Ardani, Erik Dwi Ardani (2026) Pengaruh Variasi Rapat Arus Dan Waktu Pada Proses Anodizing Terhadaop Kekasaran Dan Laju Korosi Pada Komposit Aluminium 6061 Dengan Penguat Bottom Ash Setelah Proses Perlakuan Panas T6. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Komposit matriks Aluminium 6061 berpenguat abu dasar (bottom ash) menawarkan sifat material yang ringan serta pemanfaatan limbah industri, namun memiliki kerentanan korosi yang tinggi akibat ketidakseragaman permukaan. Proses anodizing diperlukan untuk membentuk lapisan oksida pelindung yang meningkatkan kualitas permukaan dan ketahanan korosi. Penelitian ini bertujuan menganalisis pengaruh rapat arus (2 dan 3 A/dm²) serta durasi anodizing (15, 20, 25, dan 30 menit) terhadap kekasaran permukaan dan laju korosi komposit Aluminium 6061/abu dasar hasil stir casting setelah perlakuan panas T6. Anodizing dilakukan dalam larutan H₂SO₄ 15%, dengan kekasaran permukaan diukur menggunakan surface roughness tester dan laju korosi dievaluasi melalui perendaman dalam larutan HCl 1 M selama 24 jam. Hasil penelitian menunjukkan perubahan non-linear pada kekasaran permukaan, di mana nilai terendah sebesar 1,000 µm diperoleh pada rapat arus 2 A/dm² selama 20 menit. Mengenai perilaku korosi, anodizing selama 15 menit justru meningkatkan laju korosi dibandingkan spesimen tanpa perlakuan (360,855 mm/tahun). Namun, memperpanjang durasi menjadi 20–30 menit berhasil menurunkan laju korosi hingga mencapai nilai minimum 330,455 mm/tahun pada 3 A/dm² selama 30 menit (penurunan sebesar 8,43%). Kesimpulannya, anodizing pada 2 A/dm² selama 20 menit menghasilkan permukaan paling halus, sedangkan 3 A/dm² selama 30 menit memberikan perlindungan korosi terbaik untuk komposit Aluminium 6061/abu dasar dengan perlakuan panas T6.
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Aluminum 6061 matrix composites reinforced with bottom ash offer lightweight properties and industrial waste utilization, but they suffer from high corrosion susceptibility due to surface inhomogeneity. Anodizing is necessary to form a protective oxide layer that enhances surface quality and corrosion resistance. This study investigated the effects of current density (2 dan 3 A/dm²) and anodizing duration (15,20,25,"and " 30" minutes" ) on the surface roughness and corrosion rate of stir-cast Aluminum 6061/bottom ash composites after T6 heat treatment. Anodizing was conducted in a 15% H2SO4 solution, with surface roughness measured via a surface roughness tester and corrosion rates evaluated by immersion in 1" M HCl" for 24 hours. The results revealed a non-linear trend in surface roughness, where the lowest value of 1.000 μ"m" was achieved at 2A/dm² for 20 minutes. Regarding corrosion behavior, anodizing for 15 minutes increased corrosion rates compared to the untreated specimen (360.855" mm/y" ). However, extending the duration to 20–30 minutes reduced the corrosion rate, reaching a minimum of 330.455" mm/y" at 3 A/dm² for 30 minutes (an 8.43% reduction). In conclusion, anodizing at 2 A/dm² for 20 minutes yields the smoothest surface, while 3 A/dm² for 30 minutes offers the best corrosion protection for T6 heat-treated Aluminum 6061/bottom ash composites.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Aluminium 6061, abu dasar batubara, komposit matrik aluminium , anodizing, perlakuan panas T6, kekasaran permukaan, laju korosi.===================================================== Aluminum 6061, bottom ash, AMC, T6 heat treatment, anodizing, surface roughness, corrosion rate. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Erik Dwi Ardani |
| Date Deposited: | 04 Aug 2026 04:21 |
| Last Modified: | 04 Aug 2026 04:21 |
| URI: | http://repository.its.ac.id/id/eprint/143312 |
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