Research on Corrosion Resistance of the GTAW Joint of Duplex Stainless Steel

Abstract:

In order to study welding performances of duplex stainless steel, gas tungsten arc welding (GTAW) was adopted to butt-weld the S31803 tube whose wall thickness is 18.26mm. Metallographic structures of the weld, base metal and heat affected zone (HAZ) were also analyzed. Crevice corrosion resistance of the GTAW joint in 6%FeC13 + 0.05mol/L HCl solution in different temperatures had been tested according to ASTM G48. The results showed that with rising of temperature the average rate of crevice corrosion increased but the growth of corrosion rate slowed when the temperature reached a certain degree. There was corrosion groove in submarginal area of the crevice and the area near HAZ of the groove was much deeper. The results provided a reference to welding technology of S31803 DSS and also provided experiment resources for research on welding of the DSS.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 415-419
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.415
• Online since: February 2012
• Authors: Gang Tian, Mei Yang, De Zhi Zeng, Yuan Hua Lin, Da Jiang Zhu, Fei Liu
• Keywords: Average Corrosion Rate, Crevice Corrosion, Duplex Stainless Steel, Gas Tungsten Arc Welding

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