纳米流体对聚变堆材料流动腐蚀的实验研究

设计了旋转叶片式纳米流体腐蚀实验装置,以ITER堆内部件水冷设计方案为参考条件,开展了两种质量分数(0.01%和1%)氧化铝纳米流体对聚变堆结构材料RAFM钢、316L(N)钢及管道热沉材料CuCrZr合金等样品服役条件下的腐蚀实验。样品的SEM、EDS、XPS分析结果表明:两种质量分数的纳米流体对RAFM钢、316L(N)钢的腐蚀轻微,与纳米流体呈现良好的相容性;CuCrZr合金表面生成一层氧化膜,表面腐蚀形貌呈现出点坑及裂纹;腐蚀时间、纳米流体流速及纳米颗粒含量对腐蚀程度和表面形貌影响显著;CuCrZr合金表面发生了吸氧腐蚀与冲刷腐蚀,两者的耦合效应加速了腐蚀进程。

Corrosion Study on Fusion Reactor Material in Flowing Nanofluid

Based on the ITER water-cooling program ,rotating test devices were built to investigate the compatibility of the fusion reactor materials RAFM steel ,316L (N ) steel ,and CuCrZr alloy with the Al2 O3-water nanofluids in this study .The corrosion experiments were performed in nanofluids with different mass fractions of 0.01% and 1% ,respectively . The observation and analysis on the specimen surfaces were per-formed by SEM ,EDS ,and XPS after corrosion experiments .It is shown that different mass fractions of nanofluids have slight effects on the corrosion performance of RAFM steel and 316L(N) steel and there are good compatibilities between RAFM steel ,316L (N) steel and nanofluids .The surface of CuCrZr alloy is covered by oxide film with holes and cracks .Furthermore ,the surface morphology of CuCrZr alloy in nanofluids is strongly dependent on the testing duration , flowing velocity and mass fraction of nanofluids .The corrosion mechanism is dominated by oxygen absorption corrosion and mechanical erosion .The coupling effect of the two corrosions accelerates the corrosion process .