Jurnal Teknologi dan Ilmiah Teknik Mesin (JTITM)

Efektivitas Pelapisan Antikorosi pada Pipa dan Permukaan Logam di Lingkungan PLTU Gresik

achmad mirza yusuf assyehggaf achmad mirza yusuf assyehggaf — 2025-07-30

Pusat Listrik Tenaga UAP (PLTU) merupakan salah satu jenis pembangkit listrik yang bergerak menyediakan energi. PLTU memiliki peran penting dalam mengkonversi energi uap menjadi energi listrik yang dapat digunakan dalam berbagai kebutuhan, khususnya di bidang industri. Dalam melaksanakan kerjanya, PLTU akan menggalami salah satu permasalahan utama yang dihadapi, yaitu korosi dalam sistem perpipaan dan permukaan logam di lingkungan Pembangkit Listrik Tenaga Uap (PLTU). Penelitian ini dilakukan di lingkungan PLTU Petrokimia Gresik selama 7 hari untuk mengevaluasi jenis pelapisan antikorosi yang optimal untuk memperpanjang umur layanan dan meningkatkan ketahanan material logam di PLTU. Metode yang digunakan dalam penelitian ini adalah studi literatur dan eksperimental serta uji laboratorium terhadap sampel logam dengan dan tanpa pelapisan. Hasil penelitian menunjukkan bahwa pelapisan berbasis epoksi dan seng mampu mengurangi laju korosi secara signifikan hingga 60–80% dibandingkan permukaan tanpa perlindungan. Selain itu, pemilihan jenis coating yang sesuai dengan kondisi lingkungan sangat berpengaruh terhadap kinerja jangka panjangnya

analisis modifikasi impeller untuk meningkatkan efisiensikerja pompa shimizu ps130bt dengan DOE

AHMAD NUR HIDAYAT UNIVERSITAS GRESIK — 2025-08-04

This study aims to analyze the effect of impeller modification on the performance efficiency of the Shimizu PS 130BT water pump using the Design of Experiment (DoE) approach. The impeller was modified by altering the blade shape and blade count to obtain various fluid flow characteristics. The DoE method was applied to identify the optimal design combination by testing parameters such as flow rate, total head, motor power, and pump efficiency. The results indicate that impeller geometry modifications significantly enhance the pump’s efficiency compared to the original manufacturer design. This research is expected to serve as a reference for developing more energy-efficient and optimal pump designs for domestic and small-scale industrial applications.

Keywords:Impeller modification, pump efficiency, Shimizu PS 130BT, Design of Experiment (DoE).

Pengaruh Variasi Kecepatan Putar terhadap Laju Korosi Baja ST 37 dalam Media Korosif

Mohammad Iqbal Faza Masyrofi — 2025-07-30

Corrosion is a major problem in the automotive industry, especially in ST 37 steel used in vehicle components such as motorcycle spokes. The humid tropical environment and exposure to rainwater accelerate the degradation of the material. This research aims to analyze the effect of rotational speed on the corrosion rate of ST 37 steel in rainwater media through a literature study approach. Data were collected from various sources of previous research that addressed the interaction between flow velocity, rainwater chemical properties, and microstructure characteristics of ST 37 steel. The results of the study showed that an increase in rotational speed can accelerate the corrosion rate due to erosion of the protective layer and increased electrochemical reactions on the metal surface. This study shows that dynamic speed and environmental conditions have a great influence on material durability. Therefore, surface protection and material selection should be considered in the design of automotive components to improve the service life and safety of vehicles.

TM ANALISIS PENGARUH HOLDING TIME PEMANASAN INDUKSI TERHADAP BAJA SUP 9

Ahmad Muqorrobin Universitas gresik — 2025-08-04

^{This research aims to analyze the influence of holding time during the induction heating process on the mechanical properties and microstructure of SUP9 steel. SUP9 steel is a spring steel widely used in automotive and industrial applications due to its combination of hardness and toughness. The induction heating process offers the advantages of rapid and concentrated heating, but variations in holding time after reaching the austenitizing temperature can significantly impact phase formation and grain growth. In this study, SUP9 steel specimens were inductively heated to a specific austenitizing temperature and held for 0 seconds, 5 minute, 10 minute, dan 15 minute before cooling. After heat treatment, Vickers hardness, tensile strength, Charpy impact toughness tests were conducted, along with microstructural observation using an optical microscope and a scanning electron microscope (SEM). The results indicate that increasing the holding time tends to cause an increase in austenite grain size, which subsequently affects the size and distribution of the martensite phase after cooling. The correlation between holding time and the mechanical properties and microstructural changes will be discussed in detail, providing important insights for optimizing induction heating process parameters in the production of SUP9 steel components.}

Perencanaan Mesin Pencacah Plastik Kapasitas 20 Kg/Jam

Mohammad Zefri — 2023-09-07

This research aims to design a plastic shredding machine with a production capacity of 20kg per hour. The plastic shredder is designed to reduce plastic waste and facilitate the recycling of plastic materials into smaller and more manageable sizes. This research adopts a design and optimization method for the machine system. The machine design includes the selection and arrangement of blades, the driving motor, as well as the cutting and shredding system for plastic materials. Furthermore, testing and performance evaluation of the plastic shredding machine were conducted to ensure its reliability and operational efficiency. The results of this research demonstrate that the designed plastic shredder successfully achieved the target production capacity of 20kg per hour. The use of specialized blades and an appropriate driving motor provided optimal plastic cutting and shredding results. The machine is capable of transforming plastic waste into small fragments, facilitating further processing. Performance testing of the machine showed its stability and high energy efficiency. This research makes a significant contribution to the development of high-capacity plastic shredding machines, thereby enhancing the efficiency of plastic waste recycling processes. It is expected that the findings of this research will provide a foundation for the future development of more efficient and environmentally friendly plastic shredding machines.

