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Jurnal Teori dan Aplikasi Fisika
Published by Universitas Lampung
ISSN : 2303016X     EISSN : 25491156     DOI : https://doi.org/10.23960/jtaf.v14i01
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics
We invite authors to submit manuscripts of up to 10 pages, prepared in accordance with the author guidelines. The scope of this journal includes, but is not limited to, the following fields: 1. Theoretical Physics Classical Mechanics Electromagnetics Thermodynamics Statistical Mechanics Quantum Mechanics Theory of Relativity Quantum Gravity Astrophysics Cosmology 2. Earth Physics (Geophysics) Geothermal Geoelectrics Seismics Geomagnetics 3. Materials Physics Nanomaterials Metals and Corrosion Magnetic Materials Thin Films Photocatalysts/Catalysts Semiconductors Superconductors Ceramics Polymers 4. Electronics and Instrumentation Sensors Biomedical Instrumentation Agricultural Instrumentation Environmental Instrumentation Biophysics Computational Physics Lasers 5. Nuclear Physics Reactor Safety Neutronic Analysis Fuel and Waste Management
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 395 Documents
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ANALISIS LAJU KOROSI ELEKTRODE BAHAN Cu - Zn DENGAN METODE SACRIFICIAL ANODE PADA SISTEM ENERGI LISTRIK ALTERNATIF BERBASIS AIR LAUT Gurum Ahmad Pauzi; Latifah Kamalia; Sri Wahyu Suciati
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.187

Abstract

In this study, the addition of aluminum (Al) and magnesium (Mg) at the zinc (Zn) electrode as the sacrifice anode in an alternative sea-based electrical energy system was carried out. The sacrifice anode method is used as a way to prevent the corrosion of Zn electrodes. There are 3 types of electrode treatments, namely Cu-Zn, Cu-ZnAl, and Cu-ZnMg. The tool is designed to have 20 cells arranged in series and given a load of 3 Watt LED lights. Tool testing is carried out for 72 hours with electrolyte replacement every 24 hours. The measurement results showed that the Cu-ZnMg electrode produced the highest power output compared to the Cu-Zn and Cu-ZnAl electrodes. The maximum value of power from the Cu-ZnMg electrode is 125.71 mW while the electrodes of Cu-Zn and Cu-ZnAl have maximum power values of 49.49 mW and 52.48 mW respectively. The value of the intensity of the light generated from the instrument shows that the greater the power released, the higher the intensity of light. The lowest corrosion rate was generated by the Cu-ZnMg electrode of 0.079 mm/year after 72 hours of testing. This shows that the addition of sacrificial anode metal with a higher potential electrode value can produce higher and longer electrical energy and a lower corrosion rate
ANALISIS KARAKTERISTIK ELEKTRIK AIR LAUT TERSARING SEBAGAI SUMBER ENERGI ALTERNATIF BERKELANJUTAN (SUSTAINABLE ENERGY) Edward Jannert; Gurum Ahmad Pauzi; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.188

Abstract

The electrical characteristics of filtered seawater can be determined by using Cu-Zn electrode pairs. Seawater is filtered by using a 1 micron sediment filter. Measurement of electrical characteristics of water is carried out using a 3 watt DC LED load and when the load is removed. The electrolyte cell consists of 40 cells, which are arranged in series and parallel with 300 ml per cell. Tool testing is carried out for 144 hours with 6 times electrolyte filling every 24 hours. The test results show that the longer the tool is used, the more electrical characteristics produced will be decreasing. The produce of maximum voltage (Vbl) by seawater is not filtered with a series of 31.5 V. The produce of maximum power (P) by seawater is not filtered with a series of 101.1 mW. The produce of maximum illumination by seawater is not filtered with a series of 426.4 Lux, the duration of the light is 8 hours. Despite the produce of maximum illumination by filtered seawater with a series of 319.7 Lux series, the duration of the light is 11 hours.
Analisis Termal-hidrolik Reaktor Cepat Berpendingin Gas (Gas Cooled Fast Reactor) Menggunakan Metode Runge Kutta Adeliya Ayu Anggraini; Yanti Yulianti; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.189

Abstract

Pengaruh Konsentrasi Ekstrak Kulit Buah Maja (Aegle Marmelos (l.) Corea) terhadap Laju Korosi Baja Karbon API 5L pada Medium NaCl 3% dan H2SO4 3% amilia rasitiani; Ediman Ginting; Pulung Karo karo
Jurnal Teori dan Aplikasi Fisika Vol. 6 No. 2 (2018): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v6i2.190

Abstract

Skrinning Fitokimia Ekstrak Daun Sirsak (Annona muricata) Dan Pengaruhnya Terhadap Laju Korosi Baja Karbon ST 37 Leni Rumiyanti; Amilia Rasitiani; Ediman Giting Suka
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.194

Abstract

Research has been conducted on a phytochemical screening of soursop leaf extract (Annona muricata) and its effect on the corrosion rate of ST 37 carbon steel. Extraction of soursop leaves was carried out by the maceration method, while corrosion rate testing was carried out by weight loss method. ST 37 carbon immersion was carried out for 10 days with 7 variations of concentration, namely 0%, 5%, 10%, 15%, 20%, 25%, 30%, and 35%. The results of phytochemical screening showed that the soursop leaf extract contained saponins, triterpenoids, tannins, alkaloids, and flavonoids. The greatest corrosion rate was obtained at a concentration of 0%, which was 1.3 x 104 mm / y, while the lowest corrosion rate was at a concentration of 30%, which was 0.032 x 104 mm / y. The greatest corrosion inhibition efficiency occurred at a concentration of 35% at 97.53%. Based on the results of the reaserch, it can be concluded that the higher the concentration of soursop leaf extract used, the lower the corrosion rate and the higher the inhibition efficiency of the corrosion
Analisis Jeruk dan Kulit Jeruk sebagai Larutan Elektrolit terhadap Kelistrikan Sel Volta suci asmarani; Sri Wahyu Suciyati; Amir Supriyanto
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.195

