Hot corrosion is one of the major problems that reduce the lifespan of components used in high-temperature applications. Stainless steels are being employed in supercritical boilers, turbines, and other machines working at high temperatures. The special grades of stainless steels, such as SS 304, SS 304L, SS 316, etc., have good corrosion resistance and high creep strength even at elevated temperatures. In the present investigation, hot corrosion of SS316L was carried out on welded samples, which were prepared by using shielded metal arc welding (SMAW) and tungsten inert gas (TIG) together. Scale and sapling were observed from the microstructural analysis, which was done by using scanning electron microscope (SEM), X-ray diffraction (XRD), and cross-section analyses. After calculating the parabolic rate constant, it was observed that the rate of corrosion of the SS316L TIG-welded sample is less as compared to that of the SMAW-welded SS316L sample. To evade such corrosion, some modifications, such as increasing the amount of chromium, decreasing protrusion in the weldment, or washing internal surfaces with hot steam regularly, were taken into account. It is also observed that TIG-welded SS316L was quite better than SMAW-welded SS316L, which were subjected to hot corrosion for 50 cycles at 800 °C.