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Pengaruh Waktu Dan Sudut Penyemprotan Pada Proses Sand Blasting Terhadap Laju Korosi Hasil Pengecatan Baja AISI 430 Sulistyo, Erwin; Setyorini, Putu Hadi
Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The purpose of this study was to determine the influence of time and spraying angle on the process of sand blasting on the rate of corrosion of AISI 430 painting. Research conducted by the method of experimental research. Parameters in the sand blasting process used was the time of spraying with a variation of 35 seconds, 55 seconds, 75 seconds and 95 seconds and spray angle with the variation of 60 Â°, 75 Â° and 90 Â°. This type of paint used paint is NC (Nitrocellulose) with electrostatic spray method. Corrosion test carried out by using a wet corrosioncell. Result showed that the angle and time of spraying have an influence on the corrosion rate.The lowest corrosion rate occurs at an angle of 90 Â° spraying and spraying time of 35 seconds with the corrosion rate (milli inch / year) 1.72813E-06, whereas the highest corrosion rate occurred at an angle of 60 Â° and spraying time 95 seconds with a corrosion rate (mils/year)0.00020454.Keywords: sand blasting, corrosion

Proses Pack Nitriding dengan Variasi Suhu dan Media Pupuk Nitrogen Terhadap Kekerasan AISI 420 Sulistyo, Erwin; Setyarini, Putu Hadi; Sudana, Yoni
Jurnal Rekayasa Mesin Vol 1, No 1 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The aim of this research was to investigate the effects of heating temperature and concentration of nitrogen fertilizer, i.e urea and ZA, during pack nitriding to the surface hardnessof AISI 420. The process was done by heating the steel of AISI 420 with temperature varied between 4200C, 4700C, 5200C, 5700C dan 6200C for 6 hours after stress relieving in the pack fulfiled with urea or ZA. The result measured by microvickers hardness tester showed that the hardness increased as the function of the temperature.Keywords : pack nitriding, temperature, hardness, AISI 420, nitrogen fertilizer

Pengaruh Variasi Radius Lingkaran Singgung Dan Radius Lingkaran Dasar Cam (Nok) Simetris Terhadap Karakteristik Kinematik Gerak Roller Follower Sutikno, Endi; Sulistyo, Erwin; Anindito, Ariyo
Jurnal Rekayasa Mesin Vol 3, No 2 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The study looked at the kinematic analysis of mechanism design cam - follower roller symmetrical with simulations. After designing the geometry of the observed variable cam is cam base circle radius, radius circle tangent, the other constant. With mathematical equations to model the radial displacement, radial velocity, acceleration and jerk radial follower, then made subsequent mathematical tabulations of results generated graph of displacement, velocity, acceleration and jerk of the cam angle swivel. The result is the kinematics characteristic, its maximum on the radius of the circle tangent to the largest and smallest radius circle.Keywords: cam, follower, roller, base circle, the circle tangent, radial displacement, acceleration, jerk.

Ampas Penyulingan Nilam Sebagai Bahan Bakar Alternatif Pada Proses Produksi Minyak Nilam Sugiarto, Sugiarto; Sulistyo, Erwin
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Remaining organic waste product of nilam oil distillation is a potential biomass as a fuel substitute for firewood. Utilization of waste distillation during refining is considered not yet optimal. Whereas by utilizing distillation waste will be obtained by the double advantage is decreasing the cost of production like reduction of the cost of purchasing firewood, waking environment from illegal logging and encroachment uncontrolled firewood and maintaining forest conservation. This research was conducted by varying waste of nilam distillation mixed fuel with firewood with a variation of 0%, 25%, 50%, 75% and 100% waste compared to firewood. Distillation capacity of each process is 60 kg of raw materials that have been chopped dried nilam. Dependent variables are sought in the form of heating value, temperature data in space heating, steam temperature and volume of nilam oil is produced for each variation of fuel weight fraction of waste nilam. The result is a solid fuel heating value increases with increasing weight fraction of waste nilam compared to the firewood. Zones heating temperatures and steam temperature fluctuated or not stable for all variations of fuel weight fraction of waste nilam. Steam temperature below 100 Â° C which indicates the water content in the steam is still high. Time required for each distillation process with a capacity of 60 kg is still relatively long time is 5 to 6 hours. Volume nilam oil products tend to increase with increasing weight fraction of fuel from the dregs of nilam. Keywords : Waste distillation of nilam, alternative fuel, nilam oil

Camera-based security system application at Perumahan Taman Embong Anyar 1, Dau District, Malang Moch. Syamsul Ma'arif; Sugiarto Sugiarto; Erwin Sulistyo
Community Empowerment Vol 8 No 5 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ce.8232

At Taman Embong Anyar 1 Housing Complex in Dau District, Malang, there is a high crime risk due to residents' activity patterns and open access to residential areas. One of the community's biggest issues is a lack of understanding of using security technology. As an alternative to monitoring the situation in residential areas, CCTV installation and operation assistance are needed to increase environmental security. Beginning with a survey of the areas where CCTV must be installed, the CCTV system must then be selected, installed, and its operation explained to all users. The residents can use and maintain the CCTV system as a result of the entire series of activities. The environment is made more secure and the workload of security officers is minimized with the installation of CCTV.