Abstract

It has been conducted a research to analyze Citrus sp as voltaic cell electrolyte liquid based on pH and fruit condition on its electrical properties. The research objective was to utilize citrus sp waste as an alternative source of electrical energy bio-battery. The materials required consists of a copper electrode (Cu), zinc (Zn), electrolyte liquid (50ml) from lime, lemon, medan orange and pontianak orange. Electrode copper Cu used as cathode and zinc (Zn) as anode. The conditions of liquid variations fresh, fermentation 48 hours, and putridity. The acidity level of the liquid was measured using pH meter. The best result of measuring without a load was found in putrid liquid of lemon, which was 19,36 V. Measurement using 1000? of load was obtained best result in the 48 hours fermentation of lime liquid, that are 2,369 mW, 0,762 mA and 3,11 V. For the measuring with additional LED, the best results are the liquid of lemon dan lime with permentation 48hours, with maximum 9 LED. The results are 7,144mW and 8,534 mW.
Inhibisi Korosi Ekstrak Buah Pinang (Areca catechu L.) Sebagai Penghambat Laju Korosi Pada Baja Karbon Rendah C-Mn Steel dengan Medium Korosif HCl dan NaCl nika khumaidah; Ediman Ginting Suka; Syafriadi Syafriadi
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.196

Abstract

Corrosion inhibition of areca nut extract (Areca catechu) as the resistor of corrosion rate in low carbon steel with HCl and NaCl corrosive medium concentrated at 3% had been reasearched. The C-Mn steel corrosion rate was examined during a 96 hours of submersion with and without the addition of areca nut extract with the concentration rate at 10%, 15%, and 20% respectively. The examination was done with the weight loss method. The result of the research shows that the use of higher the concentration of areca nut extract resulted in the decrease of corrosion rate and the increase of corrosion inhibition capability. The highest rate of corrosion effectiveness was found in the 20% concentration in both HCl and NaCl with the rate of 86,06% and 85,62% respectively. The result of X-Ray diffraction (XRD) characterization showed that the phase formed was pure Fe. Scanning Electron Microscopy (SEM) characterization showed uneven clusters with smaller size. Holes and cracks were not formed that the corrosion rate was lower compared to the sample without inhibitor addition. The characterization Energy Dispersive Spectroscopy (EDS) in the sample without inhibitor showed the presence of Cl substance.
Pengaruh Temperatur terhadap Karakterisasi Klinker Semen dengan Substitusi 20% Batu Basalt terhadap Massa Batu Kapur dan 20% Batubara terhadap Massa Total sebagai Reduktor Leni Rumiyanti; Yuliana Sari; Muhammad Amin
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.197

Abstract

Pengaruh Penambahan Silika (SiO2) Sekam Padi Terhadap Karakteristik Mikrostruktur dan Struktur Aspal dengan Perbandingan Massa 1:0 ; 1:1,5 ; 1:1,6 dan 1:1,7 Letia Oktri Diana; Simon Sembiring; Rudi T.M Situmeang
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.198

Abstract

Synthesis and characterization of silica rice husk blend asphalt was carried out with a mass ratio of 1;0; 1:1,5; 1:1,6 and 1:1,7 respectively. Rice husk was prepared by sol-gel method as a raw material of silica. Asphalt and silica is mixed by using the solid-sate method, which is heated with a temperature of 110 oC for 4 hours. This study was revealed to investigate the effect of the addition of silica from rice husk on microstructure and asphalt structure. SEM results show the morphology of the asphalt surface without addition of silica which transforms elongated folds and after addition of silica shows uncertain granules more likely seems clusters with grain size (1:1,5 = 4,298 ?m, 1:1,6 = 3,103 ?m and 1:1,7 = 5,328 ?m) respectively. The XRD results show asphaltene amorphous phase in the asphalt sample with two peaks at 2?= 18,90? and 2?= 42?. Furthermore, the addition of silica with asphalt able to modify two asphaltene peaks into carbon and silica amorphous peaks.
Pengaruh Penambahan Inhibitor Ekstrak Kulit Kakao (Theobroma cacao) terhadap Laju Korosi Baja Api 5 L pada Medium NaCl 3% dan HCl 3% Liyana Mardova; Ediman Ginting Suka; Simon Sembiring
Jurnal Teori dan Aplikasi Fisika Vol. 7 No. 1 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i1.199

Abstract

Corrosion inhibition of low carbon API 5L by cocoa peel extract (Theobroma cacao) in corrosive medium of natrium chloride and hydrochloride acid of 3% has been investigated. The test was carried out by weight loss method. Corrosion rate was tested on low carbon steel with and without the tea leaves extract for 4 days with concentration of 0, 500, 1000, and 1500 ppm. The research result show that the more percentage of cocoa peels inhibitor extract, the lower corrosion rate so that capability of inhibition will increase. The biggest inhibition efficiency corrosion occurred at concentrations of 1500 ppm in NaCl and HCl with efficiency of 93,39% and 73,6% respectively. The X-Ray Diffraction (XRD) result shows that the phase was Fe. Scanning Electron Microscopy (SEM) shows that the grain size and cluster is bigger, hole and crack also shows is lower of with inhibitor than without inhibitor. Energy Dispersive Spectroscopy (EDS) shows that there is Cl element on sample without inhibitor.

Page 18 of 40 | Total Record : 395

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