Rancang Sensor Suhu Menggunakan Sistem Kontroler Pid pada Radiator Mesin Genset Caterpillar 3516 Guna Mencegah Terjadinya Overheat

Mohammad Wahyudin — 2023-09-07

Genset is a device that functions to generate electric power as a substitute with the working principle of converting mechanical power into electrical energy. Which consists of a set of combined equipment from two different devices, namely the engine and generator. In a diesel generator that must be considered, namely supervision and maintenance of the engine, because what is currently being done is not optimal and results in the impact of the work system on the generator engine being disrupted. There was a problem with one of the generator units experiencing overheating at 87°C. By doing additional control of the temperature of the radiator temperature in order to find out the limits on the engine work system. So this research was carried out to design a simple control that can work automatically to stop the engine in an emergency when the maximum temperature in the radiator has reached the limit or excessive load usage. The design of this generator temperature measuring device uses thermocontrol as a system controller and uses a type k thermocouple as a temperature sensor, relay, timer, buzzer and alarm shirine as supporting tools. the contact or timer terminal is connected automatically to the emergency stop button which will then cut off the current and the working process of the generator engine stops. Based on the results of the analysis of the tests carried out in this study, the tool works at temperatures above 75°. then the thermocontrol works to send a signal to the relay, and sends a signal to the timer and the buzzer lights up, then the output of the timer automatically disconnects the current with a delay on the timer for 5 seconds. The generator turns off automatically and is marked with a shirine alarm warning that lights up and works to find out if the generator is overheated

Analisis Laju Korosi Carbon Steel ASTM A283 Grade A , Stainless Steel AISI 304L Dan AISI 316L Dalam Cairan Asam Sulfat

Priambodo Galih Puspito — 2023-09-07

The chemical industry's consistent growth necessitates increased quantities of raw and secondary materials, with sulfuric acid being a vital component in various applications such as phosphoric acid production, fertilizers, detergents, pharmaceuticals, laboratory reagents, and water treatment. As sulfuric acid is highly corrosive, selecting appropriate corrosion-resistant materials is crucial. This study aimed to assess corrosion rates in sulfuric acid solutions for ASTM A283 Grade A carbon steel, AISI 304L, and AISI 316L stainless steel. ASTM A283 Grade A, AISI 304L, and AISI 316L specimens were immersed in 98% and 37% sulfuric acid solutions for 27 days, and corrosion rates were determined using the weight loss method. Results revealed the highest corrosion rates in 98% and 37% sulfuric acid for ASTM A283 Grade A steel, measuring 29.68 mpy and 1191.06 mpy, respectively. In contrast, AISI 316L exhibited the lowest corrosion rates, at 1.91 mpy and 814.61 mpy. Uniform corrosion, characterized by surface color changes and area reduction, occurred in all specimens. The concentration of sulfuric acid significantly influenced steel corrosion rates, with solubility of the FeSO4 film layer being a key factor. Lower solubility values conferred higher corrosion resistance, while higher values indicated lower resistance.

Analisis Ketahanan Coating Zinc Rich Primer Ketebalan 10, 20, 30 dan 40µm pada Baja SUP 9 Terhadap Larutan Garam Shodium Chloride pada Temperatur 35°C

Yokanta esza Millenio Pratama — 2023-09-07

Steel material is susceptible to corrosion, due to the metallic nature of the material. Corrosion occurs due to the release of ions in the material to the environment. The protection that is often used in steel materials is coating. Coating is a form of coating a material with another material that can withstand the corrosion rate. This research was conducted to determine resilience coating cat zinc rich primer base in salt solution sodium chloride with a concentration of 5%, with a thickness of 10, 20, 30, 40µm, and a steel ratio of SUP 9 without coating paint, with a temperature of 35°C. Where will the specimen be tested within 240 hours, while data is collected every 24 hours. From the results of this study it was found that in SUP 9 steel salt solution corrosion occurred within 48 hours. Meanwhile, SUP 9 steel which is in coating paint thickness 28-33µm, paint damage occurs within 168 hours. While the standard is 144 hours, the paint thickness for SUP 9 spring steel uses paint Zinc Rich Primer Base is 30µm.

Perancangan Mesin Pencacah Rumput Ternak Kapasitas 700 Kg/Jam

Mohammad Sayyidul Kautsar — 2023-09-07

This study aims to design a livestock grass chopper with a capacity of 700 kg/hour. The machine used is a Honda GX160T2-SD with a power specification of 3.38 kW (5.2 Hp) and n1 rotation of 3600 rpm. Through calculations and analysis, it is obtained that the n2 synchronous rotation is 2755.1 rpm which is in accordance with the needs of the chopper. The single transmission system used consists of 2 pulleys with a shaft pulley with a diameter of 108.5 mm and a motor pulley with a diameter of 86 mm. The two pulleys are connected using a v-belt type B-46 with a length of 707.36 mm. The resulting V-belt belt speed is 14.13 m/s, with a distance between the pulley axes of 330.116 mm, and the pulley contact tilt angle of 176°. The design of this chopper is expected to contribute to increasing efficiency and productivity in the processing of livestock grass.