title: EKSTRAKSI SENYAWA TANIN DARI DAUN KETAPANG  (Terminalia catappa L.) DAN UJI AKTIVITASNYA  SEBAGAI INHIBITOR KOROSI
creator: 0817011010, Retno Dwi Palupi
subject:  
description: Abstrak    Pada penelitian ini telah dilakukan uji ekstrak tanin dari daun ketapang  (Terminalia catappa) sebagai inhibitor korosi pada baja lunak (mild steel) dalam  medium air laut buatan. Tahapan penelitian yang dilakukan meliputi  pengumpulan dan persiapan sampel, ekstraksi, uji fitokimia tanin dengan  menggunakan FeCl3 dan gelatin. Identifikasi tanin dilakukan menggunakan KLT  dan spektrofotometer FTIR serta spektrofotometer ultraungu-tampak. Uji korosi  dilakukan dengan dua cara, yaitu metode gravimetri dan metode potensiometri.  Analisis morfologi permukaan baja terkorosi dan komposisi baja lunak dilakukan  menggunakan SEM-EDS. Hasil penelitian menunjukkan bahwa berdasarkan uji  fitokimia, identifikasi dengan KLT dan data spektrum FTIR serta ultraungutampak, senyawa hasil ekstraksi tersebut merupakan tanin. Analisis laju korosi  dengan metode kehilangan berat menunjukkan bahwa inhibitor optimum pada  konsentrasi 40% v/v pada paparan 3 hari, cukup efektif dalam menghambat proses  korosi baja lunak dalam medium korosif dengan efisiensi inhibisi sebesar  60,87%, sedangkan analisis laju korosi dengan metode potensiometri  menunjukkan bahwa inhibitor optimum pada konsentrasi 40% v/v pada paparan 10  menit, efektif dalam menghambat proses korosi baja lunak dalam medium korosif  dengan efisiensi inhibisi sebesar 1,98%.  Kata kunci : tanin, terminalia catappa, inhibitor korosi                  Abstract    In this study, the tannins extract from ketapang leaves (Terminalia catappa) had  been tested as a corrosion inhibitor of mild steel in synthetic brine solution with  carbon dioxide saturated at room temperature. Stages of the study were : sample  collection and preparation, extraction, phytochemical test of tannin using FeCl3  and gelatin. Tannins Identifications were performed using TLC, FTIR and  ultraviolet-visible spectrophotometer. Corrosion test were carried out in two  methodes, the gravimetric and potentiometric methods. Analysis of the surface  morphology of corroded steel and mild steel compositions performed using SEMEDS. The results showed that the test based phytochemicals test, identification by  using TLC, spectral data of FTIR and ultraviolet-visible, the extracted compound  is tannin. Analysis of the corrosion by weight loss method showed that the  optimum inhibitor concentration of 40% v/v in 3 days of exposure, is effective in  inhibiting the process of mild steel corrosion in corrosive medium with inhibition  efficiency of 60.87%, while the corrosion analysis with potentiometric method  showed that the optimum inhibitor concentration of 40% v/v at 10 minutes of  exposure, is also quite effective in inhibiting the corrosion of mild steel in the  corrosive medium with inhibition efficiency of1.98%.  Key words : tannin, terminalia catappa, corrosion inhibitor
date: 2012-02-02
type: Artikel
type: PeerReviewed
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identifier: http://digilib.unila.ac.id/14774/1/1.%20Cover%20Skripsi.pdf
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identifier: http://digilib.unila.ac.id/14774/2/2.%20Cover%202.pdf
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identifier: http://digilib.unila.ac.id/14774/3/3.%20Abstract%20%28English%29.pdf
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identifier: http://digilib.unila.ac.id/14774/4/4.%20Abstrak.pdf
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identifier: http://digilib.unila.ac.id/14774/5/5.%20Lembar%20Pengesahan.pdf
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identifier: http://digilib.unila.ac.id/14774/6/6.%20Lembar%20Pengesahan%20Mengesahkan.pdf
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identifier: http://digilib.unila.ac.id/14774/7/7.%20Riwayat%20Hidup.pdf
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identifier: http://digilib.unila.ac.id/14774/8/8.%20Persembahan.pdf
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identifier: http://digilib.unila.ac.id/14774/9/9.%20Motto.pdf
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identifier: http://digilib.unila.ac.id/14774/10/10.%20Sanwacana.pdf
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identifier: http://digilib.unila.ac.id/14774/11/14.%20Pendahuluan.pdf
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identifier: http://digilib.unila.ac.id/14774/12/15.%20Tinjauan%20Pustaka.pdf
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identifier: http://digilib.unila.ac.id/14774/13/16.%20Metodologi%20Penelitian.pdf
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identifier: http://digilib.unila.ac.id/14774/14/17.%20Hasil%20dan%20Pembahasan.pdf
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identifier: http://digilib.unila.ac.id/14774/15/18.%20Kesimpulan%20dan%20Saran.pdf
identifier:   0817011010, Retno Dwi Palupi  (2012) EKSTRAKSI SENYAWA TANIN DARI DAUN KETAPANG (Terminalia catappa L.) DAN UJI AKTIVITASNYA SEBAGAI INHIBITOR KOROSI.  Digital Library.       
relation: http://digilib.unila.ac.id/14774/