利用电化学测试技术和材料分析方法研究了择优取向对热压/热变形纳米NdFeB磁体腐蚀行为的影响。结果表明:不同取向的热压/热变形纳米NdFeB磁体的腐蚀行为相似,但与取向轴平行截面相比,与取向轴垂直截面具有更大的局部腐蚀倾向性以及更快的溶解速率;不同取向的热压/热变形纳米NdFeB磁体均发生Nd的优先腐蚀,且与取向轴垂直截面腐蚀产物膜中O的原子分数略大;富Nd相面积分数以及晶界数的差异是导致不同取向的热压/热变形纳米NdFeB磁体腐蚀行为差异的主要原因。 The effects of preferential orientation on the corrosion behavior of hot-pressed / hot-deformed NdFeB magnets were investigated using electrochemical testing techniques and material analysis methods. The results show that the corrosion behavior of hot-deformed / hot-deformed NdFeB magnets with different orientations is similar, but they have a larger local corrosion tendency and a faster dissolution rate than the parallel cross-section of the orientation axis. Different orientations Of the hot-pressed / hot-deformed NdFeB magnets all exhibit preferential corrosion of Nd, and the atomic fraction of O in the film of the corrosion products perpendicular to the orientation axis is slightly larger; the difference of the Nd-rich phase fraction and the number of grain boundaries is the cause of the different orientation heat CORROSION BEHAVIOR OF PRESSURE / HOT DEFORMED NANO-NdFeB MAGNETS.