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PENGARUH KONSENTRASI INHIBITOR ASAM ASKORBAT DAN KONSENTRASI LARUTAN NATRIUM KLORIDA TERHADAP LAJU KOROSI BAJA KARBON RENDAH PASCA PELAPISAN CAT EPOXY Prasetya, Ervan Harry
Jurnal Nosel Vol 2, No 3 (2014): January
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The purpose of this study was to investigate (1) Effect of the concentration ascorbic acid (AA) in a solution NaCl on the corrosion rate low carbon steel after coating process of epoxy paint. (2) Effect of NaCl concentration on the corrosion rate low carbon steel after coating process of epoxy paint. (3) Interaction of the effect between the inhibitor concentration AA with NaCl concentration on the corrosion rate low carbon steel after coating process of epoxy paint. The study is an experimental study. The reseach procedure uses four steps of preparation, experimentation and data collection, data analysis, conclusions. The research site in Polytecnic Manufacturing Ceper and Laboratory Faculty of Chemistry UNS. This study uses a 3x5 factorial experimental design. The population of the research was low carbon steel after coating process of epoxy paint. The sample of the research was AISI 1006 low carbon steel after coating process of epoxy paint. The sampling technique using random sampling. The experimental treatments with three replicate that using 45 samples. The method of data collection used in study is the experimental method. The results of this study are: (1) There is an influence of variation concentration of inhibitor AA to the corrosion rate of low carbon steel after coating process of epoxy paint, the addition of AA with a concentration below 100 ppm is increase the corrosion rate, whereas the addition of AA with a concentration above 100 ppm is decrease the corrosion rate. (2) There is an influence of NaCl concentration to the corrosion rate of low carbon steel after coating process of epoxy paint. The concentration of NaCl is directly proportional to the corrosion rate of low carbon steel after coating process of epoxy paint. (3) There is interaction effect between AA concentration of NaCl concentration on the rate of corrosion of low carbon steel after coating epoxy paint. The addition of AA concentration is directly proportional to the concentration of NaCl.

UPAYA MENINGKATKAN KEAKTIFAN DAN HASIL BELAJAR SISWA DALAM PEMBELAJARAN SISTEM PENDINGIN DENGAN MENGGUNAKAN MEDIA AUDIO VISUAL PADA SISWA KELAS X PROGRAM KEAHLIAN TEKNIK KENDARAAN RINGAN SMK NEGERI 1 MONDOKAN SRAGEN TP 2011/2012 Nugroho, Deny Setya
Jurnal Nosel Vol 1, No 3 (2013): January
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The purpose of this research are: (1) To determine the level of students' understanding of the material cooling system, (2) To determine the use of multimedia technologies will have an impact in the field of education, so that it must be addressed by creating a new instructional media or develop existing there, (3) To determine the effect of the use of audio-visual media to the increased activity and student learning outcomes in SMK Negeri 1 MondokanSragen. This type of research is Classroom Action Research (CAR) conducted in two cycles, each cycle consisting of: (1) action planning, (2) implementation of actions and observations, and (3) Reflection. Subject implementing measures in this study is an observer and subject teachers Cooling System, while class X-3 Light Vehicle Engineering SMK Negeri 1 MondokanSragen number of 32 students as subjects receiving action. Data collection methods used were observation, interviews, documentation and field notes. The technique of data analysis is descriptive comparative, quantitative description and qualitative description that consists of data collection, data reduction, and data presentation, drawing conclusions. The results show that this class action: (1) The utilization of audio-visual media can enhance learning in class X activity Skills Program Light Vehicle Engineering SMK Negeri 1 MondokanSragen TP 2011/2012. It is based on data and research findings in the field in the form of written data derived from observations and dialogue. The application of this learning model to increase student activity, the initial conditions of 22%, in the first cycle increased to 63% and on the second cycle increased to 78%. Assessment is based on aspects of student activity 4 things are, spirit, partnership, argued and asked, (2) use of audio-visual media learning can improve learning outcomes motor cooling system in class X Light Vehicle Technical Skills Program SMK Negeri 1 Mondokan TP 2011/2012 . From the empirical data demonstrates the use of audio-visual media to improve student learning outcomes. At baseline the minimum 30, maximum 90, and the average value of 60 with 53% mastery class. In the first cycle 35 minimum value, maximum value of 92 and an average value of 68,3 with 66% mastery class. In the second cycle 50 minimum value, maximum value of 98 and an average value of 77,3 with 81% mastery class .

