Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Journal of Energy, Material, and Instrumentation Technology
Agus Riyanto
Jurusan Fisika, Universitas Lampung, Bandar Lampung, Indonesia, 35141
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Analisis Laju Korosi Baja St37 dengan Inhibitor Ekstrak Daun Jambu Biji dalam Medium Korosif HCl 3% pada Suhu 80°C dan 100°C Putri Vidia Citra; Ediman Ginting Suka; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 3 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v2i3.148

Abstract

This study aims to determine the effectiveness of guava leaf extract as an inhibitor of St37 steel in 3% HCl corrosive medium. Weight reduction method is used to determine the value of the resulting corrosion rate. Soaking of St37 steel at 80 ° C and 100 ° C was carried out with variations in the addition of 0%, 4%, and 8% inhibitor concentrations. The results show the lowest corrosion rate is at a concentration of 8% at an immersion temperature of 80 ° C with an inhibitor efficiency value of 84.07%. Fourier transform infra red (FTIR) analysis results showed that tannin content was found in guava leaf extract. The x-ray diffraction (XRD) results show that the phase formed is pure Fe phase. The results of scanning electron microscopy (SEM) show the presence of lumps on steel surfaces of various sizes which are the product of corrosion. This is reinforced by the results of energy dispersive spectroscopy. (EDS) which shows that the increasing number of lumps on the steel surface leaves fewer Fe elements and more FeO corrosion products.
Karakteristik Struktur Dan Fungsional Aspal Komposit dengan Perbandingan 85%:15% Samuel Nugroho Putra; Simon Sembiring; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 4 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v2i4.149

Abstract

Synthesis and characterization of rice husk and asphalt silica composites was carried out with a ratio of 85%: 15%. Silica synthesis from rice husk was carried out by the sol-gel method. The materials used in this study were rice husks, asphalt, distilled water, gasoline, NaOH and HNO3. Then the silica and asphalt according to the comparison is set at 110oC. This study aims to look at the structural characteristics, functionality and physical properties, namely water content and thickness development of the sample. Based on the research that has been done, it can be concluded that from the results of XRD characterization the samples have silica and amorphous carbon structures, then based on FTIR characterization shows the -OH (hydroxil) functional groups occur at wave number 3524 cm-1, the hydroxide metal Si-OH (silanol) is oxidized into Si - O - Si and Si - O are formed at wave numbers 1084 cm-1, 810 cm-1 and 462 cm-1 and the formation of the C-H and C=O function group occurs at wave numbers 2923 cm-1 and 2361 cm-1. Then test the physical properties of the water content of 7.642% with a change in thickness development of 4.783%.
Co-Authors Ediman Ginting Suka Putri Vidia Citra Samuel Nugroho Putra Simon Sembiring