adhesion test, the 100:130 ratio achieved level 5B (best) with no paint peeling, while in the hardness test, it reached the highest value of 88.77 HD. Excessive addition of thinner (ratio 100:140) resulted in a decrease in quality, with adhesion decreasing to level 3B and hardness dropping to 83.3 HD. Variations in the number of coats showed that using two coats provided more consistent results than three coats, especially in terms of adhesion. This study concluded that an optimal balance between paint and thinner is crucial for achieving good paint quality, with a 100:130 ratio providing the best results for automotive body painting applications. Keywords: Automotive Body Painting, Paint Adhesion, Paint Hardness, Paint-Thinner Mixture Variations, Paint Coating
Co-Authors Agustinus O. Lopuhaa Annafiyah Annafiyah Basri Katjo Clara Sekeroney Cley Talkua Demmatacco, F Eka R. M. A. P. Lilipaly Erwin Bravor Pattikayhatu F. Demmatacco Faizatur Rohmah Frederick Dematacco Fredrik Demataco Graciadiana. I. Huka Helen Riupassa Hendry Y. Nanlohy Herman Tjolleng Taba Hermon Latumaerissa Hermon. Latumaerissa Huka, Graciadiana I Ike Dayi Febriana Imam A Hanifah Josef Matheus Julian Salakory Kelian, Nur Aisyah Utami Laily Ulfiyah Lasamahu, Stevanno B D Latuconsina, Muhammad Jen Leatemia, Josua M. Leatemia, Meiti Lekatompessy, R.R. Lekatompessy, Roy R. Leslie S Loppies Lukman Hadiwijaya Malakauseya, J. J Marthina Mini Masaki Yamaguchi Matheus, J Mohammad Anas Fikri Nanse H. Pattiasina Patikayhattu, Erwin Patty, Alexander A. Pelasula, Berthy Picanussa, Jovancko. S. S. Ramadhan, Fahri Ratna Ayu Dewi Ratna Ayu Pawestri Kusuma Dewi Rey Joy Toding Padang Roy R Lekatompessy Rudy Soenoko Soeprapto, Wahyono Steanly R.R. Pattiselanno Steanly R.R. Pattiselanno