Pengaruh Metode Ekstraksi Daun Belimbing Wuluh (Averrhoa Bilimbi L.) Sebagai Green Corrosion Inhibitor Terhadap Laju Korosi Baja API 5L Grade B Di Lingkungan 3,5% NaCl

Putra, Yoshua Kusuma (2016) Pengaruh Metode Ekstraksi Daun Belimbing Wuluh (Averrhoa Bilimbi L.) Sebagai Green Corrosion Inhibitor Terhadap Laju Korosi Baja API 5L Grade B Di Lingkungan 3,5% NaCl. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

[img]
Preview
Text
2712100060-Undergraduate-Theses.pdf

Download (2MB) | Preview

Abstract

Korosi adalah penurunan kualitas suatu logam karena bereaksi dengan lingkungan. Korosi dapat dihambat dengan inhibitor organik ekstrak daun belimbing wuluh. Ekstrak dibuat dengan cara ekstraksi maserasi, refluks, dan MAE (Microwave Assisted Extraction). Konsentrasi inhibitor yang ditambahkan adalah 2000 mg/L. Inhibitor ini diaplikasikan pada baja API 5L grade B dalam lingkungan 3,5% NaCl. Beberapa pengujian yang dilakukan untuk mengetahui komposisi baja, kadar tanin, gugus fungsi, laju korosi, efisiensi inhibisi dan mekanisme adalah uji spektrometer, spektrofotometri, FTIR, weight loss, tafel polarisasi, dan EIS. Dari uji weight loss, laju korosi setelah penambahan inhibitor hasil ekstraksi maserasi, refluks, dan MAE sebanyak 0,864 mm/tahun, 0,957 mm/tahun, dan 0,994 mm/tahun dan efisiensi Inhibisi yang dihasilkan masing-masing inhibitor adalah sebesar 55,08%, 48,53%, dan 47,28%. Metode ekstraksi yang paling efisien adalah metode refluks ditinjau lama waktu proses ekstraksi, biaya yang dikeluarkan, rendemen dan kualitas ekstrak, serta efisiensi inhibisi yang dihasilkan. ================================================================================== Corrosion is the destructive to metal quality because of chemical reaction. Corrosion can be handle by adding organic inhibitor such as belimbing wuluh leaves extract. The method of making extract are maceration, reflux, and MAE. Concentration of inhibitor is 2000 mg/L. In this study, inhibitor applied on API 5L Grade B steel in 3,5% NaCl media. Some examination has been performed to identificate the steel composition, tannin’s content, functional group, corrosion rate, inhibition efficiency and mechanism by spectrometer, spektrofotometry, FTIR, weight loss, tafel polarization, and EIS. From weight loss test, the corrosion rate after adding inhibitor as the result of maceration, reflux, and MAE are 0,864 mm/year, 0,957 mm/year, and 0,994 mm/year respectively and also the inhibition efficiency is 55,08%, 48,53%, and 47,28% respectively . The most efficient extraction method is reflux in terms of the lenght of extraction time, cost, yield, the quality of extract, and also inhibition efficiency.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.112 23 Put p
Uncontrolled Keywords: baja karbon rendah; inhibitor organik; ekstraksi; NaCl 3,5%; averrhoa bilimbi l.; low carbon steel, organic inhibitors; extraction
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 22 Jun 2017 06:47
Last Modified: 27 Dec 2018 04:26
URI: http://repository.its.ac.id/id/eprint/41829

Actions (login required)

View Item View Item