PENGARUH PENGGUNAAN ELEKTROLISER DENGAN VARIASI DIAMETER KAWAT TEMBAGA DAN VARIASI LARUTAN TERHADAP DAYA MESIN SEPEDA MOTOR HONDA SUPRA- X 125D TAHUN 2007 Purnomo, Kurniawan Adi
Jurnal Nosel Vol 3, No 2 (2014): October
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The purposes of the research are to: (1) know effect of electrolyzer application with varied diameters of copper wire on engine power of Honda Supra X 125D 2007 Motorcycle; (2) know effect of electrolyzer application with varied solutions on engine power of Honda Supra X 125D 2007 Motorcycle. (3) know interaction used varied of diameters copper wire and varied solutions on engine power of Honda Supra X 125D 2007 Motorcycle. The research used descriptive-quantitative method. Sample of the research was Honda Supra X 125D 2007 Motorcycle with machine number JB51E2015321. The research was performed in PT. MOTORCOURSE TECHNOLOGY (MOTOTECH) Yogyakarta and used dynamometer or Dynotest. Data is obtained from magnitudes of engine power with the addition of electrolyzer tube with varied diameters of copper wire and varied solutions. The data of research is listed on table and presented as graphic and then, it is analyzed. The results of the research indicated that (1) there were effects of electrolyzer application with varied diameters of copper wire on power engine of Honda Supra X 125D 2007 Motorcycle was found. Among copper wires with diameters of 1,5 mm, 2,5 mm, and 4,0 mm, it was found that copper wire with diameter of 1.5 mm produced best effect on improving engine power; (2) there were effects of electrolyzer application with varied solutions on engine power of Honda Supra X 125D 2007 Motorcycle. KOH and Na2SO4 were used as solutions, and the first solution had best effect on the improvement of engine power. (3) there were interaction used varied diameter of copper wire and varied solutions on engine power of Honda Supra X 125D 2007 Motorcycle. The biggest interaction to improve the engine power is used copper wire with diameter 1,5 mm and KOH solution. The engine power increased 1,74 % from standard machine condition.

INTEGRASI ANIMASI DAN DISPLAY UNTUK MENINGKATKAN HASIL BELAJAR SISWA MATA PELAJARAN SISTEM PENDINGIN KELAS XI TKR SMK MURNI 1 SURAKARTA TAHUN AJARAN 2014/2015 Utomo, Putut Wahyudi
Jurnal Nosel Vol 4, No 1 (2015): July
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The objective of this research is to improve the learning result in the Cooling System subject matter of the students in Grade XI of Light Vehicle Engineering of Murni Vocational High School 1 of Surakarta in Academic Year 2014/2015 through the integration of the animation learning model and the display learning model. This research used the classroom action research with two cycles. Each cycle consisted of four phases, namely: planning, implementation, observation, and reflection. The subjects of research were the students as many as 33 in Grade XI of Light Vehicle Engineering Department of the aforementioned school. The data of research were obtained from primary and secondary ones. The former were the learning result in the Cooling System subject matter and the latter were lesson plans, syllabus, and documents. The data of research were colloected through test and observation on the teaching and learning activity process. They were validated by using triangulations and descriptively analyzed by using the percentage technique so as to see the improvement the learning result that occured in the teaching and learning activities. The result of research shows that the prior to the treatment, the number of students who completed the minimum learning completeness criterion in the Cooling System subject matter is 15 (45%) out of 33. Following the treatment with the integration of the animation learning model and the display learning model, it becomes 18 (55%) and 27 (82%) respectively. The integration of the animation learning model and the display learning model gives a significant contribution to the learning result in the Cooling System subject matter. The implementation of the two integrated learning models makes the learning process active, effective, efficient, and exciting so that it supports a quality teaching and learning. Thus the integration between the animation learning model and the display learning model can improve the learning result in the Cooling System subject matter of the students in Grade XI of Light Vehicle Engineering of Murni Vocational High School 1 of Surakarta in Academic Year 2014/2015. .

