Pitting corrosion studies on functionally graded Inconel 825-SS316L wall manufactured by wire arc additive manufacturing

Abstract This research article addresses the pitting corrosion resistance of FGM walls fabricated by Wire Arc Additive Manufacturing (WAAM). The wall is created layer-by-layer transfer molten metal in an uninterrupted manner with little heat input using CMT process. Pitting tests were carried out as per ASTM G48-11 standard on specimens extracted from Inconel 825, interfaces, and SS316L regions wall. immersed ferric chloride hexahydrate solution for 24, 48, 72 h. It was found that interface made 825 more resistant to than specimens. weight loss measured 0.462 g, 0.1087 0.1349 g SS316L, interface, specimens, respectively. Scanning Electron Microscopy (SEM) Energy Dispersive Spectroscopy (EDS) used analyze products at pit. order was: > SS316L.