Paembonan, Jimmy Sa`pang (2015) Studi analisa campuran green corrosion inhibitor ekstrak sarang semut (myrmecodia pendas) dan daun sirih merah (piper ornatum) terhadap laju korosi pada baja API 5L grade B di lingkungan H2SO4 1M. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Studi analisis pencampuran sarang semut dan sirih merah di
lingkungan H2SO4 1M. telah dilakukan menggunakan metode
weight loss, EIS, Polarisasi, FTIR. Inhibitor sarang semut dan
sirih merah mengandung zat antioksidan yang dapat menghambat
laju korosi.
Spesimen yang digunakan pada penelitian ini adalah
baja API 5L Grade B. Sementara komposisi pencampuran yang
digunakan pada penelitian ini adalah 100% SS : 0% SM, 75% SS
: 25% SM, 50% SS : 50% SM, 25% SS : 75 % SM dan 0% SS :
100% SM.
Hasil pengujian FTIR menunjukan bahwa terbentuk
lapisan pasif akibat ikatan O, H, dan N. Pada uji weight loss
efisiensi tertinggi berada pada komposisi pencampuran 50% SS :
50% SM dengan nilai 52,43%. Hasil uji polarisasi menunjukkan
laju korosi menurun drastis dengan penambahan 50% SS : 50%
SM yakni dari 36,32 mpy menjadi 7,93 mpy akibat adanya
lapisan pasif pada permukaan baja API 5L Grade B. Hasil EIS
menunjukkan adanya tahanan larutan (Rs), tahanan transfer
muatan (Rct), dan CPE. Nilai energi bebas adsorpsi dari
inhibitor campuran sarang semut dan sirih merah sebesar -10,02
kJ/mol dan merupakan adsorpsi fisika.
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The analysis of the mixture of Myrmecodia pendans
and Piper ornatum in H2SO4 1M solution have been studied
by weight loss, EIS, Polarization and FTIR. The
Myrmecodia pendans and Piper ornatum chosen because
they contain antioxidants that can inhibit the corrosion rate.
The specimens used in this study is API 5L Grade B
steel in H2SO4 1M solution. The composition used in this
study was 100% SS : 0% SM, 75% SS : 25% SM, 50% SS :
50% SM, 25% SS : 75 % SM dan 0% SS : 100% SM.
FTIR testing results show that passive layer formed
by O, H and N bonds. In weight loss method shows the
highest efficiency at 50% SS : 50% SM mix composition
with 52,43%. Polarization testing shows the corrosion rate
decreased drastically with the addition of 50% SS : 50% SM
mix composition., i.e. from 36,32 mpy to 7,93 mpy due to
passive layer formed on the steel surface. EIS results
showed resistance solution (Rs), charge transfer resistance
(Rct) and CPE. The adsorption free energy value of the
mixture of Myrmecodia pendans and Piper ornatum is -
10,02 kJ/mol and it’s a physical adsorption.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.112 23 Pae s |
| Uncontrolled Keywords: | baja karbon; bio inhibitor; sarang semut; sirih merah; H2SO4 |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 24 Oct 2018 02:36 |
| Last Modified: | 24 Oct 2018 02:36 |
| URI: | http://repository.its.ac.id/id/eprint/59911 |
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