Abstract
The oxidation of zirconium and several zirconium alloys was investigated in the temperature range 400°–635°C in a static liquid sodium system with oxygen concentration approximately 10 ppm. A transition from a parabolic to a linear rate of oxidation was observed in the temperature region 400°–500°C for all of the zirconium alloys except Zircaloy‐2. Above 500°C the transition was not observed, and a protective film continued to form. Using the parabolic rate equation to describe the kinetics of oxidation, activation energies of for unalloyed Zr and for zirconium alloys were found.
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