Rahman, Aulia (2007) PENGARUH LINGKUNGAN KOROSIF TERHADAP LAJU KOROSI PADA PIPA MINYAK DAN GAS. Other thesis, University of Muhammadiyah Malang.


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Metal join with weld system use often. In weldment, have save cost, relatively fast work, more light, and variety construct. Weldment have weakness is appear of strain that big cause of differences microstructur on weld zone that metal strength down and cause residual stress, and crack cause weldment. The point of this experience worked is want to know influence of corrosive environment that give at corrosion rate in experiment specimen. And to know forms of exposure corrosion that happen from rate corrosion that result. Then to know micro corrosion that happen in specimen that weld (weld metal, heat affected zone, and base metal). Endly can be recommendation in coating process or corrosion resistant plant because this experiment is diagnose corrosion attack that susceptible in speciment. In this experiment, have experiment methode, that each specimens group exposed in environment that digerences is NaCl 10%, H 2 SO 4 10%, and moist environtment, until hour 168. Then test measure rate corrosion, then test micro corrosion dan macro corrosion that happen as influence environments its in speciment IRON API5L-X52 that weld. The results, forms of corrosion that happen on specimen is in moist environment is uniform corrosion that thin (corrosion rate = 0), on expose environment NaCl 10% liquid is uniform corrosion that thick and pitting corrosion (corrosion rate = 2,036 Mpy), then on expose environment H2 SO 4 10% is happen uniform corrosion and pitting corrosion that more thick (corrosion rate = 53,041 Mpy). Form of micro corrosion that happen is selective leaching corrosion (in Base Metal, Weld Metal, and Heat Affected Zone). Zone that more corrosion attack is HAZ (10,797 %) as result thermal strain from weld thermal influence, then BM zone (8,978 %) result oxidation on exposure cause lost of shield elements and on corrosion resitant reduce, then WM zone (5,94 %) is influence of weld process, and because chemistry property that more better in shield of corrosion and compensation from residual stress.

Item Type: Thesis (Other)
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering > Department of Mechanical Engineering
Depositing User: Rayi Tegar Pamungkas
Date Deposited: 27 Jun 2012 03:10
Last Modified: 27 Jun 2012 03:10

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