PENGARUH PERLAKUAN PANAS DAN JENIS BAKTERI TERHADAP KETAHANAN KOROSI PADA MATERIAL BAJA ( API 5L DAN ASTM A53 ) DI LINGKUNGAN LAUT

SASTRADIMAJA, FEBRIAN RAMADHANA (2017) PENGARUH PERLAKUAN PANAS DAN JENIS BAKTERI TERHADAP KETAHANAN KOROSI PADA MATERIAL BAJA ( API 5L DAN ASTM A53 ) DI LINGKUNGAN LAUT. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Korosi merupakan hasil kerusakan degradasi material melalui suatu reaksi kimia atau elektrokimia secara spontan yang menyebabkan penurunan mutu material. Salah satu penyebab korosi yaitu adanya bakteri pada material. Bahaya yang ditimbulkan oleh korosi sangat fatal terutama pada anjungan lepas pantai, yaitu berhentinya produksi pada anjungan lepas pantai. Penelitian ini merupakan ekperimen dengan menggunakan material uji baja karbon API 5L Grade B dan ASTM A53 dimana material ini sering digunakan sebagai bahan dasar pembuatan pipa bawah laut. Material akan diberi perlakuan panas sebelum dilakukan immersion corrosion test pada air laut buatan (salinitas 35 ‰) yang telah ditambahkan bakteri dan tanpa ditambahkan bakteri. Metode yang digunakan untuk mengambil data laju korosi baja menggunakan metode weight loss. Laju korosi paling tinggi yaitu pada material ASTM A53 original dan API 5L original dengan penambahan bakteri T. Ferrooxidant berturut-turut sebesar 3.63 mpy dan 3.50 mpy. Sedangkan Laju korosi paling rendah yaitu pada material ASTM A53 heat treatment dan API 5L heat treatment tanpa penambahan bakteri berturut-turut sebesar 2.33 mpy dan 2.01 mpy. Hal ini mengindikasikan bahwa baja API 5L memiliki tingkat resistensi korosi yang lebih baik daripada ASTM A53 di lingkungan laut berbakteri dan tak berbakteri. ============================================================ ================================================== Corrosion is the result of damage to material degradation through a chemical or electrochemical reaction spontaneously which causes a decrease in the quality of the material. One of the causes of corrosion is the presence of bacteria on the material. The danger posed by corrosion is fatal, especially on offshore platforms, namely cessation of production at offshore rigs. This study is an experiment using material carbon steel API 5L Grade B and ASTM A53 which is this material is often used as a base for the manufacture of subsea pipelines. Material to be heat-treated before immersion corrosion test in artificial seawater (salinity 35 ‰) which have been added bacteria and without added bacteria. The method used to take the rate of corrosion steel data is weight loss. The highest corrosion rate of the material ASTM A53 original and API 5L original with the addition of T. Ferrooxidant bacteria are 3.63 mpy and 3.50 mpy. While the lowest corrosion rate material ASTM A53 heat treatment and API 5L heat treatment without adding bacteria are 2.33 mpy and 2.01 mpy. This indicates that the steel API 5L have high levels of corrosion resistance, better than ASTM A53 in the marine environment with bacterio or without bacteria.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: API 5L Grade B, ASTM A53, Bakteri, Bio-Korosi, Perlakuan Panas, Korosi. Bacteria, Bio-corrosion, corrosion, Heat Treatment.
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives
T Technology > TC Hydraulic engineering. Ocean engineering
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: FEBRIAN RAMADHANA SASTRADIMAJA
Date Deposited: 26 Jan 2017 06:33
Last Modified: 08 Mar 2019 04:22
URI: http://repository.its.ac.id/id/eprint/3093

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