IDAWATI PANJAITAN, 1617041047 (2021) ANALISIS LAJU KOROSI BAJA St37 MENGGUNAKAN INHIBITOR EKSTRAK THEOBROMA CACAO DENGAN VARIASI KONSENTRASI 0%, 4% dan 8% DALAM MEDIUM KOROSIF HCl 3% PADA SUHU 100 C. FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM, UNIVERSITAS LAMPUNG.
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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)
ABSTRACT CORROSION RATE ANALYSIS OF ST37 STEEL USING INHIBITOR THEOBROMA CACAO EXTRACT WITH VARIATIONS 0%, 4% and 8% CONCENTRATION IN MEDIUM 3% HCL CORROSION AT 100 oC By Idawati Panjaitan Research has been carried out on the analysis of the corrosion rate of St37 steel using the theobroma cacao extract inhibitor with various concentrations of 0%, 4% and 8% in 3% HCl corrosive medium at 100 oC. The effectiveness of inhibitors derived from cocoa leaves on the corrosion of St37 steel in HCl solution has been investigated using the weight loss method, X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Spectroscopy (EDS). Based on the results of research that has been done, the higher the immersion temperature, the greater the corrosion rate on steel without inhibitors. The highest effectiveness of cocoa theobroma extract was found at a concentration of 8% at a temperature of 100 oC with an efficiency of 88.91%. The results of XRD analysis after the addition of the inhibitor of theobroma cacao extract reduced the peaks to a pure Fe phase. From the three sample analysis processes and the calculation of the corrosion rate, it was found that the inhibitor of cocoa leaf extract (theobroma cacao) was effective in inhibiting the corrosion rate of St37 steel. Key words : St37 steel, cocoa leaf extract, corrosion inhibitor and HCl. ii ii ABSTRAK ANALISIS LAJU KOROSI BAJA St37 MENGGUNAKAN INHIBITOR EKSTRAK THEOBROMA CACAO DENGAN VARIASI KONSENTRASI 0%, 4% dan 8% DALAM MEDIUM KOROSIF HCL 3% PADA SUHU 100 oC Oleh Idawati Panjaitan Telah dilakukan penelitian tentang analisis laju korosi baja St37 menggunakan inhibitor ekstrak theobroma cacao dengan variasi konsentrasi 0%, 4% dan 8% dalam medium korosif HCl 3% pada suhu 100 oC. Efektivitas inhibitor yang berasal dari daun kakao pada korosi baja St37 dalam larutan HCl telah diteliti menggunakan metode kehilangan berat, X-Ray Diffraction (XRD), dan Scanning Elektron Microscopy (SEM) yang dilengkapi dengan Energy Dispersive Spectroscopy (EDS). Berdasarkan hasil penelitian yang telah dilakukan semakin tinggi suhu perendaman semakin besar laju korosi pada baja tanpa inhibitor. Efektivitas tertinggi ekstrak theobroma kakao terdapat pada konsentrasi 8% pada suhu 100 oC dengan efesiensi 88,91 %. Hasil analisis XRD setelah penambahan inhibitor ekstrak theobroma cacao puncak-puncak berkurang, menjadi fasa Fe murni. Dari ketiga proses analisis sampel dan perhitungan laju korosi didapatkan bahwa inhibitor ekstrak daun cokelat (theobroma kakao) efektif dalam menginhibisi laju korosi pada baja St37. Kata kunci : Baja St37, ekstrak daun cokelat, inhibitor korosi dan HCl.
| Jenis Karya Akhir: | Skripsi |
|---|---|
| Subyek: | 500 ilmu pengetahuan alam dan matematika > 530 Fisika |
| Program Studi: | FAKULTAS MIPA > Prodi Fisika |
| Pengguna Deposit: | UPT . Teti Novianti |
| Date Deposited: | 28 Apr 2022 01:20 |
| Terakhir diubah: | 28 Apr 2022 01:20 |
| URI: | http://digilib.unila.ac.id/id/eprint/60607 |
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