PENETAPAN KADAR TANIN DAN UJI KEMAMPUAN EKSTRAK DAUN GAMAL (Gliricidia sepium) SEBAGAI INHIBITOR KOROSI LOGAM TEMBAGA (Cu)
-
Titus Lapailaka(1*)
-
Tri O. N. Edamuli(2)
-
Luther Kadang(3)
(*) Corresponding Author
Abstract
A study has been carried out to determine the levels of tannins and the effectiveness of Gamal leaf extract (Gliricidia sepium) as a corrosion inhibitor for copper (Cu). The objectives of this research were to determine the tannin content in gamal leaf extract, observe the corrosion rate of copper with varying concentrations of the extract, identify the optimal soaking time, and evaluate the inhibitory properties of gamal leaf extract on copper corrosion. Gamal leaf extract was obtained through maceration and confirmed to contain tannins using phytochemical tests. The corrosion rate and inhibition efficiency were measured using the weight loss method. The results indicated that the gamal leaf extract contained 40.42% tannins. A concentration of 10% of gamal leaf extract reduced the corrosion rate of copper in a NaCl solution, demonstrating the highest inhibition efficiency at 80.16%. It was observed that increasing the concentration of the inhibitor and prolonging the immersion time led to lower corrosion rates. In the case of a NaCl solution as the corrosion medium, the highest concentration of gamal leaf extract used was 10%, and the longest immersion time was 9 days, resulting in a corrosion rate of 0.0593 cm/year.
Downloads
References
2. Pattireuw, K. J., Rauf, F. A. & Lumintang, R. ANALISIS LAJU KOROSI PADA BAJA KARBON DENGAN MENGGUNAKAN AIR LAUT DAN H 2 SO 4. (2013).
3. Setiawan, S. & Nasrulloh, Y. SINTESIS GREEN INHIBITOR EKSTRAK DAUN TREMBESI (Samanea saman (Jacq.) Merr) SEBAGAI PEREDUKSI LAJU KOROSI LOGAM BAJA KARBON. Khazanah J. Mhs. 12, (2020).
4. Haryono, G., Sugiarto, B. & Farid, H. Ekstrak Bahan Alam sebagai Inhibitor Korosi. Pros. Semin. Nas. Tek. Kim. “Kejuangan” Pengemb. Teknol. Kim. untuk Pengolah. Sumber Daya Alam Indones. 1–6 (2010).
5. Akharaiyi, F. C., Boboye, B. & Adetuyi, F. C. Antibacterial, phytochemical and antioxidant activities of the leaf extracts of Gliricidia sepium and Spathodea campanulata. World Appl. Sci. J. 16, 523–530 (2012).
6. Artaningsih, N. L. B., Habibah, N. & Nyoman, M. Aktivitas Antibakteri Ekstrak Etanol Daun Gamal (Gliricidia sepium) pada Berbagai Konsentrasi terhadap Pertumbuhan Bakteri Streptococcus mutans secara In-Vitro. J. Kesehat. 9, 336 (2018).
7. Runadi, D. Isolasi dan Identifikasi Alkaloid dari Herba Komfrey. KARYA Ilm. Penelit. YANG TIDAK DIPUBLIKASIKAN (2007).
8. Fransiska Kristanti Silaen, Komalasari, S. R. M. Sebagai Inhibitor Korosi Pada Aluminium Dalam. Fteknik 7, 1–5 (2020).
9. Sanjaya, S., Santoso, G. C. K. W., Anggorowati, A. A. & Sudaryanto, Y. Pengendalian Laju Korosi Tembaga Pada Media Korosi Larutan NaCL dan HCL Dengan Menggunakan Tanin Daun Jambu Biji Sebagai Green Inhibitor. Widya Tek. 18, 59–63 (2019).
10. Prawirodihardjo, E. Uji aktivitas antioksidan dan uji toksisitas ekstrak etanol 70% dan ekstrak air laut batang kayu jawa (lannea coromandelica). Fak. Kedokt. dan Ilmu Kesehat. Uin Syarif Hidayatullah Jakarta 39 (2014).
11. Ryanata, E. PENENTUAN JENIS TANIN DAN PENETAPAN KADAR TANIN DARI KULIT BUAH PISANG MASAK (Musa paradisiaca L.) SECARA SPEKTROFOTOMETRI DAN PERMANGANOMETRI. J. Ilm. Mhs. Univ. Surabaya 4, 1–16 (2015).
12. L., S. Isolasi Dan Identifikasi Senyawa Tanin Dari Daun Belimbing Wuluh (Averrhoa bilimbi L.). Skripsi (2010).
13. Ash, M. & Ash, I. Handbook of Corrosion inhibitors. Metal Finishing vol. 98 (2000).
14. Kartono, Komalasari & Irianty, R. S. Pengendalian Laju Korosi Baja Karbon Menggunakan Inhibitor Ekstrak Daun Jambu Biji ( Psidium guajava , Linn ) dengan Metode Maserasi. Jom FTEKNIK 6, 2 (2019).
15. Sandy, B. D. N. Efektifitas Ekstrak Etanol Daun Gamal (Gliricidia sepium) Terhadap Mortalitas Cacing Ascaridia galli Secara In Vitro. 6, 82–87 (2020).
16. Mukhiriani, Nonci, F. Y. & Mumang. Penetapan Kadar Tanin Total Ekstrak Biji Jintan Hitam (Nigella sativa) Secarqa Spektrofotometri UV-Vis. J. Farm. UIN Alauddin Makassar 2, 154–158 (2014).
17. Yufita, E., Fitriana, D. & Zulfalina, Z. Control of Corrosion Rate on A36 Black Plate Steel in Corrosive Medium Using Salam Leaf Extract Inhibitor. J. Aceh Phys. Soc. 7, 67–71 (2018).
In order to publish in Chemistry Notes, authors are required to agree to the copyright permission stating that the authors give the publisher the right to reproduce, display or distribute the accepted manuscript. In this agreement the authors also automatically declare that the submitted manuscript is exempted from plagiarism issue and conflict of interest among the authors.
