Saputro, Ramadhan Arif Rizky (2024) Pemetaan Tingkat Korosifitas Atmosfer di Wilayah Kota Surabaya dengan Logam Baja 440C. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Korosi atmosferik kerusakan material logam akibat dari reaksi dengan lingkungan yang disebabkan oleh beberapa faktor seperti polutan, keadaan geografi, dan curah hujan. Penelitian ini bertujuan untuk memetakan tingkat korosi atmosferik di lima wilayah Surabaya. Indikator pemilihan lima wilayah surabaya tersebut berdasarkan jarak dekatnya dengan pesisir pantai di wilayah utara, banyaknya perindustrian yang masih berjalan di wilayah timur, dan juga faktor padatnya jumlah penduduk di wilayah pusat, barat, dan selatan. Baja 440C-annealing dan baja 440C-tanpa perlakuan digunakan sebagai indikator laju korosi yang dipaparkan di lingkungan atmosferik selama 75 hari. Perhitungan laju korosi dilakukan dengan menggunakan metode weight loss dan dilakukan uji XRD untuk membandingkan hasil korosi di lima wilayah Kota Surabaya. Hasil penelitian menyimpulkan bahwa tingkat korosifitas atmosfer dari paling tinggi ke rendah untuk baja 440C-annealing berada pada Kecamatan Rungkut, Pabean Cantikan, Sukolilo, Bulak, Kenjeran, Gubeng, Tandes, Simokerto, Asemrowo, Bubutan, Pakal, Jambangan, Wonokromo, Wiyung, dan Tegalsari, sebesar 0,638 mpy , 0,4426 mpy, 0,3657 mpy, 0,3008 mpy, 0,2852 mpy, Gubeng 0,2349 mpy, 0,2003 mpy, 0,1346 mpy, 0,1165 mpy, 0,0983 mpy, 0,07 mpy, 0,068 mpy, 0,0476 mpy, 0,0426 mpy, dan 0,0384 mpy secara berurutan. Sedangkan, tingkat korosifitas atmosfer dari paling tinggi ke rendah untuk baja 440C-tanpa perlakuan berada pada Kecamatan Rungkut, Simokerto, Pabean Cantikan, Tandes, Wonokromo, Bulak, Sukolilo, Kenjeran, Asemrowo, Gubeng, Tegalsari, Bubutan, Jambangan, Wiyung, dan Pakal sebesar 4,3451 mpy, 3,5644 mpy, 2,1528 mpy, 1,127 mpy, 0,6763 mpy, 0,615 mpy, 0,5876 mpy, 0,3377 mpy, 0,2575 mpy, 0,2456 mpy, 0,2119 mpy, 0,1758 mpy, 0,1039 mpy, 0,0803 mpy, dan 0,0781 mpy secara berurutan. Hasil penelitian ini menunjukan bahwa spesimen dengan perlakuan panas annealing memiliki ketahanan korosi yang lebih baik dibandingkan spesimen tanpa perlakuan. Ini disebabkan oleh ukuran pearlite yang lebih besar, yang membuatnya lebih tahan terhadap korosi dan batas butir yang lebih sedikit dari spesimen dengan perlakuan panas annealing. Pemetaan tersebut dilakukan berdasarkan laju korosi di setiap kecamatan. Laju korosi ini dipengaruhi oleh keberadaan industri pada kecamatan-kecamatan tersebut serta letak geografisnya.
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Atmospheric corrosion is the deterioration of metal materials due to reactions with the environment caused by factors such as pollutants, geography, and rainfall. This study aims to map the level of atmospheric corrosion in five areas of Surabaya. Indicators for the selection of the five Surabaya areas are based on their proximity to the coast in the northern area, the large number of industries that are still running in the eastern area, and also the dense population in the central, western and southern areas. 440C-annealed steel and 440C-untreated steel were used as corrosion rate indicators exposed in an atmospheric environment for 75 days. Calculation of corrosion rate was done using weight loss method and XRD test was conducted to compare the corrosion results in five areas of Surabaya City. The results concluded that the level of atmospheric corrosivity from highest to lowest for 440C-annealed Sub-districts Rungkut, Pabean Cantikan, Sukolilo, Bulak, Kenjeran, Gubeng, Tandes, Simokerto, Asemrowo, Bubutan, Pakal, Jambangan, Wonokromo, Wiyung, Tegalsari, amounting to 0.638 mpy, 0, 4426 mpy, 0.3657 mpy, 0.3008 mpy, 0.2852 mpy, Gubeng 0.2349 mpy, 0.2003 mpy, 0.1346 mpy, 0.1165 mpy, 0.0983 mpy, 0.07 mpy, 0.068 mpy, 0.0476 mpy, 0.0426 mpy, 0.0384 mpy respectively. Meanwhile, the level of atmospheric corrosivity from highest to lowest for 440C steel-without treatment is in the sub-districts of Rungkut, Simokerto, Pabean Cantikan, Tandes, Wonokromo, Bulak, Sukolilo, Kenjeran, Asemrowo, Gubeng, Tegalsari, Bubutan, Jambangan, Wiyung, Pakal at 4.3451 mpy, 3.5644 mpy, 2.1528 mpy, 1.127 mpy, 0.6763 mpy, 0.615 mpy, 0.5876 mpy, 0.3377 mpy, 0.2575 mpy, 0.2456 mpy, 0.2119 mpy, 0.1758 mpy, 0.1039 mpy, 0.0803 mpy, Pakal 0.0781 mpy respectively. The results of this study indicate that specimens with annealing heat treatment have better corrosion resistance than untreated specimens. This is due to the larger pearlite size, which makes it more resistant to corrosion and fewer grain boundaries of the specimen with annealing heat treatment. The mapping was done based on the corrosion rate in each sub-district. This corrosion rate is influenced by the presence of industries in those sub-districts as well as their geographical location.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Baja 440C, Korosi Atmosfer, Visual Makro, Weight Loss, XRD, 440C Steel, Atmospheric Corrosion, Macro Visuals |
| 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 T Technology > TA Engineering (General). Civil engineering (General) > TA467 Iron and Steel Corrosion and protection against corrosion |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Ramadhan Arif Rizky Saputro |
| Date Deposited: | 05 Feb 2024 06:02 |
| Last Modified: | 05 Feb 2024 06:02 |
| URI: | http://repository.its.ac.id/id/eprint/106086 |
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