The corrosion resistances of the girth weld heat affected zone (HAZ) of duplex stainless steels were discussed regarding their use in pipeline for hostile environments.

A girth welded HAZ with a slow cooling rate welding procedure and a high pitting index base metal (Cr+3Mo+16N=34) showed the same corrosion resistance as the base metal, even in the as welded condition. The effect of the slow cooling rate would result from enough time for chromium to heal the chromium depleted area adjacent to chromium nitride precipitates.

Subject
Seams, Piping, Chromium, Welding, Girth welds, Joints, Base metals, Heat, Pitting, Corrosion resistance, Toughness, Weld metal, Austenite
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1988
Association for Materials Protection and Performance (AMPP)
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