In this study, the corrosion and cracking behavior of the GH3535 alloy exposed to molten FLiNaK salts (46.5LiF-11.5NaF-42KF, mol%) with 0 and 0.1wt.% \(\hbox {Cr}_3\) \(\hbox {Te}_4\) and 0, 1 and 3wt.% \(\hbox {EuF}_3\) additions at \({700}^{\circ }\) C for 250 h were investigated. The results showed that all the samples exposed to tellurium containing salts exhibited intergranular corrosion and cracking, and the cracking severity increased with the increasing \(\hbox {EuF}_3\) concentration. Among them, the average and maximum cracking depths were 164 and \({57.1}\,\mu \text {m}\) , respectively. In contrast, the control sample exposed to salt without Te exhibited less evident intergranular corrosion and no intergranular cracking. These results demonstrate that the synergistic effect between \(\hbox {EuF}_3\) and \(\hbox {Cr}_3\) \(\hbox {Te}_4\) promotes grain boundary Te segregation and Cr depletion, resulting in more severe intergranular cracking.
