Evaluation of the diffusivity and susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints

Authors

  • B Araujo
  • T Maciel
  • J Carrasco
  • E Vilar
  • A Silva

DOI:

https://doi.org/10.1260/1750-9548.7.3.183

Abstract

This paper presents a study of susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints by SMAW and GTAW processes. By varying the consumables used and the use of the same interpass temperature three different welded joints were obtained. Tests of hydrogen embrittlement susceptibility were performed according to ASTM G129-2006 with an aqueous solution (Solution A - TM0177 / 2005 NACE) sodium thiosulfate (Na 2 S 2 O 3 ) replacing the bubbling of H 2S. From the elongation values ​​was observed that the joint obtained in all welding conditions showed susceptibility to hydrogen embrittlement, which was determined by the elongation ratio. The joints that showed higher levels of hardness showed higher susceptibility to hydrogen embrittlement. The joints obtained with higher welding speeds for the same amount of heat input presented a reduction in the rate of hydrogen embrittlement. All joints tested in solution showed fracture surfaces with quasi cleavage zones.

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MODENESI, PJ et al., Introduction to Welding Metallurgy. Handout. UFMG, Belo Horizonte, 2006.

GRIFITHS, AJ & THURNBULL, A. Corrosion, 1997, 53 (9), 700-711.

ARAFIN, MA, SZPUNAR, JA, Effect of bainitic microstructure on the susceptibility of pipeline steels to hydrogen induced cracking, Materials Science and Engineering A, 2011, 528, 4927-4940. https://doi.org/10.1016/j.msea.2011.03.036

KOH, SU et al., Effect of Line Pipe Steel Microstructure on Susceptibility to Sulfide Stress Cracking. Corrosion, 160 (3), 244-253. https://doi.org/10.5006/1.3287728

CHANG, KD et al., Effects of heat-treatment process of a novel bainite / martensite dual-phasehigh strength steel on its susceptibility to hydrogen embrittlement. ISIJ International, 2001, 41, 1397-1401. https://doi.org/10.2355/isijinternational.41.1397

HARDIE, D., CHARLES, EA, LOPEZ, AH, Hydrogen Embrittlement of High Strength Pipeline Steels. Corrosion Science, 2006, 48, 4378-4385. https://doi.org/10.1016/j.corsci.2006.02.011

HUANG, F. et al., Effect of microstructure and inclusions on hydrogen induced cracking susceptibility and hydrogen trapping efficiency of X120 pipeline steel. Materials Science and Engineering A, 2010, 527, 6997-7001. https://doi.org/10.1016/j.msea.2010.07.022

NACE STANDARD MR0175, "Sulfide Stress Cracking Resistant Metallic Materials for Oil Field Equipment" (Houston, TX: NACE International, 2002).

MARTINS, FA Evaluation of the API steel welded joint in corrosive medium. Dissertation (Master) - Department of Materials Science and Metallurgy, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 2005. https://doi.org/10.18057/icass2018.p.116

Published

2013-09-30

How to Cite

Araujo, B., Maciel, T., Carrasco, J., Vilar, E. and Silva, A. (2013) “Evaluation of the diffusivity and susceptibility to hydrogen embrittlement of API 5L X80 steel welded joints”, The International Journal of Multiphysics, 7(3), pp. 183-196. doi: 10.1260/1750-9548.7.3.183.

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