Muthi, Nooriah (2024) Pengaruh Temperatur Retrogression pada Perlakuan Retrogression and Reaging terhadap Corrosion Behavior Anoda Al-Zn-Mg Kapal Sepat 4 PT Pertamina Trans Kontinental. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Anoda aluminium merupakan anoda yang umum digunakan dalam proteksi katodik pada lingkungan air laut. Dengan beberapa keunggulannya seperti potensial aktif, densitas, dan laju konsumsi yang rendah serta efisiensi arus yang tinggi. Namun, di samping itu, anoda aluminium memiliki kekurangan sebab sifatnya yang mudah membentuk lapisan pasif sehingga perlu dipadukan dengan unsur lain pada penggunaannya, seperti Zn dan Mg. Namun, paduan Al-Zn-Mg sendiri masih sangat sedikit untuk dijadikan anoda sebab kemungkinannya yang rentan terserang intergranular corrosion. Oleh karena itu, dilakukanlah penelitian ini untuk menganalisis corrosion behavior paduan Al-Zn-Mg yang diberi perlakuan Retrogression and Reaging dengan menggunakan anoda dari PT Pertamina Trans Kontinental. Hasil yang didapatkan seiring bertambah temperatur adalah ukuran butir membesar (13.709 µm, 200.282 µm, 248.281 µm, 358.124 µm) laju korosi menurun (14.958 mm/a, 0.519 mm/a, 0.444 mm/a, 0.137 mm/a) impedansi dan resistansi lapisan pasif meningkat (84.223 Ω.cm2, 289.36 Ω.cm2, 527.58 Ω.cm2, 664.07 Ω.cm2). Namun, perlu dilakukan penelitian lebih lanjut terkait kinerjanya sebagai anoda sebab tren peningkatan temperatur tidak menunjukkan penurunan laju konsumsi. Hasil menunjukkan, sampel dengan laju konsumsi terendah berturut turut – turut adalah sampel 180oC (3.1 Kg/A.y), sampel Tanpa Perlakuan (3.3 Kg/A.y), sampel 200oC (3.6 Kg/A.y), dan sampel 160oC (3.7 Kg/A.y). Di sisi lain, peningkatan temperatur juga menunjukkan dapat meningkatkan intergranular corrosion resistance. Hal ini disebabkan kondisi presipitat pada paduan menjadi diskontinu dan PFZ melebar serta kemampuan butir yang membentuk lapisan pasif semakin baik yang merupakan hasil evolusi dari struktur mikro
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Aluminium anodes are anodes commonly used in cathodic protection in marine water environments. With some advantages such a low active potential and density, also consumption rate as wee as high current efficiency. However, in addition, aluminium anodes have a deficiency because they are so easy to form a passive layer that they need to be combined with other elementes for their use, such Zn and Mg. however, Al-Zn-Mg alloys themselves are still very few to be used as anodes due to the possibility that they are susceptible to intergranular corrosion. Therefore, this study was conducted to analyze the corrosion behavior of Al-Zn-Mg alloys treated with Retrogression and Reaging using anode from PT Pertamina Trans Kontinental. The results obtained as the temperature increases are increased grain size (13.709 µm, 200.282 µm, 248.281 µm, 358.124 µm), decreased corrosion rate (14.958 mm/a, 0.519 mm/a, 0.444 mm/a, 0.137 mm/a), increased impedance and passive layer resistance (84.223 Ω.cm2, 289.36 Ω.cm2, 527.58 Ω.cm2, 664.07 Ω.cm2). However, further research is needed regarding its performance as an anode because the temperature trend does not indicate an increase in the rate of consumption. The result showed that the samples with the lowest consecutive consumption rate were also samples of 180oC (3.1 Kg/A.y), non-treatment sample (3.3 Kg/A.y), 200oC (3.6 Kg/A.y), and 160oC (3.7 Kg/A.y). On the other hand, increased temperature also suggests increased intergranular corrosion resistance. This is due to the precipitates conditions of the alloy becoming discontinuous and PFZ expanding as well as the ability of the grain to form the passive layer better which is the result of the evolution of the micro structure.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Anoda Aluminium, Intergranular Corrosion, Paduan Al-Zn-Mg, Proteksi Katodik, Retrogression and Reaging Al-Zn-Mg Alloys, Aluminium Anodes, Cathodic Protection, Intergranular Corrosion, Retrogression and Reaging |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion T Technology > TA Engineering (General). Civil engineering (General) > TA480.A6 Aluminum alloys. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Nooriah Muthi |
| Date Deposited: | 02 Aug 2024 02:37 |
| Last Modified: | 24 Sep 2024 02:14 |
| URI: | http://repository.its.ac.id/id/eprint/111138 |
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