The corrosion resistance of Zr-0.7Sn-1Nb-0.2Fe-xCu-xGe alloys in 360 degrees C lithiated water

摘要

The corrosion behavior of Zr-0.7Sn-1Nb-0.2Fe-xGe-xCu alloys (x=0, 0.05, 0.1, 0.2, wt%) and the microstructures of the oxide film formed on the specimens were investigated in lithiated water at 360 degrees C by autoclave tests. Results show that the corrosion resistance of the Zr-0.7Sn-1Nb-0.2Fe alloy is remarkably improved with 0.05% Cu and 0.05% Ge addition, since a small amount of Cu and Ge can dissolve in alpha-Zr matrix and Cu- or Ge-containing Zr(Nb,Fe)(2) second phase particles(SPPs) can delay the microstructural evolution of oxide film. But the coarse tet-Zr2Cu and tet-Zr3Ge SPPs, which will be formed by the further increase of Cu and Ge content, are disadvantageous to the corrosion resistance of the alloys. (C) 2016 Elsevier Ltd. All rights reserved.