PENERAPAN MODEL PEMBELAJARAN KOOPERATIF GROUP INVESTIGATION (GI) DALAM MENINGKATKAN KEAKTIFAN DAN HASIL BELAJAR SISWA KELAS X SMK N 1 MONDOKAN SRAGEN Nurmawan, Wahid
Jurnal Nosel Vol 1, No 4 (2013): April
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The objectives of this research will be : (1) improving the student activity in learning by using Cooperative Learning Group Investigation Model in Vocational Basic Competence Lesson of Light Vehicle Automotive Engineering; (2) understanding the result of teaching learning by using Cooperative Learning Group Investigation Model. This study was a classroom action research method which this research was implemented in two cycles, each cycle consisting of four stages, namely the planning stage, the action stage, the observation stage and reflection phase. Subjects of research were students of tenth grade level in SMK Negeri 1 Mondokan Sragen. The data were collected from teacher and students. The techniques of collecting data that the author used were observation, interview and test. The validity of data used the triangulation of sources. The data were analyzed by using descriptive comparative and analytic of qualitative data. The result of this research showed that the use of cooperative learning group investigation model could improve student of activity and the result of learning in cooling technique learning. It could be seen by the increasing student activity and the result of learning in each cycle. At the initial value average, the average activity is 20.17% and the average learning result is 57.18. After the first cycle of action, student activity increased to 56.53% and average learning result increased to 69.68. While the second cycle, student activity increased to 80.11% and average learning result increased to 77.97.

PENGARUH DIAMETER KAWAT ELEKTROMAGNET PADA SALURAN BAHAN BAKARDAN PEMASANGAN 9POWER PADA KABEL BUSI TERHADAP TORSI DAN DAYA PADA SEPEDA MOTOR YAMAHA JUPITER Z TAHUN 2007 Salatin, Sirrus Sandy
Jurnal Nosel Vol 3, No 2 (2014): October
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The objective of this research were to investigate: (1) the effect of the diameter of electromagnetic coil wire in the fuel line on the torque and power of Yamaha Jupiter Z motorcycle in 2007; (2) the effect of the position of installation and number of 9power of the spark plug wire on the torque and power of Yamaha Jupiter Z motorcycle in 2007; and (3) the simultaneous effect of the diameter of electromagnetic coil wire and the position of installation of 9power into the spark plug wire on the torque and power of Yamaha Jupiter Z motorcycle in 2007. This research used the experiment method. The research was conducted in Mototech (Motorcourse Technology) with the address on South Ring Road, Kemasan, Singosaren, Banguntapan, Bantul, Yogyakarta. The instrument used to measure the torque and power was the dynotest of Dynojet SD325 type. The population of this research was Yamaha Jupiter Z in 2007 motorcycle and the sample of this research was Yamaha Jupiter Z in 2007 with machine number 2P2675042. The data of this reseach were analyzed by using the Two-way Analysis of Variance (ANNOVA). The results of this research were as follows: (1) there was a significant effect of the diameter of electromagnetic coil wire on the torque and power of Yamaha Jupiter Z motorcycle as indicated by the value of maximal torque of 8.82 Nm and the value of maximal power of 6263.88 Nm/s with the diameter of electromagnetic coil wire of 0.20 mm; (2) there was not any effect of the position of installation and number of 9Power of the spark plug wire on the torque. However, there is a significant effect of the position of installation and number of 9Power of the spark plug wire on the power of Yamaha Jupiter Z motorcycle as pointed out by the value of maximal power of 6263.88 Nm/s with all types of treatment of position of installation and number of 9Power; and (3) there was not any simultaneous effect of the diameter of electromagnetic coil wire and the position of installation and number of 9Power of the spark plug wire on the torque. However, there was a significant simultaneous effect of the diameter of electromagnetic coil wire and the position of installation and number of 9Power of the spark plug wire on the power as signified by the value of maximal power of 6263.88 Nm/s with the diameter of electromagnetic coil wire of 0.20 mm and the position of 1 piece of 9Power near the spark plug wire.

