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

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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).
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.
Co-Authors Agus Riyanto Oricha Mutia Rani Putri Vidia Citra Yanti Yulianti