Additive manufacturing has recently begun to emerge as an important commercial manufacturingtechnology due to directly fabricate and repair complex metallic components that reduce theprocessing time and costs compared with traditional methods. However, the corrosion behavior ofadditively manufactured (AM) alloys has been sparsely studied and very little work has beenpublished so far. Corrosion will remain an important aspect needed to be treated for AM alloys.Therefore further research in terms of microstructure characterization and corrosion testing isrequired. Thus, the objective of this work is to study the corrosion response of AM 304 stainlesssteel (SS) in acidic solutions. The wrought counterpart was used to make the comparison. Firstly,the AM 304 SS specimen was produced using an AM-250 unit with a powder particle size in therange of 15-50 um. The microstructure of AM 304 SS was characterized by utilizing EDS, XRD,SEM instruments. The chemical composition and fine microstructure of the passive film on AM304 SS and wrought counterpart in acidic solution were characterized by XPS. The corrosionbehaviors of the passive film on two kinds of specimens were evaluated by electrochemicalanalysis. The dependence for the occurrence of faradic and non-faradic reactions on the nature ofthe passive film was investigated by EIS. The corrosion current density (i_(corr)) and breakdownpotential of passive film on specimens was revealed by cyclic polarization tests. Finally, theintegrated barrier characteristics of AM SS in acidic solution was evaluated and compared with thecounterpart.
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