Determination of Total Ammonia Nitrogen by Gas-Diffusion Flow Injection Analysis (GD-FIA)-Spectrophotometry using Minnieroot Flower (Ruellia tuberosa) as Natural Reagent Putri, Lani Artana; Mufidah Sari, Puspita; Sulistyarti, Hermin; Sabarudin, Akhmad; Sulistyo, Erwin
Makara Journal of Science Vol. 26, No. 4
Publisher : UI Scholars Hub

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Total ammonia nitrogen (TAN) is a pollutant agent found in water and generated from the metabolisms of living organisms and the decomposition of organic matter. This research aims to develop an efficient, low-cost, and environmentally friendly TAN analysis method. The principle of this method is based on the reaction of TAN injected in the donor stream with NaOH to form alkaline gaseous ammonia. The gaseous ammonia diffuses through a hydrophobic membrane into an acceptor stream containing Ruellia tuberosa extract. The presence of NH3 gas in the acceptor stream changes the extract color from pinkish to green, which is monitored by spectrophotometer at 620 nm. This method was also validated based on linearity, selectivity, and accuracy. Under the obtained optimum conditions of 1 M NaOH, 5% extract, a 120 cm mixing coil, and a 200 µL sample volume, the proposed method showed excellent linearity at 10–1000 ppm (R2 = 0.993). The selectivity test result shows that this method was selective against sulfite and nitrite compounds up to 600 ppm with a % error value <10%. This method was applied to measure the total ammonia concentration in agricultural water, and satisfying results were shown by high recoveries of 95.03%–98.84%.

The Effect of Boiling Time of Wulung Bamboo Fiber (Gigantochloa Atroviolacea) in NaOH Solution on Tensile Strength of Epoxy Matriced Composites Bintarto, Redi; Widodo, Teguh Dwi; Raharjo, Rudianto; Sulistyo, Erwin; Tamtomo, Bagas
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.3

The purpose of this study was to determine the effect of immersion time of NaOH at a temperature of 60-70 â„ƒ in wulung bamboo fibers on the tensile strength of the epoxy matrix composites. Wulung bamboo fibers (Gigantichloa Atroviolacea) have the potential to be used as reinforced in composites because they have high strength and are widely grown in Indonesia. In this study, bamboo wulung fiber reinforcement was used without treatment and with variations, soaking time 30 minutes, 60 minutes, and 90 minutes in 6% NaOH solution with a temperature of 60-70 â„ƒ. The composite manufacturing method used was vacuum assisted resin infusion and the standard composite specimen used as a tensile test was ASTM D638-01. The results showed that the longer the immersion time resulted in a rougher topography of the fiber surface which caused the composite tensile strength to increase due to the better mechanical interlocking between the fibers and the epoxy resin matrix. The wettability results on the fibers also show that the wetness between the fibers and the epoxy resin matrix is getting better, which is shown from the droplet contact angle on the resulting fibers. The highest composite tensile strength was obtained at 90 minutes immersion time of 169.765 MPa followed by immersion time of 60 minutes of 123.2 MPa, immersion time of 5 minutes of 81.7 MPa and without treatment of 71.6 MPa. Based on the results of the macro photo shows that the treatment given will reduce the failure of the pull out and debonding defects on the composite fracture.

The Effect of Boiling Time of Wulung Bamboo Fiber (Gigantochloa Atroviolacea) in NaOH Solution on Tensile Strength of Epoxy Matriced Composites Bintarto, Redi; Widodo, Teguh Dwi; Raharjo, Rudianto; Sulistyo, Erwin; Tamtomo, Bagas
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.3

The purpose of this study was to determine the effect of immersion time of NaOH at a temperature of 60-70 â„ƒ in wulung bamboo fibers on the tensile strength of the epoxy matrix composites. Wulung bamboo fibers (Gigantichloa Atroviolacea) have the potential to be used as reinforced in composites because they have high strength and are widely grown in Indonesia. In this study, bamboo wulung fiber reinforcement was used without treatment and with variations, soaking time 30 minutes, 60 minutes, and 90 minutes in 6% NaOH solution with a temperature of 60-70 â„ƒ. The composite manufacturing method used was vacuum assisted resin infusion and the standard composite specimen used as a tensile test was ASTM D638-01. The results showed that the longer the immersion time resulted in a rougher topography of the fiber surface which caused the composite tensile strength to increase due to the better mechanical interlocking between the fibers and the epoxy resin matrix. The wettability results on the fibers also show that the wetness between the fibers and the epoxy resin matrix is getting better, which is shown from the droplet contact angle on the resulting fibers. The highest composite tensile strength was obtained at 90 minutes immersion time of 169.765 MPa followed by immersion time of 60 minutes of 123.2 MPa, immersion time of 5 minutes of 81.7 MPa and without treatment of 71.6 MPa. Based on the results of the macro photo shows that the treatment given will reduce the failure of the pull out and debonding defects on the composite fracture.

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