Hapsari, Felita Widya (2020) Analisis Pengaruh Variasi Material Abrasif dan Ketebalan Polyurethane Coating pada Baja ASTM A36 terhadap Kekuatan Adhesi dan Laju Korosi di Lingkungan Air Laut. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Fenomena yang tidak dapat dihindari dari penggunaan logam baja pada bangunan lepas pantai dan floating vessel ialah terjadinya korosi. Salah satu metode pencegahan korosi ialah dengan cara pelapisan atau coating. Saat ini jenis coating yang telah dikembangkan di industri maritim ialah polyurethane. Keberhasilan proses coating sangat bergantung pada proses surface preparation. Metode yang biasa digunakan ialah blasting menggunakan material abrasif. Penelitian ini dilakukan untuk menganalisa pengaruh variasi material abrasif dan ketebalan polyurethane coating pada baja ASTM A36 terhadap kekuatan adhesi cat dan laju korosi di lingkungan air laut. Material baja akan di blasting dengan jenis material abrasif pasir silika dan steel grit, kemudian material di coating dengan polyurethane dengan ketebalan 60 μm, 80 μm, dan 100 μm lalu diuji kekuatan adhesi dan laju korosinya. Hasil penelitian ini menunjukkan bahwa nilai kekuatan adhesi terbesar ditunjukkan pada material yang di blasting menggunakan steel grit dengan ketebalan coating 60 μm yaitu sebesar 20,6 MPa. sedangkan nilai laju korosi terkecil diperoleh material yang di blasting dengan material abrasif steel grit dengan ketebalan 100 μm yaitu sebesar 0,00008 mm/a. Dari hasil tersebut material abrasif steel grit dan ketebalan 100 μm disarankan pada penggunaan polyurethane coating untuk aplikasi pada industri minyak dan gas.
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An unavoidable phenomenon of the use of steel in offshore buildings and floating vessels is corrosion. One method of preventing corrosion is by coating. Currently the type of coating that has been developed in the maritime industry is polyurethane. The success of the coating process is very dependent on the surface preparation process. The usual method used is blasting using abrasive material. The purpose of this research was to analyze the effect of variations in abrasive material and thickness of polyurethane coating on ASTM A36 steel towards the strength of paint adhesion and corrosion rate in the sea water environment. The steel material will be blasted with silica sand and steel grit, then the material will be coated with polyurethane with a thickness of 60 μm, 80 μm, and 100 μm then the adhesion strength and corrosion rate will be tested. The results of this study indicate that the greatest value of adhesion strength is shown in material blasting using steel grit with a coating thickness of 60 μm that is equal to 20,6 MPa. while the smallest corrosion rate values obtained by material blasting with steel grit abrasive material with a thickness of 100 μm that is equal to 0,00008 mm/a. From these results the abrasive steel grit material and a thickness of 100 μm are recommended for the use of polyurethane coatings in oil and gas industry.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | ASTM A36, Material Abrasif, Polyurethane Coating, Adhesi, Korosi,ASTM A36, Abrasive Material, Polyurethane Coating, Adhesion, Corrosion |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Felita Widya Hapsari |
| Date Deposited: | 13 Aug 2020 02:11 |
| Last Modified: | 31 May 2023 00:58 |
| URI: | http://repository.its.ac.id/id/eprint/77561 |
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