Studi Eksperimen Pengaruh Konsentrasi Asam Oksalat Dan Kuat Arus Terhadap Kekerasan, Ketebalan, Dan Laju Korosi Lapisan Anodizing Aluminium

Hendriana Putri, Divara Agustia (2026) Studi Eksperimen Pengaruh Konsentrasi Asam Oksalat Dan Kuat Arus Terhadap Kekerasan, Ketebalan, Dan Laju Korosi Lapisan Anodizing Aluminium. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aluminium alloy 5052 banyak digunakan dalam berbagai aplikasi industri karena memiliki massa jenis yang ringan dan ketahanan korosi yang baik. Namun, material ini masih memiliki keterbatasan pada kekerasan permukaan sehingga diperlukan perlakuan permukaan untuk meningkatkan kualitasnya. Salah satu metode yang digunakan adalah anodizing, yaitu proses elektrokimia yang membentuk lapisan aluminium oksida pada permukaan material. Penelitian ini bertujuan untuk mengetahui pengaruh variasi konsentrasi asam oksalat dan kuat arus terhadap kekerasan, ketebalan, dan laju korosi lapisan anodizing pada aluminium alloy 5052. Variasi konsentrasi asam oksalat yang digunakan yaitu 0%, 2%, 4%, 6%, dan 8% dengan variasi kuat arus 2 A/dm² dan 3 A/dm². Hasil penelitian menunjukkan bahwa ketebalan lapisan tertinggi sebesar 24,9 µm diperoleh pada konsentrasi 8% dan kuat arus 3 A/dm², sedangkan nilai kekerasan tertinggi sebesar 257 HVN diperoleh pada konsentrasi 6% dan kuat arus 3 A/dm². Laju korosi terendah sebesar 150,0 mm/year diperoleh pada konsentrasi 8% dan kuat arus 2 A/dm². Hasil penelitian menunjukkan bahwa peningkatan konsentrasi asam oksalat dan kuat arus cenderung meningkatkan kualitas lapisan anodizing, serta lapisan yang lebih tebal mampu memberikan ketahanan korosi yang lebih baik.
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Aluminum Aluminum alloy 5052 is widely used in various industrial applications due to its low density and good corrosion resistance. However, this material still has limitations in terms of surface hardness, so surface treatment is required to improve its quality. One method used is anodizing, an electrochemical process that forms an aluminum oxide layer on the material’s surface. This study aims to determine the effect of variations in oxalic acid concentration and current density on the hardness, thickness, and corrosion rate of the anodized layer on aluminum alloy 5052. The variations in oxalic acid concentration used were 0%, 2%, 4%, 6%, and 8% with current density variations of 2 A/dm² and 3 A/dm². The results show that the highest coating thickness of 24.9 µm was obtained at an 8% concentration and a current density of 3 A/dm², while the highest hardness value of 257 HVN was obtained at a 6% concentration and a current density of 3 A/dm². The lowest corrosion rate of 150.0 mm/year was obtained at a concentration of 8% and a current density of 2 A/dm². The results indicate that increasing the oxalic acid concentration and current density tends to improve the quality of the anodized coating, and that a thicker coating provides better corrosion resistance.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Aluminium Alloy 5052; Anodizing; Asam Oksalat; Kuat Arus; Kekerasan; Ketebalan; Laju Korosi
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy. T Technology > TS Manufactures > TS173 Reliability of industrial products T Technology > TS Manufactures > TS670 Electroplating
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Divara Agustia Hendriana Putri
Date Deposited:	08 Jul 2026 01:18
Last Modified:	08 Jul 2026 01:18
URI:	http://repository.its.ac.id/id/eprint/134387

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