Putra, Mahendra Kresna (2017) Pengaruh Ekstrak Daun Teh Terhadap Ketahanan Korosi Baja Karbon Di Lingkungan Asam Kuat Dan Asam Lemah. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dalam lingkungan bisnis modern, perusahaan yang sukses tidak dapat mentolerir kegagalan korosi yang besar, terutama yang menyebabkan kecelakaan, dan kematian personel, penghentian tidak terjadwal dan kontaminasi lingkungan. Perpipaan adalah salah satu jenis korosi yang banyak menjadi subjek korosi. Termasuk jaringan pipa minyak dan gas yang kebanyakan korosi terjadi dari dalam pipa. Korosi tidak dapat dicegah tetapi lajunya dapat dikurangi. Kandungan zat antioksidan seperti polifenol, tanin, alkaloid, saponin, minyak atsiri dan asam amino mempunyai banyak unsur N, O, P, S yang dapat membentuk senyawa kompleks sulit larut dengan ion logam yang mampu menghambat korosi pada logam. Pada penelitian ini digunakan ekstrak daun teh (camelia sinensis) karena tanaman teh selain harganya relatif murah, mudah didapat, daun teh juga mempunyai kandungan tanin yang besar yaitu sekitar 7 % - 15% dan tidak beracun. Larutan elektrolit yang digunakan pada penelitian ini adalah H2SO4 dan CH3COOH pH 3. Hasil pengujian FTIR menunjukkan adanya gugus fungsi tanin pada permukaan baja yang telah diberikan inhibitor. Hasil pengujian weight loss memperlihatkan bahwa nilai laju korosi terendah didapat pada konsentrasi 300 ppm dalam lingkungan asam kuat sebesar 0,05 mm/y dengan efisiensi inhibisi sebesar 87,82%. Sedangkan dalam lingkungan asam lemah laju korosi terendah didapatkan saat konsentrasi 900 ppm sebesar 1,1 mm/y dengan efisiensi inhibisi sebesar 60,72%. Pada pengujian XRD pada lingkungan asam kuat ditemukan adanya senyawa Fe2O3 sebagai produk korosi, sedangkan pada lingkungan asam lemah ditemukan Fe3+(OH) sebagai produk korosi. inhibitor daun teh bekerja secara adsorpsi pada permukaan baja API 5L dengan membentuk senywa kompleks sehingga menghasilkan lapisan tipis yang dapat menghambat laju korosi. =================================================================
In modern business environments, successful companies can not tolerate major corrosion failures, especially those that cause accidents, and deaths of personnel, unscheduled termination and environmental contamination. Piping is one type of corrosion that many become the subject of corrosion. Including oil and gas pipelines that mostly corrosion occurs from inside the pipe. Corrosion can not be prevented but it can be reduced. The content of antioxidants such as polyphenols, tannins, alkaloids, saponins, essential oils and amino acids has many elements of N, O, P, S that can form complex soluble compounds with metal ions capable of inhibiting corrosion in metals. In this study used tea leaf extract (camelia sinensis) because tea plants in addition to the relatively cheap price, easy to obtain, tea leaves also have a large tannin content of about 7% - 15% and not toxic. The electrolyte solution used in this study was H2SO4 and CH3COOH pH 3. FTIR test results showed the presence of tannin functional groups on steel surfaces that had been given inhibitors. The result of weight loss test showed that the lowest corrosion rate was obtained at a concentration of 300 ppm in a strong acid environment of 0.05 mm / y with an inhibition efficiency of 87.82%. While in the weak acid environment the lowest corrosion rate was obtained when the concentration of 900 ppm was 1.1 mm / y with the inhibition efficiency of 60.72%. In the XRD test on the strong acid environment found the Fe2O3 compound as a corrosion product, whereas in the weak acid environment found Fe3+(OH) as a corrosion product. The tea leaf inhibitor works adsorptively on the 5L API surfaces by forming complex compounds to produce a thin film which can inhibit corrosion rate.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 620.112 23 Put p |
| Uncontrolled Keywords: | Acid, Tea Leaf Extract Inhibitor, Corrosion, H2SO4, CH3COOH, Antioxidant, Tannin, Tanin, Inhibitor Ekstrak Daun Teh, asam, korosi, antioksidan |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Mahendra Kresna Putra |
| Date Deposited: | 02 Nov 2017 07:35 |
| Last Modified: | 05 Mar 2019 06:11 |
| URI: | http://repository.its.ac.id/id/eprint/42481 |
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