Weld fabrication of a 6% molybdenum alloy to avoid corrosion in bleach plant service

This publication addresses the formation of unmixed zones which can form during the weld fabrication of INCO alloy 25-6MO (UNS N08925), one of the 6% molybdenum alloys. Using the proper weld fabrication procedures and joint design, these unmixed zones can be shown to be minimized and the weld corrosion integrity of the joint confirmed using standard ASTM corrosion test procedures.