Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel
Abstract
The influence of welding parameters on the resistance to pitting corrosion in welded joints of X5CrNi18-10 stainless steel was studied. Welding was performed by a TIG procedure in a shielding gas containing different amounts of nitrogen. The welding speed, the deposition rate of the filler wire, and the shielding gas flow rate were constant, which allowed the nitrogen content in the weld metal to be directly dependent on the nitrogen content in the shielding gas. It was shown that welding current and arc energy had a significantly lower influence on the resistance to pit formation and pit growth, than the nitrogen content in the shielding gas. Pitting corrosion testing was conducted using the potentiodynamic polarization method. The resistance to pit formation increases with the increase in nitrogen content in the weld metal, while the resistance to pit growth decreases. The microstructure of the weld metal becomes more homogeneous in the presence of nitrogen and the distribution of ch...romium more uniform, which leads to the increased resistance to pit formation. Also, due to the formation of ammonia ions, the pH value of the solution within the pit is higher than in the bulk solution, which also increases the resistance to pit formation.
Keywords:
Pitting corrosion / Austenitic stainless steels / Welded joints / Nitrogen / Electrochemical methodsSource:
Welding in the World, 2019, 63, 1, 167-179Publisher:
- Springer
Funding / projects:
- Investigation and Optimization of the Technological and Functional Performance of the Ventilation Mill in the Thermal Power Plant Kostolac B (RS-MESTD-Technological Development (TD or TR)-34028)
- Development of the tribological micro/nano two component and hybrid selflubricating composites (RS-MESTD-Technological Development (TD or TR)-35021)
DOI: 10.1007/s40194-018-0644-0
ISSN: 0043-2288; 1878-6669
WoS: 000463273800018
Scopus: 2-s2.0-85060284923
Collections
Institution/Community
IHTMTY - JOUR AU - Jegdić, Bore AU - Bobić, Biljana AU - Radojković, Bojana AU - Alić, Behar PY - 2019 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3375 AB - The influence of welding parameters on the resistance to pitting corrosion in welded joints of X5CrNi18-10 stainless steel was studied. Welding was performed by a TIG procedure in a shielding gas containing different amounts of nitrogen. The welding speed, the deposition rate of the filler wire, and the shielding gas flow rate were constant, which allowed the nitrogen content in the weld metal to be directly dependent on the nitrogen content in the shielding gas. It was shown that welding current and arc energy had a significantly lower influence on the resistance to pit formation and pit growth, than the nitrogen content in the shielding gas. Pitting corrosion testing was conducted using the potentiodynamic polarization method. The resistance to pit formation increases with the increase in nitrogen content in the weld metal, while the resistance to pit growth decreases. The microstructure of the weld metal becomes more homogeneous in the presence of nitrogen and the distribution of chromium more uniform, which leads to the increased resistance to pit formation. Also, due to the formation of ammonia ions, the pH value of the solution within the pit is higher than in the bulk solution, which also increases the resistance to pit formation. PB - Springer T2 - Welding in the World T1 - Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel VL - 63 IS - 1 SP - 167 EP - 179 DO - 10.1007/s40194-018-0644-0 ER -
@article{ author = "Jegdić, Bore and Bobić, Biljana and Radojković, Bojana and Alić, Behar", year = "2019", abstract = "The influence of welding parameters on the resistance to pitting corrosion in welded joints of X5CrNi18-10 stainless steel was studied. Welding was performed by a TIG procedure in a shielding gas containing different amounts of nitrogen. The welding speed, the deposition rate of the filler wire, and the shielding gas flow rate were constant, which allowed the nitrogen content in the weld metal to be directly dependent on the nitrogen content in the shielding gas. It was shown that welding current and arc energy had a significantly lower influence on the resistance to pit formation and pit growth, than the nitrogen content in the shielding gas. Pitting corrosion testing was conducted using the potentiodynamic polarization method. The resistance to pit formation increases with the increase in nitrogen content in the weld metal, while the resistance to pit growth decreases. The microstructure of the weld metal becomes more homogeneous in the presence of nitrogen and the distribution of chromium more uniform, which leads to the increased resistance to pit formation. Also, due to the formation of ammonia ions, the pH value of the solution within the pit is higher than in the bulk solution, which also increases the resistance to pit formation.", publisher = "Springer", journal = "Welding in the World", title = "Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel", volume = "63", number = "1", pages = "167-179", doi = "10.1007/s40194-018-0644-0" }
Jegdić, B., Bobić, B., Radojković, B.,& Alić, B.. (2019). Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel. in Welding in the World Springer., 63(1), 167-179. https://doi.org/10.1007/s40194-018-0644-0
Jegdić B, Bobić B, Radojković B, Alić B. Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel. in Welding in the World. 2019;63(1):167-179. doi:10.1007/s40194-018-0644-0 .
Jegdić, Bore, Bobić, Biljana, Radojković, Bojana, Alić, Behar, "Influence of welding parameters on pit initiation and pit growth in welded joints of X5CrNi18-10 stainless steel" in Welding in the World, 63, no. 1 (2019):167-179, https://doi.org/10.1007/s40194-018-0644-0 . .