高Nb锆合金在含氧蒸汽中耐腐蚀性能恶化的机理

黄建松, 裴文, 徐诗彤, 白勇, 姚美意, 胡丽娟, 谢耀平, 周邦新

Degradation Mechanism on Corrosion Resistance of High Nb-Containing Zirconium Alloys in Oxygen-Containing Steam

HUANG Jiansong, PEI Wen, XU Shitong, BAI Yong, YAO Meiyi, HU Lijuan, XIE Yaoping, ZHOU Bangxin

表2 合金在400℃、10.3 MPa不同环境中腐蚀42 d的氧化膜中第二相的氧化产物

Table 2 Oxidation products of SPPs in the oxide film on the alloy corroded in superheated steam with DE, 300 μg/kg DO, and 1000 μg/kg DO at 400oC and 10.3 MPa for 42 d

Environment SPPs D / μm Oxidation product DE SPP1 0.1 t-ZrO2, m-Nb2O5 SPP2 0.7 m-Nb2O5 SPP3 2.0 Amorphous 300 μg·kg-1 SPP1 1.0 - SPP2 0.4 Amorphous, m-Nb2O5 SPP3 2.3 m-ZrO2, m-Nb2O5 1000 μg·kg-1 SPP1 0.1 m-Nb2O5 SPP2 0.3 m-Nb2O5 SPP3 2.8 Amorphous