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All Journal PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Metalurgi
Mujahidah, Hafsah
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Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Other

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VARIASI RAPAT ARUS TERHADAP SIFAT MEKANIK DAN MORFOLOGI LAPISAN MAGNESIUM AZ31 DENGAN MENGGUNAKAN METODE ELECTROPHORETIC DEPOSITION (EPD) Mujahidah, Hafsah; Elvira, Bunga Rani; Budi, Esmar; Thaha, Yudi Nugraha; Erryani, Aprilia
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol. 12 (2024): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2023
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1201.FA34

Abstract

Abstrak Magnesium AZ31 adalah paduan magnesium yang memiliki kekuatan mekanik tinggi dan densitas rendah.Namun, Magnesium AZ31 mudah terkorosi dan perlu dilapisi dengan lapisan pelindung untuk mengingkatkan ketahanannya terhadap korosi. Electrophoretic Deposition (EPD) adalah metode koloid dimana partikel bermuatan dalam suspensi dikenakan elektroforesis untuk mencapai deposisi permukaan padat pada elektroda. Dalam penelitian ini, peneliti melakukan perlakuan variasi rapat arus 0.005 A/mm2, 0.0075 A/mm2, dan 0.01 A/mm2 dengan suspensi yang digunakan adalah ZrO₂. Semakin tinggi rapat arus yang diberikan akan meningkatkan sifat mekanik. Morfologi yang dihasilkan menunjukkan adanya retakan dan persebaran butir yang menjadikan pembentukan gumpalan serta didukung dengan hasil mapping mendapatkan persebaran unsur Mg, O, Na, Si, Al, K, Zr, dan Zn. Nilai kekerasan linear dengan bertambahnya rapat arus yang diberikan 0,005 A/mm², 0,0075 A/mm², dan 0,001 A/mm² berturut-turut menghasilkan 119,42 HV, 121,56 HV, dan 137,88 HV sehingga membuktikan bahwa hasil pelapisan berhasil dilakukan dan juga ditandai dengan adanya kandungan unsur logam Mg, Zr serta ZrO. Kata-kata kunci: Magnesium AZ31, Elektrophoretic Deposition (EPD), Rapat Arus. Abstract Magnesium AZ31 is a magnesium alloy that has high mechanical strength and low density. However, Magnesium AZ31 is easily corroded and needs to be coated with a protective layer to improve its corrosion resistance. Electrophoretic Deposition (EPD) is a colloidal method where charged particles in suspension are subjected to electrophoresis to achieve solid surface deposition on electrodes. In this study, researchers treated variations in current density of 0.005 A/mm2, 0.0075 A/mm2, and 0.01 A/mm2 with the suspension used is ZrO₂. The higher the current density given will improve mechanical properties. The resulting morphology shows the presence of cracks and grain distribution which makes the formation of clumps and is supported by the results of mapping getting the distribution of elements Mg, O, Na, Si, Al, K, Zr, and Zn.The linear hardness values with increasing current density were given 0,005 A/mm², 0,0075 A/mm², and 0,001 A/mm² respectively resulting in 119,42 HV, 121,56 HV, and 137,88 HV thus proving that the coating result were successfull and also characterized by the presence of metal elements Mg, Zr and ZrO. Keywords: Magnesium AZ31, Electrophoretic Deposition (EPD), Current Density.
ANODIZING-ELECTRODEPOSITION HYBRID COATING BY USING ELECTROLITE SOLUTION AND ZIRCONIUM OXIDE ON THE SURFACE MAGNESIUM AZ31B Erryani, Aprilia; Elvira, Bunga Rani; Nurbaiti, Syifa Ranggoyani; Syahiddah, Amalia; Mujahidah, Hafsah; Thaha, Yudi Nugraha; Budi, Esmar
Metalurgi Vol 37, No 3 (2022): Metalurgi Vol. 37 No. 3 Desember 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2040.034 KB) | DOI: 10.14203/metalurgi.v37i3.680

Abstract

In this study, sodium silicate was synthesized and the characterization of zirconia which was used as a suspension solution for the anodization and electrodeposition processes. The results of the synthesis using FTIR showed the success of making Na2SiO3 with the appearance of absorption from functional groups such as: silanol (Si-OH) and siloxane (Si-O-Si) groups. From the SEM data, it is known that each batch contains elements of oxygen, sodium and silicon, this indicates that Na2SiO3 was successfully synthesized without any detectable impurities. Calcination results using SEM showed that each batch was dominated by zircon elements, but the highest zircon content in batch 3 was 88.81%. XRD data shows that ZrO2 (Monoclinic) dominates, in batch 1 and batch 3 there is Cl2 from ZrOCl. Therefore, the ZrO2 used without the calcination process is in batch 3. Anodizing and Electrodeposition processes are carried out in 3 ways, namely: a. Anodizing, b. Two steps (Anodizing-Electrodeposition, c. One step hybrid (Anodizing and Electrodeposition) with the addition of Al2O3 and Na2O7SiO3 elements to the electrolyte. The surface of magnesium after being coated looks pale white line. SEM data shows that all three methods are coated and contain elements of O, Na, Mg, Zr, Si, K, and in method c. Al is found. The three samples also showed that the sanding process was not optimal and the Zr particles were not evenly distributed on the surface.
Co-Authors Elvira, Bunga Rani Erryani, Aprilia Esmar Budi Nurbaiti, Syifa Ranggoyani Syahiddah, Amalia Thaha, Yudi Nugraha