Alloy 22 (UNS N60622) has been proposed for the corrosion resistant outer barrier of a two-layer waste package container at the potential repository site in Yucca Mountain. Alloy 22, a commercial alloy, is extensively used in aggressive industrial applications, especially due to its resistance to localized corrosion and stress corrosion cracking in high chloride environments. The purpose of this work was to characterize the corrosion behavior of Alloy 22 in concentrated environments that could be representative of evaporated underground water. The investigated environmental variables included immersion time, potential, temperature and anion concentration. Results show that Alloy 22 has a general corrosion rate less than 100 nm/year after immersion for one week in a multi-ionic solution (SAW) at 90 C. Using cyclic polarization curves, Alloy 22 was found susceptible to localized corrosion in a 10 M chloride solution at 90 C but this susceptibility disappeared when nitrate was added to obtain a chloride over nitrate molar ratio of 10.