Aji , Kurniawan Bayu (2005) Efek kuat arus terhadap proses Electro-Galvaniting dalam suasana asam. Undergraduate thesis, FMIPA UNDIP.
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Abstract
Besi 'adalah logarn yang sangat bermanfaat dalam kehidupan yang mudah mengalami korosi. Pelapisan logam secara elektrokimiawi menggunakan seng, yang disebut electro-galvanizing adalah salah sate cara perlindungan besi terhadap korosi. Telah dilakukan electro-galvanizing pada suasana asam (p1-1 4) dengan variasi kuat ants untuk mendapatkan lapisan seng yang dapat mencegah korosi pada besi. Electro-galvanizing berlangsung menggunakan ZnSO4.7H20 sebagai cumber seng, NH4C1 untuk meningkatkan konduktivitas, dan penyangga asetat. Percobaan ini menggunakan katoda besi dan anoda karbon,. dilakukan dengan variasi anus 5, 10, 15, 20, 25, 30, 35, dan 40 mA dengan voltase konstan 6 V selama dua jam pada suhu kamar. Perubahan berat katoda sebeltun dan sesudah electro-galvanizing digtmakan untuk menghitung efisiensi ants. Produk electro¬galvanizing kemudian diuji pada Iingkungan udara lembab selama enam bulan untuk mengukur ketahanannya terhadap korosi. Hasil menunjukkan bahwa produk electro-galvanizing dapat mencegah `besi dari korosi. Produk terbaik electro-galvanizing adalah lapisan seng yang diperoleh pada dari aplikasi arcs 40 mA, yang memiliki tekstur bersih, halus, dan berhasil mencegah korosi. Di sisi lain, kenaikan berat endapan seng di katoda adalah berbanding lurus dengan kenaikan ants, sesuai Hukum Faraday. Efisiensi at-us tertinggi pada percobaan ini ants 15 mA yang menghasi&an rendemen massa endapan seng 91,29 % dari berat teoretik. Iron is very useful metal that easy to rust. Electroplating of zinc that usually called electro-galvanizing is a kind of iron prevention from corrosion. Electro-galvanizing at acidic atmosphere (pH 4) with variation c' 'urrent have been done to get zinc sediments to prevent iron corrosion. Electro-galvanizing process used ZnSO4.7H20 as zinc source, NRIC1 to increase conductivity,, and acetate buffer. In this experiment, usage of iron cathode and carbon anode was conducted with variation of electrical current of 5, 10, 15, 20, 25, 30, 35, and 40 in A in constant voltage of 6 V within two hour at room temperature. Changes in cathode weight before and after electro-galvanizing was used to calculate the efficiency of electrical current. Product of electro-galvanizing then tested with humid atmosphere for six month to measure its stability against corrosion. Results show that electro-galvanizing product can prevent iron against corrosion. The best product of electro-galvanizing is zinc plate from application electrical current of 40 mA that clear, smooth texture, and successful, in preventing corrosion. In the other side, the increasing of zinc sediment mass in cathode was resulted in linear with the increasing of electrical current, that obeys Faraday's Law. The highest current efficiency of this experiment is electro¬galvanizing with electrical current 15 mA whose zinc sediment mass percentage of 91,29 %.
Item Type: | Thesis (Undergraduate) |
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Subjects: | Q Science > QD Chemistry |
Divisions: | Faculty of Science and Mathematics > Department of Chemistry |
ID Code: | 31054 |
Deposited By: | Mr UPT Perpus 1 |
Deposited On: | 14 Nov 2011 09:13 |
Last Modified: | 14 Nov 2011 09:13 |
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