Comparative Study of Corrosion Resistance in Heat-Treated Bainitic and Pearlitic Steels in Sodium Chloride Solution under Room and Elevated Temperatures

Abstract:

The development of multiphase bainitic/martensitic steel aims to enhance the mechanical properties and corrosion resistance compared to traditional pearlitic steel. However, the impact of elevated temperatures on the corrosion resistance behavior of these materials cannot be overlooked. This study investigates the corrosion resistance behavior of multiphase bainitic/martensitic steel and pearlitic steel at varying temperatures. Electrochemical tests using Electrochemical Impedance Spectroscopy (EIS) and Linear Polarization (LP) in a 3.5 wt.% NaCl solution demonstrate a consistent trend: acicular bainitic steel exhibits superior corrosion resistance compared to granular bainitic steel and pearlitic steel at both room temperature and elevated temperatures. Further characterization using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) reveals that the formation of oxide layers significantly contributes to the enhanced corrosion resistance observed in these materials.

• Periodical: Materials Science Forum (Volume 1139)
• Pages: 57-64
• DOI: https://doi.org/10.4028/p-Nt7v01
• Online since: December 2024
• Authors: Phatarapol Thongsan*, Thammaporn Thublaor
• Keywords: Corrosion Resistance, Electrochemical Test, Temperature

References

[1] Office of Transport and Traffic Policy and Planning. Railway Infrastructure Standards. Bangkok: Office of Transport and Traffic Policy and Planning; 2018..

[2] Thai Meteorological Department. Climate Conditions of Thailand 2022. Bangkok: Meteorological Department; 2022.

[3] Konovalova V. The effect of temperature on the corrosion rate of iron-carbon alloys. Materials Today: Proceedings. 2021;38:1326-1329.

DOI: 10.1016/j.matpr.2020.08.094

[4] Liu, H., Wei, J., Dong, J., Zhou, Y., Chen, Y., Wu, Y., ... & Ke, W. (2021). The synergy between cementite spheroidization and Cu alloying on the corrosion resistance of ferrite-pearlite steel in acidic chloride solution. Journal of Materials Science & Technology, 84, 65-75.

DOI: 10.1016/j.jmst.2020.12.031

[5] Rojhirunsakool, T., Thublaor, T., Bidabadi, M. H. S., Chandra-ambhorn, S., Yang, Z., & Gao, G. (2022). Corrosion behavior of multiphase bainitic rail steels. Metals, 12(4), 694.

DOI: 10.3390/met12040694

[6] Haynes, G. S. (1985). Laboratory corrosion tests and standards: a symposium by ASTM Committee G-1 on Corrosion of Metals. Bal Harbour, FL, 14-16 Nov. 1983 (No. 866). ASTM International

[7] Song, Y., Liu, J., Liu, Y., & Yang, J. (2019). Corrosion Behavior of Ferrite-Pearlite Steels in Chloride-Containing Environments: The Role of Microstructure. Corrosion Science, 159, 108126.

[8] Park, S., Kim, J., Lee, D. H., & Kwon, H. (2018). Influence of Pearlite Banding on the Localized Corrosion of Low Carbon Steel in Chloride Solutions. Materials Chemistry and Physics, 207, 157-166.

[9] Varela, A., Gutierrez, E., & Alvarez, M. G. (2016). Effect of Pearlite Content on the Corrosion Behavior of Low Carbon Steel in a Simulated Seawater Environment. Journal of Materials Science, 51(10), 4796-4806.