Pengaruh Jenis Elektroda RD dan LB E6010 Terhadap Laju Korosi Sambungan Las SMAW Pada Baja Ringan Dalam Media Air Laut
DOI:
https://doi.org/10.30871/jatra.v7i2.10981Kata Kunci:
Baja ringan, SMAW, Elektroda E6010, Korosi, Air lautAbstrak
Baja ringan banyak digunakan dalam konstruksi karena ringan dan ekonomis, namun rentan terhadap korosi terutama di lingkungan laut dengan kandungan ion klorida tinggi. Sambungan las hasil Shielded Metal Arc Welding (SMAW) menjadi titik rawan karena perubahan mikrostruktur dan cacat las yang mempercepat kerusakan. Penelitian ini bertujuan menganalisis pengaruh elektroda RD dan LB E6010 terhadap laju korosi sambungan las baja ringan dalam media air laut. Metode penelitian dilakukan melalui proses pengelasan pada baja galvanis 1,5 mm menggunakan arus 70–90 ampere dengan teknik stringer bead. Sampel kemudian direndam selama 21 hari dalam air laut Pantai Pagatan, Kalimantan Selatan, dan diuji menggunakan metode kehilangan berat. Hasil pengujian menunjukkan elektroda RD memiliki laju korosi 0,83 mm/tahun, lebih rendah dibandingkan LB sebesar 1,11 mm/tahun. Perbedaan ini dipengaruhi oleh cacat las, di mana elektroda LB menghasilkan porosity, slag inclusion, dan pitting corrosion lebih banyak. Berdasarkan klasifikasi ASTM G46, kedua nilai termasuk kategori sedang. Analisis statistik One-Sample T-Test menunjukkan perbedaan laju korosi belum signifikan pada taraf 95% akibat keterbatasan jumlah sampel. Kesimpulannya, elektroda RD lebih direkomendasikan untuk meningkatkan ketahanan korosi sambungan baja ringan di lingkungan laut.
Unduhan
Referensi
[1] H. Zones, H. D. R. Duplex, S. Steel, X. Liu, Y. Hu, and N. Liu, “Effect of Welding Current on Corrosion Resistance of,” pp. 1–10, 2024.
[2] H. Pratikno, H. S. Titah, and M. S. Azdkar, “Effect of Electrode Type for SMAW Welding on ASTM A36 Steel to Reduce Bio-corrosion Rate in Marine Environment Preparation of Steel Material of,” no. Isoceen 2018, pp. 165–169, 2020, doi: 10.5220/0008649801650169.
[3] F. B. Nduru and N. Y. Nugroho, “Effect of Air Humidity in MIG Welded Joints on Tensile Strength and Impact Strength of Aluminum 5052,” Berk. Sainstek, vol. 11, no. 2, p. 129, 2023, doi: 10.19184/bst.v11i2.37546.
[4] D. P. Sari, A. Arifin, G. Gunawan, D. Adanta, I. Asura, and I. Syofii, “Flow Rate Effects on Microstructure and Mechanical Properties for Titanium Weld Joint,” J. Energy, Mech. Mater. Manuf. Eng., vol. 6, no. 3, pp. 189–196, 2021, doi: 10.22219/jemmme.v6i3.19082.
[5] P. Varalakshmi, K. Manohar, K. Mallikarjun, and K. Lokesh, “Performance and Analysis of Weld Joint by using Two Dissimilar Electrodes E6010 and E7018,” pp. 919–923, 2019.
[6] K. Fecl, G. Anggaretno, and I. Rochani, “Analisa Pengaruh Jenis Elektroda terhadap Laju Korosi pada Pengelasan Pipa API 5L Grade X65,” vol. 1, no. 1, pp. 3–7, 2012.
[7] E. Surojo, N. I. Wicaksana, Y. C. N. Saputro, E. P. Budiana, and N. Muhayat, “applied sciences E ff ect of Welding Parameter on the Corrosion Rate of Underwater Wet Welded SS400 Low Carbon Steel,” 2020.
[8] F. Gapsari, P. H. Setyarini, F. Kurniawan, A. Ahnaf, M. Syaiful, and U. Khairi, “South African Journal of Chemical Engineering Corrosion inhibition of weldment by Nephelium lappaceum peel extract in 3 . 5 % NaCl solution,” South African J. Chem. Eng., vol. 41, no. December 2021, pp. 223–232, 2022, doi: 10.1016/j.sajce.2022.06.006.
[9] M. Sajjadnejad, H. Omidvar, and A. Hosseini, “Materials Chemistry and Mechanics Materials Chemistry and Mechanics Corrosion behavior of the weld region in carbon steels with rutile , cellulose and alkaline electrodes in marine environments,” vol. 3, no. July, pp. 1–11, 2025.
[10] A. Setiyo Umartono and D. Setiawan, “Analisa Laju Korosi Material Stainless Steel Grade SS304 dan Alloy UNS N08020 Terhadap Asam Sulfat dan Natrium Hidroksida,” Anal. Laju Korosi Mater. Stain. Steel SS3043 dan Alloy UNS N08020 Terhadap Asam Sulfat dan Natrium Hiroksida, vol. 09, pp. 1–5, 2020.
[11] S. Guide, “Standard Guide for Laboratory Immersion Corrosion Testing of Metals 1,” vol. i, pp. 1–3, 2021, doi: 10.1520/G0031-21.2.
[12] J. Jiang, N. Li, B. Wang, F. Liu, C. Liu, and X. Cheng, “A Study on the Influence of Different Defect Types on the Corrosion Behavior of Q235/TA2 Composite Plates in a Marine Environment,” Metals (Basel)., vol. 14, no. 6, 2024, doi: 10.3390/met14060652.
[13] S. Kamel and N. S. El-Sayed, “Cellulose and its Derivatives: Towards Green Inhibitors of Metal Corrosion,” Egypt. J. Chem., vol. 66, no. 13, pp. 2119–2139, 2023, doi: 10.21608/EJCHEM.2023.209188.7939.
[14] M. M. Ali and M. M. Kh, “Effects Of Welding Parameters On Characterization And Mechanical Properties Of Steel 37 Weldments,” J. Eng. Sci., vol. 48, no. 2, pp. 212–221, 2020, doi: 10.21608/jesaun.2020.188012.
[15] Z. Guo, S. Hu, D. Bai, and P. Jiang, “Weld quality and dynamic corrosion behavior of ship pipeline systems,” AIP Adv., vol. 15, no. 2, 2025, doi: 10.1063/5.0252854.
[16] F. Malaret, “Semi-Quantitative Categorization Method for the Corrosion Behavior of Metals Based on Immersion Test,” Metals (Basel)., vol. 14, no. 4, 2024, doi: 10.3390/met14040409.
[17] “Mars Fontana-Corrosion Engineering(www.iranidata.com)_copy.pdf,” 1987, McGraw-Hill Book Company, New York.
Unduhan
Diterbitkan
Cara Mengutip
Terbitan
Bagian
Lisensi
Artikel ini berlisensiCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
11.jpg){kind=logo}