ANALISIS TORSI DAN DAYA AKIBAT PEMOTONGAN RAMP POROS BUBUNGAN (CAMSHAFT) PADA SEPEDA MOTOR SUZUKI SHOGUN 125 SP TAHUN 2005 Mahmud, Kurniawan Hidayah
Jurnal Nosel Vol 1, No 2 (2012): October
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Abstract Based on results an analysis of torque and power from the cutting ramp camshaft on motorcycles suzuki shogun 125 sp in 2005, can be concluded that: (1) Maximum torque and power generated using standard camshafts tend to be smaller. The maximum torque produced 6.28 ft-lbs at 6000 rpm rotation, while the maximum power generated is 7.99 ft-lbs at 7500 rpm rotation. Torque produced is small, causing the vehicle less responsive when acceleration, and less power has achieved a maximum speed of the vehicle is lower. (2) Maximum torque and power using modified camshaft (255o duration) tend to be larger. The maximum torque produced 6,98 ft-lbs at 6500 rpm rotation, while the maximum power generated is 9,78 ft-lbs at 8000 rpm rotation. Torque generated large, cause the vehicle more responsive when acceleration, and the power to cause the maximum speed achieved higher vehicle. (3) By using a modified camshaft (255o duration) produces torque and power is better than using a standard exhaust camshafts. The increase in maximum torque after using the modified camshaft of 0,7 ft-lbs, causing the vehicle more responsive when I started running and acceleration. The engine speed to move towards the higher as far as 500 rpm, causing to easily achieved maximum power. Meanwhile, an increase in power after using the modified camshaft, that is equal 1,8 hp, causing a maximum speed causing higher vehicle. The engine speed to move toward a higher rate as far as 500 rpm, causing the maximum speed remains stable.

PENGARUH VARIASI WAKTU PENGAPIAN DAN VOLUME LARUTAN ELEKTROLIT PADA ELEKTROLISER TERHADAP DAYA MESIN SUPRA X 125 TAHUN 2007 DAN PENERAPAN HASIL PENELITIAN PADA MATA KULIAH TEKNIK SEPEDA MOTOR Yulanto, Dwiki Muda
Jurnal Nosel Vol 3, No 4 (2015): April
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The aims of this research are to : (1) Find out the effect of using electrolyzer with variety of electrolyte volume to engine power Supra X 125 in 2007. (2) Find out the effect of modified ignition timing to engine power Supra X 125 in 2007. (3) Find out the effect of comparing electrolyte volume on electrolyzer and modified ignition timing to engine power Supra X 125 in 2007. (4) Find out the biggest engine power Supra X 125 in 2007 from comparing electrolyte volume on electrolyzer and modified ignition timing. This research was used experimental methods. The research was conducted at Mototech Motocourse Technology, Yogyakarta. The equipment that was used to measured engine power was Sportdyno V3.3. The population of this research was Supra X 125 in 2007 and the sample of this research was Supra X 125 in 2007 with JB51E1915937 engine number. This research was analyzed using descriptive data analysis. This research are using 3 variations ignition timing which are magnet with a standard ignition timing (150 BTDC), 20 and 40 advanced ignition timing. Variety of electrolyte volume, which are: 0 cc, 300 cc, and 500 cc volume electrolyte of electrolyzer. Based on the results of this study concluded that: (1) There was an increase engine power result consederation with on standard motorcycle. (2) There was an effect of modified ignition timing to engine power. Ignition timing 170 BTDC to result in engine power as big as 9.21 PS. Ignition timing 190 BTDC to result in engine power as big as 8.81 PS. (3) There was an interaction from comparing electrolyte volume on electrolyzer and modified ignition timing to engine power. Ignition timing 150 BTDC used electrolyzer with 300 cc and 500 cc electrolyte to result in engine power as big as 8.77 PS. Ignition timing 170 BTDC used electrolyzer with 300 cc electrolyte to result in engine power as big as 9.25 PS, although used electrolyzer with 500 cc electrolyte to result in engine power as big as 9.32 PS. Ignition timing 190 BTDC used electrolyzer with 300 cc electrolyte to result in engine power as big as 8.81 PS although used electrolyzer with 500 cc electrolyte to result in engine power as big as 8.94 PS. (4) Maximum engine power as big as 9.32 PS from using electrolyzer with 500 cc electrolyte and ignition timing 170 BTDC.

