PENGARUH PENAMBAHAN ALUMINIUM DAN MAGNESIUM TERHADAP KINERJA ANODA KORBAN PADUAN SENG UNTUK APLIKASI LINGKUNGAN AIR LAUT DENGAN METODE DNVGL-RPB401

Sulaiman, Zaid (2021) PENGARUH PENAMBAHAN ALUMINIUM DAN MAGNESIUM TERHADAP KINERJA ANODA KORBAN PADUAN SENG UNTUK APLIKASI LINGKUNGAN AIR LAUT DENGAN METODE DNVGL-RPB401. Masters thesis, Universitas Sultan Ageng Tirtayasa.

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Abstract

Sacrificed Anode Cathodic Protection (SACP) merupakan salah satu
metode proteksi katodik yang menggunakan anoda reaktif untuk memproteksi
struktur katoda. Salah satu anoda yang digunakan pada metode SACP adalah anoda
berbasis seng. Performa anoda dinilai dari dua parameter, yaitu potensial dan
kapasitas arus pada anoda. Tujuan penelitian ini adalah mengamati pengaruh
penambahan aluminium dan magnesium terhadap performa anoda korban. Metode
yang digunakan pada penelitian ini adalah pengujian DNVGL-RPB401 dan Tafel
untuk mempelajari sifat elektrokimia paduan, pengujian mikroskop optik untuk
menganalisis mikrostruktur paduan, pengujian XRD untuk mengetahui fasa
paduan, dan mengamati secara makro setelah dilakukan pengujian DNVGL�RPB401. Hasil penelitian menunjukan penambahan aluminium dan magnesium
membuat mikrostruktur paduan semakin halus. Selain itu, penambahan aluminium
menyebabkan adanya fasa aluminium pada paduan ZA3, sedangkan penambahan
magnesium menyebabkan adanya fasa Mg2Zn11 dan MgZn2 pada paduan ZM3.
Adanya fasa aluminium, Mg2Zn11 dan MgZn2 membuat nilai open circuit potential
pada anoda semakin negatif. Sedangkan nilai closed circuit potential pada ketiga
paduan sudah termasuk ke dalam kriteria potensial proteksi. Penambahan
aluminium dan magnesium juga dapat meningkatkan kapasitas arus anoda dari
661,80 Ah/kg untuk seng murni menjadi 743,11 Ah/kg dan 738,18 Ah/kg untuk
paduan ZA3 dan ZM3. Pada paduan ZA3 terdapat adanya korosi pitting yang dapat
dibuktikan melalui kurva polarisasi dan pengamatan makro. Sedangkan paduan
ZM3 mengalami korosi yang lebih merata dibandingkan paduan ZA3 dan seng
murni. Hal ini dapat diamati melalui pengamatan makro.
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Sa Sacrificed Anode Cathodic Protection (SACP) is a cathodic protection
method that uses a reactive anode to protect the cathodic structure. One of the
anodes used in the SACP method is a zinc-based anode. Anode performance is
assessed from two parameters, namely potential and current capacity at the anode.
The purpose of this study was to observe the effect of adding aluminum and
magnesium to the performance of the sacrificial anode. The research methods were
DNVGL-RPB401 and Tafel method to learn the electrochemical properties of the
alloy, optical microscope method to analyze the microstructure of the alloy, XRD
method to determine the alloy phase, and observed macro alloys after the DNVGL�RPB401 method. The results showed that the addition of aluminum and magnesium
caused the microstructure of the alloy refinement. In addition, the addition of
aluminum causes the presence of an aluminum phase in the ZA3 alloy, while the
addition of magnesium causes the presence of Mg2Zn11 and MgZn2 phases in the
ZM3 alloy. The presence of aluminum, Mg2Zn11, and MgZn2 phases caused the
value of the open-circuit potential at the anode towards to negative. While the value
of closed-circuit potential in the three alloys was included in the criteria for
protection potential. The addition of aluminum and magnesium also increase the
anode current capacity from 661.80 Ah/kg for pure zinc to 743.11 Ah/kg and 738.18
Ah/kg for ZA3 and ZM3 alloys. In ZA3 alloy there was pitting corrosion which can
be proven through polarization curves and macro-observations. Meanwhile, ZM3
alloy corroded more uniform than ZA3 alloy and pure zinc. This can be observed
through macro observations.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User: Zaid Sulaiman
Date Deposited: 13 Aug 2021 03:41
Last Modified: 13 Aug 2021 03:41
URI: http://repository.its.ac.id/id/eprint/85919

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