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All Journal Journal of Energy, Material, and Instrumentation Technology
Yanti Yulianti
Jurusan Fisika, Universitas Lampung, Bandar Lampung, Indonesia, 35141
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Efek NaOH pada Pembentukan Nano ZnO Metode Hidrotermal Rahma Fauza; Posman Manurung; Yanti Yulianti
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.v2i3.146

Abstract

Hydrothermal methods have been developed for the manufacture of ZnO. This study aims to find out the effects of variation on the chemical composition and structure of nanoZnO, the nanoZnO phase formed and the nanoZnO particle size formed. The NaOH variation used is 1; 2; 3; and 4 grams. The characteristics used are X-Ray Diffactions (XRD) and Scanning Electron Microscopy (SEM). The XRD characterization results show that the diffraction peaks correspond to standard databases and show wurtzite phases with hexagon structures. The results of SEM characterization showed that the mean measurement of ZnO particles and the error value in the 1 gram variation was 67 ± 3 nm, while the 3 gram variation was 76 ± 6 nm.
Pengaruh Inhibitor Ekstrak Daun Inai (Lawsonia inermis L) Terhadap Laju Korosi Baja St37 dalam Larutan HCl 3% Oricha Mutia Rani; Ediman Ginting Suka; Yanti Yulianti
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.v2i3.147

Abstract

Henna leaves extract (Lawsonia inermis L) is used as a corrosion inhibitor in St37 steel soaked in 3% HCl corrosive medium. To find out the effect of inhibitor concentration on the corrosion rate of steel, the variation of inhibitor concentration is 0, 3, 5, 7 and 9%. Corrosion rate testing is done by mass loss method. Corrosion rate was tested on low carbon steel with and without inhibition of henna extract for 6 days. The results showed that the greater the concentration of inhibitor of henna extract used, the corrosion rate would decrease and the ability to inhibit corrosion would increase. The greatest corrosion efficiency occurred at a concentration of 9% with an efficiency of 88.84%. The results of X-Ray Diffraction (XRD) characterization showed that the phase formed was pure iron (Fe). Secondary Electron Microscopy (SEM) characterization showed uneven clusters and smaller sizes, holes and cracks were also less with the addition of inhibitory leaves extract than without the addition of inhibitory leaves extract. This result is reinforced by the percentage of corrosion products shown in the results of the characterization of Energy Dispersive Spectroscopy (EDS).
Co-Authors Ediman Ginting Suka Oricha Mutia Rani Posman Manurung Rahma Fauza