In Situ-Tracking Evaluation for Corrosion Progress at Fusion Boundary of Dissimilar Steel Welded Joints in H2S Containing Solution

Chun Xu Pan; Qiang Fu

doi:10.4028/www.scientific.net/MSF.561-565.2245

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In Situ-Tracking Evaluation for Corrosion Progress at Fusion Boundary of Dissimilar Steel Welded Joints in H₂S Containing Solution

Abstract:

The present work studied the corrosion property around the fusion boundaries of a dissimilar steel welded joint in as-welded condition and after post-weld heat treatment (PWHT) in H₂S containing solution with different times. An in-situ-tracking observation was proceeded for evaluating corrosive progress at the fusion boundary by using a scanning electron microscope (SEM). The results revealed that the fusion boundary was the worst region for corrosion resistance when comparing with other zones, and a broad boundary had a stronger resistance for hydrogen induced disbonding than a narrow one.