Effect of dilution on corrosion resistance of dissimilar weld metals using nickel base alloy filler wire

- Study on properties of super austenitic stainless steel weld metals -

Abstract

The effect of dilution on pitting corrosion resistance of dissimilar weld metal of super-austenitic stainless steel using nickel base alloy filler wire was investigated. As the dilution increased, Cr and Mo concentration at dendrite cores became lower because of solidification segregation and the amount of inclusions at dendrite boundaries increased. Consequently, the pitting corrosion resistance of large diluted dissimilar weld metal was deteriorated.