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.
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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.
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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 > 28201-(S1) Undergraduate Thesis |
| Depositing User: | 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 |
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