This paper provides a checklist of aspects of welding procedures to highlight issues that require attention to optimise the corrosion properties of welds in a range of CRAs including duplex stainless steels and some commonly used nickel alloys. Success depends on careful handling of the material to be welded, specifying the most suitable weld preparation and filler metal, controlling heat input during welding and adopting protective measures such as shielding with backing gas. Post-weld operations can also be significant in ensuring optimum performance.
KEYWORDS: CRAs, welding, corrosion resistance, shielding, heat input, case histories