"In Situ-Tracking” Evaluation for Corrosion Progress at Fusion Boundary of Dissimilar Steel Welded Joints in H2S Containing Solution
2007 ◽
Vol 561-565
◽
pp. 2245-2248
Keyword(s):
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.