Farochi, M. Bagus Fatchul (2014) Pengaruh pemambahan ekstrak daun salam terhadap laju korosi pada baja API 5L grade B dilingkungan 3,5% NaCl dan H2SO4 1M. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi merupakan degradasi mutu dari suatu material. Pada industri minyak dan gas, korosi sangat rawan menyerang pada sistem pipelines. Inhibitor korosi dapat menghambat suatu proses korosi. Terdapat dua macam inhibitor korosi jika dilihat dari bahan dasarnya, yaitu inhibitor organik (bioinhibitor) dan inhibitor anorganik. Namun, penggunaan inhibitor anorganik tidak ramah lingkungan dan juga kurang ekonomis. Tujuan dari penelitian ini adalah untuk mempelajari pengaruh ekstrak daun salam yang mengandung antioksidan sebagai inhibitor dalam media korosif H2SO4dan NaCl.
Dalam penelitian ini digunakan baja karbon API 5L Grade B dengan media korosif H2SO4 1 M dan NaCl 3,5 % dengan variasi konsentrasi dari ekstrak daun salam 0 mg/L, 100 mg/L, 200 mg/L, 300 mg/L, 400 mg/L dan 500 mg/L.Untuk mengetahui kandungan flavonoid yang merupakan senyawa fenol yang berperan sebagai antioksidan dilakukan uji flavonoid total. Efektivitas penggunaan inhibitor daun salam akan diketahui melalui beberapa pengujian yaitu Uji Weight Loss, Uji Electrochemical Impedance Spectroscopy dan Uji Fourier Transform Infrared Spectroscopy untuk mengetahui apakah ekstrak daun salam dapat teradsorpsi pada bja API 5L grade B.
Hasil pengujian menunjukkan bahwa ekstrak daun salam mengandung senyawa flavonoid yang mampu menghambat laju korosi yang terjadi pada baja API 5L grade B saat digunakan sebagai inhibitor korosi. Laju korosi menurun dari 4,7155 mpy saat tidak ditambahkan inhibitor menjadi 0,7333 mpy saat ditambahkan 300 mg/L pada media NaCl 3.5% dan 2773,3669 mpy saat tidak ditambahkan inhibitor menjadi 1162,3593 mpy setelah ditambahkan 300 mg/L.
Kata Kunci : daun salam, antioksidan, media korosif, ,API 5L Grade B
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Corrosion is the degradation of the quality of a material. In the oil and gas industry, are very prone to corrosion attack on the system of pipelines. Corrosion inhibitors can inhibit the corrosion process. There are two kinds of corrosion inhibitors when viewed from the basic ingredients, namely organic inhibitors (bioinhibitor) and inorganic inhibitors. However, the use of inorganic inhibitors are not environmentally friendly and also less economical. The purpose of this research is to study the effect of salam leaves’s extracts containing antioxidants as inhibitors in the corrosive media H2SO4dan NaCl.
This study used carbon steel API 5L Grade B with corrosive media H2SO4 1 M NaCl and 3.5% with variation of the concentration of leaves extract 0 mg / L, 100 mg / L, 200 mg / L, 300 mg / L, 400 mg / L and 500 mg / L. For know flavonoid phenols are compounds that act as antioxidants total flavonoids tested. The effectiveness of the use of inhibitors of leaves will be known through some testing that Weight Loss Test, Test and Test Electrochemical Impedance Spectroscopy Fourier Transform Infrared Spectroscopy to determine whether extracts of leaves can be adsorbed on the steel API 5L grade B.
The results showed that the leaves extract contains flavonoids that can inhibit corrosion rate occurs in steel API 5L Grade B when used as a corrosion inhibitor. Corrosion rate decreased from 4.7155 mpy when no inhibitor was added into the current 0.7333 mpy added 300 mg / L in 3.5% NaCl medium and 2773.3669 mpy when no inhibitor added into 1162.3593 mpy after adding 300 mg / L.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.112 2 Far p |
| Uncontrolled Keywords: | Daun salam; antioksidan; media korosif; API 5L; grade B |
| 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: | - Taufiq Rahmanu |
| Date Deposited: | 10 Jul 2019 02:57 |
| Last Modified: | 10 Jul 2019 02:57 |
| URI: | http://repository.its.ac.id/id/eprint/63784 |
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