Areza, Aura Diva (2026) Evaluasi Ketahanan Korosi Aluminium Seri 5083 Untuk Aplikasi Struktur Melalui Variasi Konsentrasi Asam Sulfat dan Waktu Perendaman Pada Proses Anodizing. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi konsentrasi asam sulfat (H₂SO₄) dan waktu anodizing terhadap karakteristik permukaan serta ketahanan korosi aluminium paduan seri 5083 untuk aplikasi struktur, khususnya pada lingkungan agresif seperti laut. Proses anodizing dilakukan secara galvanostatik pada suhu ruang dengan variasi konsentrasi H₂SO₄ sebesar 10%, 15%, dan 20%, serta waktu perendaman 20, 25, 30, 35, dan 40 menit. Pengujian yang dilakukan meliputi uji kekasaran permukaan (surface roughness), ketebalan lapisan oksida, kekuatan adhesi (pull-off test), serta laju korosi menggunakan metode weight loss melalui perendaman dalam larutan HCl 0,5 M selama 9 hari. Hasil penelitian menunjukkan bahwa variasi konsentrasi dan waktu anodizing memberikan pengaruh signifikan terhadap karakteristik lapisan anodize yang terbentuk, meskipun hubungan yang dihasilkan cenderung tidak linier. Nilai kekasaran permukaan tertinggi diperoleh pada konsentrasi H₂SO₄ 15% dengan waktu 35 menit sebesar 0,734 μm. Ketebalan lapisan oksida maksimum juga terjadi pada kondisi yang sama dengan nilai sebesar 13,97 μm. Sementara itu, kekuatan adhesi tertinggi diperoleh pada konsentrasi 15% dengan waktu 40 menit sebesar 9,63 MPa. Dari hasil pengujian korosi, proses anodizing mampu menurunkan laju korosi aluminium 5083 dibandingkan kondisi awal, dengan nilai laju korosi terendah diperoleh pada variasi parameter optimum. Secara umum, hasil penelitian menunjukkan bahwa konsentrasi H₂SO₄ sebesar 15% dengan waktu anodizing 35–40 menit merupakan kondisi optimum yang menghasilkan lapisan oksida dengan ketebalan tinggi, adhesi yang kuat, serta ketahanan korosi yang lebih baik. Temuan ini menunjukkan bahwa kualitas lapisan anodize tidak hanya dipengaruhi oleh ketebalan, tetapi juga oleh homogenitas dan integritas lapisan, sehingga optimasi parameter proses menjadi faktor penting dalam meningkatkan performa aluminium 5083 sebagai material struktural di lingkungan korosif.
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This study aims to evaluate the effect of variations in sulfuric acid (H₂SO₄) concentration and anodizing time on the surface characteristics and corrosion resistance of 5083 aluminum alloy for structural applications, particularly in aggressive environments such as marine conditions. The anodizing process was carried out under galvanostatic conditions at room temperature with variations in H₂SO₄ concentrations of 10%, 15%, and 20%, and immersion times of 20, 25, 30, 35, and 40 minutes. The tests conducted included surface roughness measurement, oxide layer thickness, adhesion strength (pull-off test), and corrosion rate using the weight loss method through immersion in a 0.5 M HCl solution for 9 days. The results show that variations in concentration and anodizing time have a significant effect on the characteristics of the anodized layer, although the relationships obtained tend to be nonlinear. The highest surface roughness value was obtained at an H₂SO₄ concentration of 15% with an anodizing time of 35 minutes, reaching 0.734 μm. The maximum oxide layer thickness was also achieved under the same conditions, with a value of 13.97 μm. Meanwhile, the highest adhesion strength was obtained at a concentration of 15% and a time of 40 minutes, reaching 9.63 MPa. From the corrosion testing results, the anodizing process was able to reduce the corrosion rate of 5083 aluminum compared to its initial condition, with the lowest corrosion rate obtained at optimal parameter variations. In general, the results indicate that an H₂SO₄ concentration of 15% with an anodizing time of 35–40 minutes represents the optimum condition, producing an oxide layer with high thickness, strong adhesion, and improved corrosion resistance. These findings indicate that the quality of the anodized layer is not only influenced by thickness, but also by its homogeneity and integrity. Therefore, optimization of process parameters is a key factor in improving the performance of 5083 aluminum as a structural material in corrosive environments.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Aluminium 5083, Anodizing, Asam sulfat, Kekuatan adhesi, Laju korosi. ========================================================================================== 5083 Aluminium, anodizing, sulfuric acid, surface roughness, oxide layer thickness, adhesion, corrosion rate. |
| Subjects: | T Technology > T Technology (General) T Technology > T Technology (General) > TA404 Materials--Biodegradation T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy. T Technology > TS Manufactures T Technology > TS Manufactures > TS161 Materials management. |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Aura Diva Areza |
| Date Deposited: | 20 Jul 2026 03:55 |
| Last Modified: | 20 Jul 2026 03:56 |
| URI: | http://repository.its.ac.id/id/eprint/135594 |
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