Waliardi, Muhammad Anugrah (2022) Analisa Pengaruh Material Abrasif Baru Dan Bekas (Re-Use) Dengan Komposisi Campuran Pada Proses Sandblasting Baja ASTM A36 Terhadap Daya Lekat Cat Dan Laju Korosi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baja sebagai material utama bangunan lepas pantai rentan mengalami korosi di lingkungan air laut. Korosi diartikan sebagai kerusakan atau degradasi material yang disebabkan oleh reaksi antara material dengan lingkungannya. Metode pengendalian korosi dapat dilakukan dengan pemberian lapisan cat atau coating yang efektif untuk mengurangi penyebaran korosi dan menambah masa pakai bangunan lepas pantai. Keberhasilan coating kuat dipengaruhi oleh persiapan permukaan dimana proses sandblasting dilakukan. Proses ini bertujuan untuk membersihkan permukaan dan membentuk profil kekasaran permukaan baja menembakkan material abrasif agar cat dapat menempel dengan kuat. Material abrasif yang sering digunakan hanya sekali pakai. Penelitian ini bertujuan untuk mengetahui pengaruh material abrasif baru dan bekas (re-use) terhadap daya lekat cat dan laju korosi di lingkungan air laut dengan menggunakan baja karbon rendah ASTM A36. Material baja akan dilakukan proses blasting dan diaplikasikan coating epoxy primer. Material abrasif yang digunakan yaitu steel grit G40 dan steel shot S330 yang divariasikan komposisi campuran antara material abrasif baru dan material abrasif bekas dengan komposisi Grit:Shot (60:40), Grit:Shot:Bekas (55:35:10), Grit:Shot:Bekas (50:30:20), dan Grit:Shot:Bekas (45:25:30). Hasil penelitian menunjukkan bahwa kekasaran permukaan tertinggi didapat dari campuran material abrasif baru steel grit dan steel shot (60:40) dengan nilai 53,11 μm. Pada pengujian kekuatan daya lekat cat, nilai adhesi tertinggi didapat dari campuran material abrasif baru steel grit dan steel shot (60:40) dengan nilai 11,19 MPa. Sedangkan pada pengujian laju korosi, nilai terkecil didapat dari campuran material abrasif baru steel grit dan steel shot (60:40) yaitu 0,0010850 mm/y. Penggunaan material abrasif baru menghasilkan kualitas coating yang tinggi. Namun untuk mengurangi penggunaan material abrasif baru, dapat dilakukan penambahan material abrasif bekas sebesar 10% yang akan memberikan kualitas coating mendekati penggunaan material abrasif baru.
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Steel as the main material for offshore buildings is susceptible to corrosion in the marine environment. Corrosion is defined as the damage or degradation of a material caused by a reaction between the material and its environment. Corrosion control methods can be carried out by applying an effective layer of paint or coating to reduce the spread of corrosion and increase the life of offshore buildings. The success of a strong coating is influenced by the preparation of the surface where the sandblasting process is carried out. This process aims to clean the surface and form a roughness profile of the steel surface by firing an abrasive material so that the paint can adhere firmly. Abrasive materials that are often used are only disposable. This study aims to determine the effect of new and used abrasive materials on paint adhesion and corrosion rate in a seawater environment using ASTM A36 low carbon steel. The steel material will be blasted and an epoxy primer coating will be applied. The abrasive materials used are steel grit G40 and steel shot S330 with varying compositions of mixtures of new and used abrasive materials with the composition Grit:Shot (60:40), Grit:Shot: Used (55:35:10), Grit: Shot: Used (50:30:20), and Grit:Shot: Used (45:25:30). The results showed that the highest surface roughness was obtained from a mixture of new abrasive materials, steel grit and steel shot (60:40) with a value of 53.11 m. In testing the adhesive strength of the paint, the highest adhesion value was obtained from a mixture of new abrasive materials, steel grit and steel shot (60:40) with a value of 11.19 MPa. Meanwhile, in the corrosion rate test, the smallest value was obtained from a mixture of new abrasive materials, steel grit and steel shot (60:40), which was 0.0010850 mm/y. The use of new abrasive materials results in a high quality coating. However, to reduce the use of new abrasive materials, 10% of used abrasive materials can be added which will provide a coating quality close to the use of new abrasive materials.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Sandblasting, Coating Epoxy, Material Abrasif, Adhesi, Korosi, Epoxy Coating, Abrasive Material, Adhesion, Corrosion |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.9.C57 Coatings |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | - Davi Wah |
| Date Deposited: | 23 Dec 2024 03:20 |
| Last Modified: | 23 Dec 2024 03:20 |
| URI: | http://repository.its.ac.id/id/eprint/116025 |
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