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The Effect of Voltage and Electrolyte Solution on Coating Result on Aluminium Metal Anodization Process

Tugas Akhir, 038 / 2021 / TKI
Undergraduate Theses from JBPTPPOLBAN / 2024-01-22 10:15:18
Oleh : Salsabila Nisrina Junaedi - 181411091 & Wina Maulida - 181411095 (winamaulida9g@gmail.com )
Dibuat : 2024-01-22, dengan 4 file

Keyword : Effect, Voltage, Electrolyte Solution, Coating Result, Aluminium Metal Anodization Process
Subjek : Pengaruh Tegangan, Jenis Larutan Elektrolit, Lapisan, Proses Anodisasi, Logam Aluminium

Aluminium merupakan logam yang banyak digunakan sebagai bahan peralatan di industri karena memiliki sifat-sifat yang unggul seperti kuat, ringan, dan mudah dibentuk. Aluminium mempunyai sifat yang mudah terdeformasi dan mempunyai kekerasan serta ketahanan aus yang rendah. Proses anodisasi dilakukan untuk memperbaiki sifat fisis dan mekanis pada aluminium. Pengaruh tegangan terhadap efisiensi proses serta pengaruh jenis elektrolit (asam sulfat, asam kromat, asam fosfat, dan asam oksalat) dengan konsentrasi 15% terhadap ketebalan lapisan oksida dan kekerasan permukaan dievaluasi dalam penelitian ini. Proses anodisasi aluminium dilakukan pada variasi tegangan 6 V, 9 V, 12 V, 15 V dan 18 V dalam larutan asam sulfat 15%, jenis elektrolit yaitu asam sulfat, asam kromat, asam fosfat, dan asam oksalat dengan konsentrasi 15 %. Suhu proses ditetapkan ±25oC dengan waktu proses 20 menit, dan disertai pengadukan. Penentuan efisiensi proses berdasarkan hukum Faraday, uji ketebalan lapisan oksida menggunakan metode gravimetri dan microscope metallographic, uji kekerasan Vickers pada permukaan logam menggunakan alat uji microhardness. Hasil penelitian, efisiensi proses mencapai 77,85% dan nilai ketebalan lapisan oksida tertinggi dicapai menggunakan asam sulfat 15 % pada tegangan 18 V berdasarkan metode gravimetri yaitu 13,88 μm dan microscope metallography yaitu pada rentang 17,60 μm - 19,10 μm. Nilai kekerasan permukaan mengalami peningkatan dari 66,75 HV hingga 435,5 HV dicapai dari hasil anodisasi menggunakan asam sulfat 15% pada tegangan 6 V.

Deskripsi Alternatif :

Aluminium is a metal commonly used as a material industry because of its superior characteristics, such as being strong, light, and easy to shape. Aluminium is easily deformed and has low hardness and wear resistance. Improving the physical and mechanical properties of aluminium can be done through the anodization process. The effect of voltages on the efficiency of the process and the effect of the type of electrolyte (sulfuric acid, chromic acid, phosphoric acid, and oxalic acid) with a concentration of 15% on the thickness of the oxide layer and surface hardness were evaluated in this study. The aluminium anodization process was done at various voltages of 6 V, 9 V, 12 V, 15 V, and 18 V in a 15% sulfuric acid solution, different types of electrolytes, such as sulfuric acid, chromic acid, phosphoric acid, and oxalic acid with a concentration of each by 15%. The process temperature was set at ± 25oC with a processing time of 20 minutes each, and there was also a stirring process. The process efficiency was done based on Faraday's law, oxide layer thickness test using the gravimetric method and microscope metallographic, Vickers hardness test on metal surfaces using microhardness test equipment. The results showed that the process efficiency reached 77.85%. The highest layer thickness value based on the gravimetric method using 15% sulfuric acid at 18 V reached 13.88 μm and microscope metallographic reached 17,60 μm - 19,10 μm. The surface hardness value increased from 66.75 HV to 435.5 HV using 15% sulfuric acid at 6 V.

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