Study on Corrosion Behavior of Simulated Welding Microstructure of Austenitic Stainless Steel

Abstract:

In this paper, the simulated welding structure of austenitic stainless steel is prepared by external heating, and the corrosion resistance of austenitic stainless steel in different areas of heat affected zone (HAZ) is evaluated by means of metallographic structure analysis, electrochemical impedance spectroscopy (EIS) test and equivalent circuit numerical fitting analysis. The result shows that the simulated welding structure of austenitic stainless steel had a growth trend with the increase of heating temperature, but the growth trend is not very obvious. The short thermal process has insufficient driving force for the growth of single-phase austenitic structure. The resulting of product resistance and charge transfer resistance of simulated welding microstructure of austenitic stainless steel is not completely consistent. The simulated welding microstructure of stainless steel shows the tendency of corrosion resistance degradation with the heating temperature increasing, and it has slightly lower when the maximum heating temperature locating at 1000-1100 °C.

• Periodical: Materials Science Forum (Volume 1066)
• Pages: 55-59
• DOI: https://doi.org/10.4028/p-2y16kq
• Online since: July 2022
• Authors: Rui Lei Zong, Bo Zhao*, Qing Jiang Wang, Qing Feng Yin, Dong Jin
• Keywords: Austenitic Stainless, Corrosion Resistance, Heat Affected Zone

References

[1] Abou-Elazm A, Abdel-Karim R, Elmahallawi I, et al. Correlation between the degree of sensitization and stress corrosion cracking susceptibility of type 304H stainless steel[J]. Corrosion Science, 2009, 51(2): 203-208.

DOI: 10.1016/j.corsci.2008.10.015

[2] Lin S X, Bao W.K., Gao J, et al. Intergranular Corrosion of Austenitic Stainless Steel[J]. Applied Mechanics & Materials, 2012, 229-231:14-17.

DOI: 10.4028/www.scientific.net/amm.229-231.14

[3] Zhao B, Shou B, Guo J. Corrosion Behavior of Simulated UNS S30400 Stainless Steel Heat Affected Zones[C]. Corrosion 2017, Houston.

[4] Mesquita R C , Ribeiro A, Gonalves C L, et al. Quantitative Analysis of the Sensitization of an Austenitic Stainless Steel Aged between 600 and 900°C through Electrochemical and Microstructural Measurements[J]. Materials Science Forum, 2020, 1012:430-435.

DOI: 10.4028/www.scientific.net/msf.1012.430

[5] Engelberg D.L. Intergranular Corrosion[J]. Shreirs Corrosion, 2010:810-827.

DOI: 10.1016/b978-044452787-5.00032-9

[6] Zhao B, Zhou T Y, Yu Y X, et al. Intergranular Corrosion of UNS N10276 Pipe Longitudinal wielding Seam[J]. Materials Performance, 2021 60(4):47-49.

[7] Zhao Z J, Zhang X T, Dai Q, et al. Effect of Twice Stablizing Heat Treatment on the Properties of 347H Stainless Steel[J]. Key Engineering Materials, 2021, 904: 82-87.

DOI: 10.4028/www.scientific.net/kem.904.82

[8] Nascimento C C F, Rodrigues S F, De Morais V M, et al. Methodology for corrosion evaluation in HAZ of 11%-Cr ferritic stainless steel[J]. Journal of Mechanical Science and Technology, 2016, 30(8): 3805-3811.

DOI: 10.1007/s12206-016-0743-z

[9] Chang L, Zhang X T, Zhao Z J, et al. Effect of Sensitization Time on Intergranular Corrosion of 347H Stainless Steel[J]. Key Engineering Materials, 2021, 904: 506-511.

DOI: 10.4028/www.scientific.net/kem.904.506

[10] Lo I H, Tsai W T. Effect of heat treatment on the precipitation and pitting corrosion behavior of 347 SS weld overlay[J]. Materials Science & Engineering A, 2003, 355(1-2):137-143.

DOI: 10.1016/s0921-5093(03)00078-9

[11] Aval H J , Serajzadeh S , Kokabi A H . Prediction of Grain Growth Behavior in HAZ During Gas Tungsten Arc Welding of 304 Stainless Steel[J]. Journal of Materials Engineering & Performance, 2009, 18(9):1193.

DOI: 10.1007/s11665-009-9380-3

[12] Sousa T D, Farias, Pereira J, et al. Microstructural analysis and impact toughness of HAZ of ferritic stainless steel with 11%Cr[J]. Soldagem & Inspeção, 2013, 18(3):198-206.