Three classes of alloys including two ferritic steels (P91 and X20CrMoV11-1), two austenitic stainless steel (SS316 and SS347H), and a Ni-alloy (IN625) were studied as candidate materials for solar salt applications. The compositions of the alloys were obtained using optical emission spectroscopy (OES) and are listed in Table 1. Rectangular coupons were ground to 320 grit SiC abrasive paper, degreased in alcohol and dried in air. The initial dimensions and weight of the coupons were recorded.