Karakterisasi Lapisan Anodizing Pada Aluminium 5083 Dengan Perbedaan Larutan Elektrolit Dan Waktu Perendaman

Saputri, Gita Feby (2026) Karakterisasi Lapisan Anodizing Pada Aluminium 5083 Dengan Perbedaan Larutan Elektrolit Dan Waktu Perendaman. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aluminium 5083 banyak digunakan pada industri kelautan dan konstruksi karena memiliki kekuatan spesifik tinggi dan ketahanan korosi yang baik. Namun, paparan lingkungan laut dengan salinitas dan kelembapan tinggi tetap dapat menyebabkan degradasi material akibat korosi. Penelitian ini bertujuan menganalisis pengaruh jenis elektrolit dan waktu anodizing terhadap karakteristik permukaan serta ketahanan korosi aluminium 5083. Proses anodizing dilakukan menggunakan elektrolit asam sulfat dan campuran asam oksalat–asam sulfat dengan variasi waktu 15, 20, 25, 30, dan 35 menit. Pengujian meliputi kekasaran permukaan, ketebalan lapisan, daya lekat pewarnaan, dan laju korosi. Hasil penelitian menunjukkan bahwa elektrolit campuran asam oksalat–asam sulfat menghasilkan kekasaran lebih tinggi dibandingkan asam sulfat pada menit ke-30 sebesar 0,664 µm. Ketebalan lapisan tertinggi diperoleh oleh elektrolit campuran asam oksalat–asam sulfat mencapai 6,300 µm pada menit ke-25. Daya lekat pewarnaan tertinggi sebesar 7,667 MPa diperoleh pada anodizing asam sulfat selama 25 menit. Laju korosi terendah sebesar 2,492 mm/y diperoleh pada elektrolit asam sulfat selama 15 menit. Hasil penelitian menunjukkan bahwa efektivitas proteksi korosi dipengaruhi oleh ketebalan lapisan, morfologi pori, dan integritas lapisan anodizing.
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Aluminum 5083 is widely used in the marine and construction industries due to its high specific strength and good corrosion resistance. However, exposure to marine environments with high salinity and humidity can still lead to material degradation caused by corrosion. This study aims to analyze the effect of electrolyte type and anodizing time on the surface characteristics and corrosion resistance of Aluminum 5083. The anodizing process was carried out using sulfuric acid and a mixed oxalic acid–sulfuric acid electrolyte with anodizing times of 15, 20, 25, 30, and 35 minutes. The tests conducted included surface roughness, coating thickness, dye adhesion strength, and corrosion rate. The results showed that the mixed oxalic acid–sulfuric acid electrolyte produced higher surface roughness than sulfuric acid, with the highest value of 0.664 µm obtained at 30 minutes. The maximum coating thickness was also achieved using the mixed oxalic acid–sulfuric acid electrolyte, reaching 6.300 µm at 25 minutes. The highest dye adhesion strength of 7.667 MPa was obtained from sulfuric acid anodizing for 25 minutes. The lowest corrosion rate of 2.492 mm/y was achieved using the sulfuric acid electrolyte at an anodizing time of 15 minutes. The results indicate that the effectiveness of corrosion protection is influenced by coating thickness, pore morphology, and the integrity of the anodized layer.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aluminium 5083, Anodizing, Jenis Elektrolit, Waktu Perendaman, Kekasaran Permukaan, Ketebalan, Laju Korosi, Daya Lekat Pewarnaan Aluminium 5083, Anodizing, Electrolyte Type, Immersion Time, Surface Roughness, Thickness, Corrosion Rate, Dye Adhesion
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Gita Feby Saputri
Date Deposited:	16 Jul 2026 06:51
Last Modified:	16 Jul 2026 06:51
URI:	http://repository.its.ac.id/id/eprint/135139

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