The preliminary characterization of liquid rubidium attack on several alloys, which potentially will be used as construction materials for the 85Kr recovery hardware and storage cylinders, is presented. In the temperature range of 773 to 893 K, liquid rubidium attack on unstressed Type 304 stainless steel is shown to result in grain boundary attack and high temperature oxidation. It is shown to form several distinct temperature dependent corrosion layers. In the temperature range of 400 to 627 K, results from both stressed “C” rings and notched tensile tests submerged in liquid rubidium are presented for 6061 aluminum, AISI 4130 steel. Types 304 and 316 stainless steel, Monel 400, and Inconel 600. Monel 400 was identified as having a liquid-metal embrittlement susceptibility at 400 K.