Understanding the behavior of bimetallic joint at elevated temperatures and especially their corrosion behavior has become an object of scientific investigation recently. This paper reports on the high temperature corrosion behavior of bimetallic joint of SA-387 Gr 22 and SA-387Gr11 in air and molten salt environment of (Na2SO4-48% NaCl) at 650 °C and 800 °C under cyclic condition. The influence of molten salt on hot corrosion and oxidation has been discussed in detail. The corrosion kinetics of specimens with and without molten salt deposits indicated a parabolic growth of oxides. The resulting oxide scale in the weldment has been characterized systematically using surface analytical technique such as XRD and SEM/EDS analysis to evaluate the possible mechanisms of corrosion compounds are discussed. © 2014 University of Manchester and the authors.