Sulphide stress corrosion cracking of multiple welding repairs of girth welds in line pipe

O. E. Vega, A. Villagómez, J. M. Hallen, A. Contreras

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The susceptibility to sulphide stress corrosion cracking (SSCC) of four conditions of shielded metal arc welding repairs and one as welded specimen of the girth weld in seamless API X-52 microalloyed steel pipe were evaluated using slow strain rate tests. The slow strain rate tests were performed in air and in a NACE solution saturated with H2S both at room temperature to a constant elongation rate of 25.4×10-6 mm s-1. The SSCC susceptibility was evaluated in function of the reduction in area ratio and elongation ratio and also was manifested as a decrease in the mechanical properties. According to this consideration it is clear that all the weldments exhibit a great susceptibility to SSCC. After failure, the fracture surfaces were observed in the scanning electron microscope. The metallographic observations of the fractured specimens showed that the most susceptible area to SSCC was the intercritical heat affected zone. © 2009 Institute of Materials, Minerals and Mining.
Original languageAmerican English
Pages (from-to)289-296
Number of pages259
JournalCorrosion Engineering Science and Technology
DOIs
StatePublished - 1 Aug 2009
Externally publishedYes

Fingerprint

Welding
Corrosion
Sulfides
Stress corrosion cracking
Welds
Repair
Pipe
Strain rate
Elongation
Naphazoline
Steel
Electric arc welding
Steel pipe
Heat affected zone
Application programming interfaces (API)
Minerals
Electron microscopes
Hot Temperature
Metals
Air

Cite this

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abstract = "The susceptibility to sulphide stress corrosion cracking (SSCC) of four conditions of shielded metal arc welding repairs and one as welded specimen of the girth weld in seamless API X-52 microalloyed steel pipe were evaluated using slow strain rate tests. The slow strain rate tests were performed in air and in a NACE solution saturated with H2S both at room temperature to a constant elongation rate of 25.4×10-6 mm s-1. The SSCC susceptibility was evaluated in function of the reduction in area ratio and elongation ratio and also was manifested as a decrease in the mechanical properties. According to this consideration it is clear that all the weldments exhibit a great susceptibility to SSCC. After failure, the fracture surfaces were observed in the scanning electron microscope. The metallographic observations of the fractured specimens showed that the most susceptible area to SSCC was the intercritical heat affected zone. {\circledC} 2009 Institute of Materials, Minerals and Mining.",
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Sulphide stress corrosion cracking of multiple welding repairs of girth welds in line pipe. / Vega, O. E.; Villagómez, A.; Hallen, J. M.; Contreras, A.

In: Corrosion Engineering Science and Technology, 01.08.2009, p. 289-296.

Research output: Contribution to journalArticle

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