Mechanical and electrochemical properties of individual zones of a welded joint of 17H1S pipe steel are investigated. It is established that long operation causes decreases in the plasticity and impact toughness, especially of the metal of the heat-affected zone. For the operated metal, we observe a general regularity of the shift of the potential for all zones of the welded joint in the direction of negative values, which is the weakest for the base metal. With increase in the operation time of main pipelines, corrosion may be localized on the weld metal.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 46, No. 5, pp. 55–58, September–October, 2010.
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Tsyrul’nyk, O.T., Voloshyn, V.A., Petryna, D.Y. et al. Degradation of properties of the metal of welded joints in operating gas mains. Mater Sci 46, 628–632 (2011). https://doi.org/10.1007/s11003-011-9333-5
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DOI: https://doi.org/10.1007/s11003-011-9333-5