MARYANTI, RATIH (2024) PENGARUH ZINC DAN INDIUM PADA ANODA KORBAN PADUAN AL-ZN-IN MELALUI METODE DIE CASTING TERHADAP STRUKTUR MIKRO, KEKERASAN DAN LAJU KOROSI. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
Aluminum possesses good mechanical properties and corrosion resistance, making it ideal for use as a sacrificial anode in Al-Zn-In alloys to extend the lifespan of tanker hulls. This is especially important for AISI E 2512 steel, which is prone to corrosion. The efficiency of aluminum anodes can be improved by adding active elements such as zinc and indium. These additions not only enhance anode performance but also have a low pollution effect on the marine environment, making them an effective and environmentally friendly choice for cathodic protection. Sacrificial anodes are produced using the die-casting method, where metals are melted in a crucible furnace at a temperature of 700°C for six casting batches with three variations of zinc content above 4% and three variations of indium content above 0,01%. Various tests were then conducted, including composition testing, hardness testing, metallographic testing, impressed current testing, and SEM-EDX testing. The composition tests revealed that the actual composition differed from the designed composition. The microstructure tests showed that the formed phase was the α-Al phase, indicated by bright-colored images. The more zinc present in the alloy, the less α-Al phase formed. The highest hardness values were found in Batch A24046 at 30,78 VHN and Batch A24022 at 32,38 VHN. The addition of zinc and indium increased hardness because these elements dissolve in the α-Al phase. The impressed current tests showed that the lowest corrosion rate and highest efficiency were achieved with Batch A24046 at 8,63453x10^-7 mm/year with an efficiency of 88,9%, and Batch A24022 at 8,68378x10^-7 mm/year with an efficiency of 89.1%. The best results for tanker hull plates were obtained with Batch A24022, which had an actual composition of 4,348% Zn and 0,0153% In. The die-casting method produced a smooth and dense cast surface.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Aluminium memiliki sifat mekanik baik dan tahan korosi, digunakan sebagai anoda korban paduan Al-Zn-In untuk memperpanjang umur lambung kapal tanker. Hal ini terutama penting pada baja AISI E 2512, yang rentan terhadap korosi. Meningkatkan efisiensi anoda aluminium yaitu dengan ditambahkan elemen aktif seperti Zinc dan Indium. Penambahan akan meningkatkan kinerja anoda dan juga memiliki efek polusi rendah pada lingkungan laut, menjadikannya pilihan yang efektif dan ramah lingkungan untuk proteksi katodik. Anoda korban dibuat menggunakan pengecoran metode die casting dengan meleburkan logam pada crucible furnace temperatur 700oC terhadap 6 Batch pengecoran memiliki 3 variasi rancangan Zn lebih dari 4% dan 3 variasi rancangan In lebih dari 0,01%. Kemudian dilakukan uji komposisi, uji kekerasan, uji metalografi, uji impressed current dan uji SEM-EDX. Pengujian komposisi didapatkan komposisi aktual berbeda dengan komposisi rancangan. Pengujian struktur mikro didapatkan fasa yang terbentuk adalah fasa α-Al yang ditunjukan degan gambar berwarna terang, semakin banyak Zn dalam paduan maka semakin sedikit fasa α-Al yang terbentuk. Uji kekerasan didapatkan paling tinggi pada Batch A24046 sebesar 30,78 VHN, dan A24022 sebesar 32,38 VHN, seiring dengan penambahan Zn dan In akan meningkatkan kekerasan karena Zn dan In terlarut pada fasa α-Al. Uji impressed current didapatkan laju korosi paling rendah dan efisiensi paling tinggi yaitu Batch A24046 sebesar 8,63453x10^-7 mm/year dengan efisiensi 88,9% dan A24022 sebesar 8,68378x10^-7 mm/year dengan efisiensi 89,1%. Hasil terbaik untuk pelat lambung kapal ada pada Batch A24022 dengan komposisi aktual Zn 4,348% dan In 0,0153% melalui metode die casting menghasilkan permukaan hasil coran yang halus dan rapat. | |||||||||
| Subjects: | T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi |
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| Depositing User: | Mrs Ratih Maryanti | |||||||||
| Date Deposited: | 05 Jul 2024 17:18 | |||||||||
| Last Modified: | 05 Jul 2024 17:18 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/37765 |
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