Chapter
Apr 26, 2012
Effects of Welding Methods on Corrosion Resistance of Welding Joint of X65 Pipeline Steel
Publication: ICPTT 2009: Advances and Experiences with Pipelines and Trenchless Technology for Water, Sewer, Gas, and Oil Applications
Abstract
In view of severe corrosion of welding joint of pipeline steel used for oil transportation, the welding joints of X65 pipeline steel formed by two different welding processes, plasma arc welding (PAW) and TIG welding used for backing welding and MIG welding for subsequent filling welding, were compared in terms of the microstructure, the hardness and the corrosion resistance with the welding joints formed by submerged arc welding(SAW). The results show that the microstructure of the PAW joint is finer and more uniform than those made by the other welding methods; The hardness of all the three kinds of welding joints can meet the NACE criteria. The results acquired from the electrochemical experiment and the test of sulfide induced stress corrosion cracking (SSCC) show that the PAW joint has the best corrosion resistance.
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Published In
ICPTT 2009: Advances and Experiences with Pipelines and Trenchless Technology for Water, Sewer, Gas, and Oil Applications
Pages: 1568 - 1578
Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Affiliations
China University of Petroleum-Beijing, 18 Fuxue Road, Changping, Beijing 102249, P.R.China. E-mail: [email protected]
Offshore Oil Engineering CO.LTD, 616# 1078 Danjiang road, Tanggu District, Tianjin, 300451, China. E-mail: [email protected]
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