Li D G, Song S L, Chen D R, Liang P
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China.
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China.
Ultrason Sonochem. 2022 Aug;88:106093. doi: 10.1016/j.ultsonch.2022.106093. Epub 2022 Jul 12.
The influences of Ce, Sm and Yb on cavitation erosion of NAB alloy in 3.5% NaCl solution are evaluated using mass loss, SEM, 3D morphology and Tafel plot, respectively. The results show that the addition of Ce or Sm or Yb enhances the mechanical property of NAB alloy, and the sizes of κ and κ phases within NAB alloy decrease with adding Ce or Sm or Yb, resulting in the prevention of the propagation of the cracks caused by cavitation erosion initially originated at the phase boundaries between α and κ phases, and finally the cavitation erosion damage significantly decreases with adding Ce or Sm or Yb. The corrosion of NAB alloy in 3.5% NaCl solution can promote the cavitation erosion of NAB alloy, while the corrosion resistance of NAB alloy increases with the addition of Ce or Sm or Yb, and then the cavitation erosion resistance is accordingly improved with the addition of rare earth element.
分别使用质量损失、扫描电子显微镜（SEM）、三维形貌和塔菲尔曲线评估了铈（Ce）、钐（Sm）和镱（Yb）对NAB合金在3.5%氯化钠溶液中的空蚀影响。结果表明，添加Ce、Sm或Yb可提高NAB合金的力学性能，且随着Ce、Sm或Yb的添加，NAB合金中κ相和κ′相的尺寸减小，从而防止了最初起源于α相和κ相之间相界处的空蚀裂纹扩展，最终添加Ce、Sm或Yb后空蚀损伤显著降低。NAB合金在3.5%氯化钠溶液中的腐蚀会促进NAB合金的空蚀，而随着Ce、Sm或Yb的添加，NAB合金的耐蚀性增加，进而添加稀土元素后其耐空蚀性相应提高。
