The oxidation behavior of Cr-coated Zr-4 alloy is studied in air environment at temperatures ranging from 10 0 0 degrees C to 120 0 degrees C and for oxidation times ranging from 1 h up to 4 h. The oxidation weight gain, sample appearance, surface and cross-sectional microstructure, Cr-Zr diffusion and phase at different oxidation times for the three temperatures were analyzed in detail. The results reveal that the oxidation weight gain is parabola with oxidation time, and the parabolic rate constant increases with the increase of oxidation temperature. At 10 0 0 degrees C and 1100 degrees C, ...
