Amalia, Indah (2016) Pengaruh Variasi Konsentrasi Ekstrak Daun Jambu Biji (Psidium Guajava) Dan Daun Cengkeh (Syizigium Aromaticum) Sebagai Inhibitor Organik Pada Api 5l Grade B Di Lingkungan Nacl 3,5% Ph4. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penggunaan inhibitor organik menjadi alternatif baru untuk proteksi korosi karena bersifat biodegradable, biaya murah, dan ramah lingkungan. Inhibitor organik yang digunakan adalah ekstrak daun jambu biji dengan konsentrasi 392, 785, 1188, 1570 dan 1591 ppm dan ekstrak daun cengkeh dengan konsentrasi 1536, 1736, 1923, 2113 dan 2304 ppm. Dari hasil pengujian weightloss, konsentrasi optimum pada ekstrak daun jambu biji berada pada konsentrasi 1188 ppm dengan laju korosi 2,01 mpy dan efisiensi 64,08% sedangkan ekstrak daun cengkeh konsentrasi optimumnya berada pada konsentrasi 2304 ppm dengan laju korosi 4,07 mpy dengan efisiensi 45,32%. FTIR menunjukkan gugus – gugus fungsi yang berada di dalam inhibitor dan diperkuat dengan hasil GCMS untuk menunjukkan senyawa eugenol pada daun cengkeh dan pengujian kandungan tanin untuk mengetahui kandungan senyawa tanin yang terdapat dalam esktrak daun jambu biji. Pengujian FTIR juga menunjukkan bahwa gugus – gugus fungsi pada inhibitor menempel pada permukaan sampel ketika sampel di rendam. Mekanisme adsorpsi dari kedua inhibitor adalah physical adsorption dengan nilai ΔGads pada inhibitor ekstrak daun jambu biji sebesar -6,6524 kJ/mol dan -10,789 kJ/mol untuk inhibitor ekstrak daun cengkeh. EIS menunjukkan adanya peningkatan nilai tahanan polarisasi pada larutan yang diberi penambahan inhibitor dan nilai dari CPE menurun yang menunjukkan bahwa terjadi pembentukan lapisan protektif. Kedua jenis inhibitor ini termasuk dalam jenis inhibitor campuran (mix type inhibitor).
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The use of green corrosion inhibitors naturally become a new alternative for corrosion protection because it is biodegradable, low cost, and environmentally friendly. Organic inhibitors that used are guava leaf extract at concentrations of 392, 785, 1188, 1570 and 1591 ppm and clove leaf extract with a concentration of 1536, 1736, 1923, 2113 and 2304 ppm. From weight loss, the optimum concentration in guava leaf extract is at 1188 ppm to 2.01 mpy corrosion rate and efficiency of 64.08% while the clove leaf extract optimum concentration is at a concentration of 2304 ppm to 4.07 mpy corrosion rate with an efficiency of 45.32%. FTIR showed groups - the functional groups inside inhibitors and supported by GCMS results to obtain the eugenol compound in clove leaf and tannins test to determine the composition of tannin in the guava leaf extract. FTIR testing also showed that the inhibitor functional groups attached to the surface of the sample when the sample was soaked. Adsorption mechanism of inhibitors are physical adsorption with an ΔGads in guava leaf extract is -6.6524 kJ/mol and -10.789 kJ/mol for inhibitors of clove leaf extract. EIS shows an increase in the value of polarization resistance on the addition of inhibitor-treated solution and the value of CPE decrease which indicates that the formation of a protective coating. The type of inhibitors are mixed-type inhibitor.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.112 23 Ama p |
| Uncontrolled Keywords: | inhibitor daun jambu biji, inhibitor daun cengkeh, API 5L grade B, NaCl 3,5% pH4, mix-typed inhibitor |
| Subjects: | T Technology > TN Mining engineering. Metallurgy T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment T Technology > TP Chemical technology |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Users 13 not found. |
| Date Deposited: | 19 Sep 2017 05:04 |
| Last Modified: | 19 Sep 2017 05:04 |
| URI: | http://repository.its.ac.id/id/eprint/48860 |
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