Surbakti, Yani Cordoba (2017) Analisa Laju Korosi Pada Pipa Baja Karbon dan Pipa Baja Galvanis dengan Metode Kehilangan berat. Undergraduate thesis, Instititut Teknologi Sepuluh Nopember.
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Abstract
Logam merupakan bahan terbesar penyusun konstruksi dan sistem pada kapal baja. Dalam penggunaanya logam sangat rentan mengalami korosi sehingga mempengaruhi daya tahan dan operasional kapal tersebut. Oleh karena itu pemilihan material dalam perencanaan pembangunan kapal sangat perlu dilakukan agar pemilik kapal tidak rugi karena memiliki daya tahan tinggi sehingga berpengaruh terhadap biaya investasi dalam perawatan. Penelitian ini membahas laju korosi pipa baja karbon dan pipa baja galvanis dengan variasi salinitas larutan (air laut), lama perendaman, dan kecepatan aliran dengan standart ASTM G1-72 dan ASTM G1-90 .Hasil laju korosi masing-masing spesimen akan dibandingkan dan diprediksi usianya dengan menggunakan API 570 dan BKI volume 3 tahun 2014. Dari data hasil percobaan diperoleh hasil laju korosi Pipa Baja Karbon salinitas 3%, 6% tanpa kecepatan masing-masing 0,38184 dan 1.357584. Laju Korosi pipa baja galvanis 3%, 6% tanpa kecepatan masing-masing 0.159763 dan 0.217836. Laju Korosi pipa baja karbon kecepatan 3.95 m/hr dan 3.29 m/hr adalah 0.877051 dan 0.576601. Sementara laju korosi pipa galvanis kecepatan 3.95 m/s dan 3.29 m/s adalah 0.212672 dan 0.1821101 kesimpulan laju korosi pipa baja karbon lebih besar dari pipa baja galvanis dalam segala kondisi. Untuk prediksi usia pipa, pipa baja karbon memiliki nilai laju korosi lebih rendah dari pipa baja galvanis. Jadi untuk semua sistem yang menggunakan air laut sebagai fluida alir disarankan untuk menggunakan pipa baja galvanis.
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Metal is the biggest material for building up of construction and steel ship systems. For its use, metal is literally easy for getting corrosion and can give some affects to ship’s operational and durability. So, choosing material selectively on ship bulding plan is extremely needed in order to avoid the ship owners getting loss due to have high endurance that can impact to investment and maintanance costs. This study discusses about corrosion rate of carbon and galvanized steel pipe with many variation of solution salinity (sea water), period of submersion, and flow velocity based on the standards are named ASTM G1-72 and ASTM G1-90. The old could be predicted and compared by seen the results of corrosion rate each spesimen using API 570 and BKI Vol. 3 2014.From the experimental data, the corrosion rate of Salinity Steel Pipe is 3%, 6% without flow rate 0,38184 and 1.357584 respectively. Corrosion rate of galvanized steel pipe 3%, 6% without flow rate respectively 0.159763 and 0.217836. The corrosion rate of carbon steel pipe speeds of 3.95 m /s and 3.29m / s is 0.877051 and 0.576601. While the galvanized pipe corrosion rate of 3.95 m / hr and 3.29 m /s is 0.212672 and 0.1821101. Based on the experiment, it can be concluded that the corrosion rate of carbon steel pipe is larger than galvanized steel pipe in every conditions. Regarding to pipe age prediction, carbon steel pipe has a lower corrosion rate value than galvanized steel pipe. In simple, for all systems that using sea water as flowing fluid are advised to use galvanized steel pipe.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Weigh loss method, ASTM G1-72, ASTM G1-90, API 570, BKI Volume 3 section 11 |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Yani Cordoba Surbakti |
| Date Deposited: | 26 Sep 2017 06:28 |
| Last Modified: | 06 Mar 2019 06:50 |
| URI: | http://repository.its.ac.id/id/eprint/44724 |
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