Pengaruh Kadar Seng (Zn) pada Anoda Korban Aluminium terhadap Struktur Mikro dan Karakteristik Proteksi

Rahman, Arif (2020) Pengaruh Kadar Seng (Zn) pada Anoda Korban Aluminium terhadap Struktur Mikro dan Karakteristik Proteksi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Anoda korban yang seing digunakan di air laut adalah anoda korban berbasis aluminium. Oleh karena itu, pada penelitian ini akan dilakukan analisis lebih lanjut terkait dengan penambahan unsur Zn terhadap struktur mikro dan karakteristik proteksi anoda korban.Karakteristik proteksi yang akan diteliti yaitu nilai open circuit potential, kapasitas arus, laju korosi, laju konsumsi, dan efisiensi anoda korban aluminium setelah ditambah unsur Zn dengan variasi penambahan 16.31%, 17.25%, 18.95%, dan 19.8%. Metode yang digunakan yaitu pengecoran. Setelah itu dilakukan pengujian XRF, metalografi, tafel polarisasi, open circuit potential, dan galvanik. Hasil yang didapat yaitu penambahan unsur Zn menyebabkan muncunya Zn pada batas butir dan mempersempit daerah matriks α-Al. Hal tersebut berkaitan dengan turunnya nilai open circuit potential hingga -1,08 V Vs Ag/AgCl, namun terjadi peningkatan pada penambahan 19.8% Zn sebesar -1,04 V Vs Ag/AgCl, serta menurunnya kapasitas arus dan efisiensi seiring penambahan unsur Zn senilai 1715,2 A.h/kg dan 66,7%. Sementara itu, nilai laju konsumsi dan laju korosi meningkat seiring meningkatnya kadar Zn menjadi senilai 5,1 Kg/A.y dan 0,35927 mmpy.
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Sacrificial anodes that are often used in seawater are aluminum based sacrificial anodes. Therefore, in this study further analysis will be carried out related to the addition of Zn element to the microstructure and protection characteristics of the sacrificial anode. Protection characteristics to be investigated are the value of open circuit potential, current capacity, corrosion rate, consumption rate, and the efficiency of the sacrificial anode aluminum after adding Zn elements with variations in the addition of 16.31%, 17.25%, 18.95%, and 19.8%. The method used is casting. After that, XRF, metallographic, polarization, open circuit potential, and galvanic tests are tested. The results obtained are the addition of Zn causes Zn to appear at the grain boundary and narrow the matrix area α-Al. This is related to the decrease in the value of open circuit potential up to -1.08 V Vs Ag / AgCl, but an increase in the addition of 19.8% Zn by -1.04 V Vs Ag / AgCl, as well as a decrease in current capacity and efficiency along with the addition of Zn elements worth 1715.2 Ah / kg and 66.7%. Meanwhile, the value of the consumption rate and corrosion rate increased with increasing Zn levels to be 5.1 Kg / A.y and 0.35927 mmpy.

Item Type:	Thesis (Other)
Additional Information:	RSMt 620.112 23 Rah p-1
Uncontrolled Keywords:	Anoda, Aluminium, Zn, Karakteristik
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Arif Rahman
Date Deposited:	26 Apr 2023 08:19
Last Modified:	26 Apr 2023 08:19
URI:	http://repository.its.ac.id/id/eprint/73643

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