The corrosion performance of N10675 alloy weldments prepared by GMAW (Gas Metal Arc Welding/MIG Welding), GTAW (Gas Tungsten Arc Welding/TIG Welding) and SMAW (Shielded Metal Arc Welding/Stick Welding) were evaluated. Welded plates (0.5”-thick) and sheets (0.125”-thick) were investigated in this work. Overall corrosion loss rates in boiling 20%HCl acid were similar, irrespective of the type of welding method. Intergranular penetration attack occurred at the heat-affected-zones (HAZ) of all three as-welded 0.5”-thick plates and was more pronounced near the weld root. GMAW samples exhibited a slightly deeper corrosion penetration attack compared to GTAW and SMAW samples. While the corrosion rates of 0.5”-thick weld samples postweld heat treated (PWHT) at 1066°C were slightly higher than as-welded samples for each welding method, PWHT was shown to significantly lessen the depth of intergranular corrosion attack in the HAZ. In contrast, the impact of PWHT on the corrosion performance of the thin-gauge sheet welds was negligible. In addition, no stress-corrosion cracking (SCC) occurred on 0.125”-thick U-bend welded sheets prepared by GMAW, GTAW and SMAW.