The hydrogen uptake behavior of Zircaloy-2 and Zircaloy-4 containing different second phase particles (SPPs) in size and category during corrosion test in super-heated steam at 400 oC/10.3 MPa was investigated. The amount of hydrogen uptake was not always corresponding to the corrosion resistance, while it was closely related to the SPPs size and category. At the same mass gain, the difference is significant in the amount of hydrogen uptake between the Zircaloy-2 and Zircaloy-4 specimens with coarse SPPs, while the difference is negligible in the amount of hydrogen uptake between the Zircaloy-2 specimens SPPs and Zircaloy-4 specimens with fine SPPs. The contribution of SPPs category to the hydrogen uptake is more notable to the specimens with coarse SPPs than specimens with fine SPPs. The tests, containing absorption pressure-composition-temperature (PCT), absorption and desorption kinetics, were proceeded in zirconium, Zr(Fe,Cr)2 and Zr2(Fe,Ni) intermetallic specimens. Results indicate that Zr(Fe,Cr)2 and Zr2(Fe,Ni) specimens could absorb and desorb hydrogen easily with high speed, while zirconium could only absorb hydrogen easily but desorb hydrogen difficultly. Based on these results, the hydrogen uptake behavior of Zircaloy corroded in super-heated steam at 400 oC /10.3 MPa were successfully explained with the model that the hydrogen generating from the reaction of zirconium and OH- at metal/oxide film interface can be captured by Zr(Fe,Cr)2 and Zr2(Fe,Ni) SPPs embedding at the metal/oxide interface. These SPPs with higher reversible absorbing and desorbing ability acted as a preferred path for hydrogen uptake.