Multi-Objective Structural Optimization of a Large- Effect of Welding Current and Voltage on Weld Defects and Corrosion Resistance of HF-ERW ST37 Steel Pipes

Authors

https://doi.org/10.48313/mtei.v1i3.66

Abstract

The High-Frequency Welding (HFW) process is one of the most frequently employed fabrication techniques to manufacture longitudinally welded steel pipes in pipeline transport for oil and gas transmission applications. In this study, the impact of current strength and electrical potential on radiographic features and corrosion properties of HFW-steel ST37 pipes was analyzed. A 12 inches diameter ST37 steel pipe with a wall thickness of 6 mm was manufactured using the High-Frequency Electric Resistance Welding (HF-ERW) method by varying the current of welding between 1100 and 1130 A and keeping the frequency equal to 180 Hz. Radiography was performed to assess defectiveness and porosity structure. Also, electrochemical corrosion properties were studied using Tafel polarization curves in 3.5 wt.% NaCl medium. Electrochemical parameters, such as corrosion current density (icorr), corrosion potential (Ecorr), and polarization resistance (Rp), were obtained from Tafel polarograms using Stern–Geary equation. The radiography revealed that the increase in welding current and voltage led to a remarkable increase in porosity formation in welds owing to intensive heat exposure. The results of the electrochemical analysis show that the welds subjected to higher current intensities had a high corrosion current density and low polarization resistance, meaning a lower resistance to corrosion. The test sample with the highest porosity level performed poorly in terms of corrosion since pores and voids served as preferred locations of electrochemical corrosion and the entry of chloride ions into the metal matrix. The findings prove the importance of controlling HFW conditions to reduce corrosion in ST37 pipelines. 

Keywords:

High frequency welding, High-frequency electric resistance welding, ST37 steel, Radiographic evaluation, Weld porosity, Corrosion behavior, Tafel polarization, NaCl solution, Pipeline steel, Electrochemical corrosion

References

  1. [1] Llewellyn, D., & Hudd, R. (1998). Steels: Metallurgy and applications. Elsevier. https://www.amazon.com/s?k=9780080517766&i=stripbooks&linkCode=qs
  2. [2] Jannifar, A., Ichsan, T. A., Nurdin, H., Mukhtar, F., & Wahyudi, W. (2019). Welding current effect of welded joints of base metal st37 on characteristics: Corrosion rate and hardness. IOP conference series: earth and environmental science, 268(1), 12167. https://doi.org/10.1088/1755-1315/268/1/012167
  3. [3] Ravikiran, K., Xu, P., & Li, L. (2024). A critical review on high-frequency electric-resistance welding of steel linepipe. Journal of manufacturing processes, 124, 753–777. https://doi.org/10.1016/j.jmapro.2024.06.046
  4. [4] Sabzi, M., Kianpour-Barjoie, A., Ghobeiti-Hasab, M., & Dezfuli, S. M. (2018). Effect of high-frequency electric resistance welding (HF-ERW) parameters on metallurgical transformations and tensile properties of API X52 microalloy steel welding joint. Archives of metallurgy and materials, 63(4), 1693–1699. https://doi.org/10.24425/amm.2018.125094
  5. [5] Kazakov, A. A., Kiselev, D. V, Murysev, V. A., & Rybalchenko, I. V. (2022). Non-metallic inclusions and hook cracks of high-frequency induction welded pipes. CIS Iron and steel review, 24, 49–59. https://doi.org/10.17580/cisisr.2022.02.08
  6. [6] Shleenkov, A. S., Novgorodov, D. V, & Konovalchuk, V. O. (2022). Study of defects of longitudinal welded pipe. AIP conference proceedings, 2503(1), 50080. https://doi.org/10.1063/5.0099909
  7. [7] Duran, C., Triess, E., & Herbsleb, G. (1986). The resistance of high frequency inductive welded pipe to grooving corrosion in salt water. Mater. performance;(united states), 25(9), 41. https://trid.trb.org/view/429765
  8. [8] Güngör, O. E., Yan, P., Thibaux, P., Liebeherr, M., Bhadeshia, H. K. D. H., & Quidort, D. (2010). Investigations into the microstructure–toughness relation in high frequency induction welded pipes. In International pipeline conference (Vol. 44212, pp. 577-585). International Pipeline Conference. 10.1115/IPC2010-31372
  9. [9] Tyrala, D., & Pawlowski, B. (2021). Failure analysis of premature corrosion of HF seam-welded steel pipe in central heating system. Journal of failure analysis and prevention, 21(3), 772–778. https://doi.org/10.1007/s11668-021-01134-6
  10. [10] Pawłowski, B., Tyrala, D., & Pilch, M. (2020). Metallographic investigations of the premature corrosion failure of steel seam-welded galvanized cold water pipes. Journal of failure analysis and prevention, 20(1), 9–14. https://doi.org/10.1007/s11668-020-00803-2
  11. [11] Tyrała, D., & Pawłowski, B. (2022). Microstructural aspects of premature pitting corrosion of steel pipe–case study. Journal of failure analysis and prevention, 22(6), 2147–2153. https://doi.org/10.1007/s11668-022-01530-6
  12. [12] Khalaj, G., Pouraliakbar, H., Jandaghi, M. R., & Gholami, A. (2017). Microalloyed steel welds by HF-ERW technique: Novel PWHT cycles, microstructure evolution and mechanical properties enhancement. International journal of pressure vessels and piping, 152, 15–26. https://doi.org/10.1016/j.ijpvp.2017.04.003

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Published

2024-09-28

Issue

Vol. 1 No. 3 (2024): Mechanical Technology and Engineering Insights (MTEI)

Section

Articles

How to Cite

Hemmatnezhad, M. ., & Hatami Pour, S. . (2024). Multi-Objective Structural Optimization of a Large- Effect of Welding Current and Voltage on Weld Defects and Corrosion Resistance of HF-ERW ST37 Steel Pipes. Mechanical Technology and Engineering Insights, 1(3), 180-186. https://doi.org/10.48313/mtei.v1i3.66

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