This study investigates the role of carbide precipitation on metallurgical and corrosion behavior of AISI 316L alloy. Austenitic stainless steel AISI 316L wall was fabricated using wire arc additive manufacturing (WAAM) technique using a suitable set of process parameters and employing Robotic-Cold metal transfer (CMT) welding process. Weld specimens from this wall were subjected to a high-temperature post-weld thermal aging treatment of 750 °C/24 h (air cooled), considered to induce sensitization into this alloy, so as to study its metallurgical as well as corrosion behavior under degraded conditions. The results of this study show that aging resulted in the formation of Cr23C6 precipitates, due to which the dendritic regions of the walls got enriched in Cr and C, besides Fe and Ni getting depleted as compared to the as-welded wall. Such precipitation led to a high degree of segregation and hence higher chemical heterogeneity, which in turn degraded the pitting resistance of the AISI 316L wall.