Corrosion studies were made on 22 zirconium alloys in liquid water at 360°C and 2708 psi for time periods up to 112 days. These alloys include dilute alloys of Zr with V, Cr, Ni, Fe, Sn, and Cu, intermetallic alloys of Zr with V, Cr, Ni, Fe, Sn, and Cu, intermediate alloys of Zr with V, Cr, Ni, Fe, Cu, and Zircaloy‐2 and ‐4. Weight gain and hydrogen contents were determined.