Nabila, Nur Afni Wirda (2023) Analisa Pengaruh Variasi Waktu Sand Blasting Terhadap Kekasaran Permukaan Dan Variasi Coating Dengan Campuran Epoxy Serbuk Aluminium Terhadap Laju Korosi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada dunia industri, salah satunya industri perkapalan, membutuhkan perlindungan terhadap degradasi pada material karena beroperasi pada lingkungan paling korosif yaitu laut. Salah satu metode perlindungan yang dilakukan adalan pelapisan. Pelapisan melindungi material dari reaksi dengan lingkungannya. Material yang digunakan adalah baja ASTM A36 yang digunakan pada industri perkapalan. Pada penelitian ini, baja akan dilakukan persiapan permukaan material dengan variasi waktu proses sand blasting yaitu 95 detik, 115 detik, dan 135 detik. Material akan dilapisi dengan campuran Epoksi sebagai pengikat dan variasi penambahan campuran serbuk aluminium sebagai pigmen sebesar 30%, 40%, dan 50%. Dari penelitian ini menunjukkan nilai kekasaran permukaan hasil sand blasting semakin naik seiring dengan peningkatan waktu sand blasting dengan nilai kekasaran terendah pada variasi waktu sand blasting 95 detik yaitu sebesar 39,3 µm sedangkan nilai tertinggi pada waktu sand blasting 135 detik dengan kekasaran sebesar 69,3 µm. Pengujian laju korosi dengan uji polarisasi elektrokimia dengan media NaCl 3,5% yang mewakili lingkungan laut, menunjukkan bahwa penambahan pigmen serbuk aluminium pada epoxy menghasilkan penurunan laju korosi. Hasil laju korosi tertinggi didapatkan pada campuran 30% serbuk aluminium yaitu 0,60245 mmpy dan terendah mencapai 0,028311 mmpy pada campuran 50% serbuk aluminium. Struktur yang ditampilkan melalui Scanning Electron Microscopy menunjukkan pigmen serbuk aluminium berbentuk platey tersebar merata pada lapisan.
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The shipping industry requires protection against material degradation as it operates in the sea, which is one of the most corrosive environment. One of protection method is coating. Coating protects the material from reaction with the environment. The ASTM A36 steel which is used in the shipping industry, will be the used in this study. The surface material of the steel will be prepared with variations in the sand blasting process time of 95 seconds, 115 seconds and 135 seconds. The material will be coated with an epoxy mixture as a binder and variations in the addition of a mixture of aluminum powder as a pigment of 30%, 40% and 50%. From this research, it shows that the surface roughness value of sand blasting results increases with increasing sand blasting time with the lowest roughness value at time 95 seconds which result to 39.3 µm roughness. While the highest value at 135 seconds sand blasting time with a roughness of 69.3 µm . The corrosion rate is tested by electrochemical polarization test with 3.5% NaCl media representing a marine environment, showed that the addition of aluminum powder pigment to the epoxy coating resulted in a decrease in the corrosion rate. The highest corrosion rate results were found in a mixture of 30% aluminum powder, namely 0.60245 mmpy and the lowest, reaching 0.028311 mmpy in a mixture of 50% aluminum powder. The structure shown by Scanning Electron Microscopy shows platey aluminum powder pigments spread evenly on the layer.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Korosi, Baja, Coating, Aluminium, Corrosion, Steel, Coating, Aluminium, Blasting |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Nur Afni Wirda Nabila |
| Date Deposited: | 31 Jul 2023 07:14 |
| Last Modified: | 31 Jul 2023 07:14 |
| URI: | http://repository.its.ac.id/id/eprint/100175 |
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