<p>High-temperature power generating devices based on molten salt technology require suitable structural materials capable of withstanding severe environmental conditions. Corrosion behavior of bare and aluminide-coated SS 316 and Hastelloy N was investigated using molten fluoride salt mixture comprising of LiF-29.2%, KF-59.8%, and NaF-11% (by weight) at 700 and 800&#xa0;°C for 100&#xa0;h in flowing argon atmosphere. Post-corrosion analysis of the samples revealed that both the bare samples (SS316 and Hastelloy N) experienced marginal weight gain at 800&#xa0;°C. Presence of oxide precipitates formed by internal oxidation was observed in Hastelloy N, whereas a continuous Fe–Cr spinel-type outer oxide layer was detected on bare SS 316 alloy. The coated alloy samples showed reduction in weight after molten salt corrosion at 700 and 800&#xa0;°C. The samples having lower coating thicknesses were found to show superior resistance against the molten salt attack. The coated samples having higher thicknesses experienced higher weight loss. Although the presence of&#xa0;a protective outer alumina layer was observed in the coated samples after corrosion tests, the reduction in overall weight was found to be due to the selective leaching out of elements from both the coated alloys. Fe₂Al₅ and Ni₂Al₃ phase containing aluminide coatings were formed on SS 316 and Hastelloy N, respectively, using pack aluminizing process. Kinetics of coating growth with the process parameters, for instance pack chemistry, temperature, and time, were established. High-temperature oxidation test revealed the superior oxidation behavior of the coated alloys due to the formation of protective alumina scale.</p>