کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1468429 | 1509993 | 2016 | 7 صفحه PDF | دانلود رایگان |

• Corrosion resistance of zirconium alloys is improved by Ge addition.
• Corrosion resistance is optimal when Ge contents is 0.05%.
• Ge retards the evolution from columnar grains to equiaxed grains.
• Ge delays the developing process of defects to form micro-cracks in oxide.
• The sub-oxide layer identified as cubic-ZrO was detected at oxide/metal interface.
The corrosion behavior and microstructures of the oxide film on Zr-1Nb-xGe alloys (x = 0, 0.05, 0.1 and 0.2, wt%) corroded in deionized water at 360 °C/18.6 MPa were investigated. Results showed that the Zr-1Nb-0.05Ge alloy possessed much better corrosion resistance than the Zr-1Nb alloy. The Ge dissolved in the α-Zr matrix can retard the microstructural transformation of ZrO2 from the columnar grains to equiaxed grains and delay the process of the defects developing into micro-cracks in the oxide. The amorphous phase produced around the [Zr–Nb–Fe–Cr–O] SPPs can improve the corrosion resistance by relaxing the compressive stress in the oxide films. The sub-oxide layer identified to be cubic-ZrO may improve the corrosion resistance after corrosion transition.
Journal: Corrosion Science - Volume 102, January 2016, Pages 161–167