Corrosion Resistance of Dissimilar GTA Welds of Pipeline Steel and Super Duplex Stainless Steels in Synthetic Brine

The effect of weld passes and single V grove designs on the corrosion resistance of dissimilar welds of a low alloy steel and a super duplex stainless steel was studied in synthetic brine. Welds were manufactured in argon by the gas tungsten arc technique and joined by a high nickel wire of super du...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion (Houston, Tex.) Tex.), 2021-06, Vol.77 (6), p.668-680
Main Authors: Vargas, V.H., Albiter, A., Domínguez-Aguilar, M.A., Altamirano, G., Maldonado, C.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The effect of weld passes and single V grove designs on the corrosion resistance of dissimilar welds of a low alloy steel and a super duplex stainless steel was studied in synthetic brine. Welds were manufactured in argon by the gas tungsten arc technique and joined by a high nickel wire of super duplex stainless steel. Samples of weld regions were characterized by composition scans, electrochemical measurements, microhardness, and scanning electron microscopy. In X52/ER2594, a transition region of grain boundaries type II and a band of martensite were formed. The base metal of X52 underwent the highest corrosion rate and localized corrosion occurred in the heat affected zone. Interface ER2594/25Cr7Ni and 25Cr7Ni showed the presence of pitting near intermetallics.
ISSN:0010-9312
1938-159X
DOI:10.5006/3746