Skripsi

CORROSION UNDER INSULATION MEDIA AIR LAUT DAN AIR RAWA PADA PENGELASAN BAJA A36 YANG DI-PREHEAT.

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Penilaian

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In general, corrosion damages material surfaces due to the presence of chemical compounds, especially in metals undergoing electrochemical reactions. The estimated impact of this damage is approximately 1.5% of the Gross National Product. Currently, the application of insulation as a preventive measure against corrosion in the industrial sector has significantly increased. Corrosion beneath insulation layers is caused by the trapping of water on surfaces covered by insulation. This study aims to analyze and evaluate the corrosion rate, hardness testing, impact testing, and metallographic testing of corrosion under insulation on A36 steel corroded with seawater and preheated swamp water before welding. The ASTM A36 steel, with dimensions of 100x100x10 mm, is preheated at temperature of 150°C and welded using E7018 electrodes. Subsequently, dye penetrant testing and weighing processes were conducted, followed by insulating the material with PVC tape on all parts except the top. The final step involved immersing the material for 7 days and 14 days in seawater and swamp water before a series of tests were conducted. Based on the test results, the highest corrosion rate for the 7-day specimen without insulation in swampwater immersion was 0.0999 mpy. The highest hardness value for specimens immersed in swampwater was 132 BHN. Meanwhile, the highest hardness value for specimens in seawater was 125 BHN. Impact testing results showed that the specimen with 14 days of swampwater immersion had the highest value at 151 Joules. The preheating and welding processes resulted in a metallographic structure dominated by acicular ferrite and widmanstatten phases

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2307006356	T130803	T1308032023	Central Library (Referens)	Available

Detail Information

Series Title

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Call Number

T1308032023

Publisher

Indralaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2023

Collation

xxix, 67 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

621.810 7

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

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Subject(s)

Prodi Teknik Mesin
Alat Pengunci dan Pengikat -Pengelasan

Specific Detail Info

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Statement of Responsibility

MURZ

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