Weld Overlay
Weld overlay can be used in many applications to provide protection from corrosive and erosive metal loss environments. The comparative elevated costs of high alloy base materials make the weld deposit of a protective layer on a less expensive load-bearing mild or low alloy steel the most realistic and cost effective financial alternative. Nickel-alloy weld consumables, like Inconel 625, are most commonly applied as overlays on most grades of steel. For best results, iron dilution must be kept at minimum levels. Excessive amounts of iron in the overlay compromise the corrosion resistance. There are different welding processes available on the market. Brück concentrates on the most commonly used procedures for weld overlay :
Hot wire pulse Tungsten Inert Gas welding (T.I.G.)