PENGARUH PENAMBAHAN BENTONIT PADA ABU VULKANIK SEBAGAI PASIR CETAK TERHADAP PERMEABILITAS DAN KEKUATAN TEKAN UNTUK SUPLEMEN MODUL PEMBELAJARAN MATA KULIAH TEKNIK PENGECORAN Multahada, Adib
Jurnal Nosel Vol 4, No 1 (2015): July
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The purpose of this study was to determine: (1) The effect of adding bentonite to the permeability of the vulcanic ash. (2) The effect of adding bentonite to the compressive strength of the vulcanic ash. The reseach was conducted at Manufactur Polyteknik, Ceper, Klaten. The reseach method is experimen method. The indipendent variable in this study is the variation of bentonite with levels of 0%, 5%, 4%, 8%, and 12% and the dependent variable is the permeability and compressive strength. The results of this study were: (1) The addition of bentonite in the molding sand decreased the permeability. (2) The addition of bentonite comes increased compressive strength. (3) Variations bentonite with levels of 0%, 4%, 8% and 12% for successive bentonite 14,07; 13,50; 13,37; dan 10,37 cm3/minute, while for compressive strength of successive contributed 51,33; 57,90; 64,27, and 72,73 KN/m2. The smallest permeability occurs at levels of 12% bentonite is 10,37 cm3/menit and compressive strength variation in the levels of 0% is 51,33 KN/m2, While most the permeability occurred at 0% bentonite are 14,07 cm3/menit and compressive strength in the bentonite levels 12% ie 72,73 KN/m2.

PENGARUH TEMPERATUR QUENCH TERHADAP LAJU KOROSI DAN STRUKTUR MIKRO HASIL PENGELASAN BAJA KEYLOS 50 Priatama, Arya Aji
Jurnal Nosel Vol 3, No 1 (2014): July
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Medium carbon steels is a material commonly used in the industrial world, application of medium carbon steels often have problems that require welding to repair. Welding causes the corrosion resistance of a metal decreases, so that need for post- weld treated, one of the way with quenching. To get the quenching which has good corrosion resistance, need to know the media and the optimal temperature in the quenching process. In the process of quenching, cooling too quickly can cause the brittle nature of the increases thereby increasing the likelihood of cracking in the material which trigger corrosion. This study aims to: ( 1 ) determine the effect of temperature on the cooling medium flow rate of corrosion of steel welds keylos 50. ( 2 ) determine the effect of temperature on the cooling medium steel weld microstructure keylos 50. This research conducted in Inlastek Welding Institute for the welding process and DIII Mechanical Engineering Materials Laboratory UGM for corrosion testing process. The method used experimental method and the type of study is a quantitative study. The number of samples in this study were 4 pieces with 1 piece details without quenching and 3 samples experienced a variaton temperature of quenching media. Corrosion testing was conducted using a weight loss method with 3 pieces for each variation, plus 3 pieces of samples of raw materials , so the total samples for corrosion testing there are 15 pieces. Data analysis techniques in this study is a quantitative descriptive analysis techniques. The results of research have showed that the optimum quench temperature influence on the corrosion rate is quenching temperature is 25-30 ° C it was 273.876 mpy corrosion rate decreased by 15.95% compared with the raw material and the worst quench temperature is 5-10 ° C is 389.943 mpy or an increase of 19.67% compared with the raw material. However, the highest level of corrosion rate occurs in welds without treatment or quenching is 397.518 mpy corrosion rate increased by 21.99% compared with the raw material. These results are due to the air cooling quickly so having a micro structure that is dominated by accicular ferrite and ferrite side plate in weld metal region, then bainite and martensite in the HAZ region, while the water media cooling more slowly because of the heat welding is being held back by the water in a bucket.

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