目的 提高钕铁硼磁体表面Al防护涂层的结合强度及耐腐蚀性能。方法 通过磁控溅射在钕铁硼磁体表面沉积Al过渡层，用高偏压进行轰击后，使用离子辅助蒸发镀技术沉积Al防护涂层。用扫描电子显微镜观察涂层表面及截面形貌，电化学工作站及盐雾试验检测涂层腐蚀性能，拉伸试验评价涂层与基体结合强度。结果 随着磁控溅射靶电流从10 A提高到25 A，所制备的Al层自腐蚀电压从－0.7367 V递减到－0.9075 V，耐中性盐雾腐蚀性能下降。在用相同工艺制备表面离子辅助蒸发镀Al防护涂层的前提下，磁控溅射靶电流为25 A时制备的100 nm和500 nm过渡层的防护涂层耐盐雾腐蚀时间分别为48 h和36 h，耐腐蚀性能不如无过渡层的纯蒸发镀铝涂层（72 h）；磁控溅射靶电流为15 A制备的100 nm和500 nm过渡层的防护涂层耐盐雾腐蚀时间分别为96 h和103 h，其耐腐蚀性能优于无过渡层的纯蒸发镀铝涂层。采用过渡层技术的Al防护涂层结合强度均大于40 MPa，与钕铁硼基体结合良好。结论 过渡层技术均可使Al涂层与NdFeB基体结合良好，合适的过渡层工艺可提高离子辅助蒸发镀铝涂层的耐腐蚀性能。

The work aims to improve bonding strength and corrosion resistance of Al protective coatings on NdFeB magnets. Al transition layer was deposited on NdFeB magnets by magnetron sputtering, then the transition layer was bombarded at high bias voltage, Al protective layer was deposited by applying ion-assisted evaporation technique. Surface and cross-section morphology of the Al coatings were observed with SEM, corrosion resistance was tested by using electrochemical workstation and salt spray test, and adhesion to substrate was evaluated by performing tensile test. As magnetron sputtering target current increased from 10 A to 25 A, self-corrosion voltage of the as-deposited Al coatings decreased from －0.7367 V to －0.9075 V, and neutral salt spray corrosion resistance decreased as well. Provided that surface ion-assisted evaporated Al protective coatings were prepared in the same process, salt spray corrosion resistance time of Al protective coatings prepared at magnetron sputtering target current of 25 A with a 100 nm and 500 nm Al transition layer was 48 hours and 36 hours, respectively, the corrosion resistance of the coatings with transition layer was inferior to pure evaporated Al coating without transition layer (72h); salt spray corrosion resistance time of Al protective coatings prepared at magnetron sputtering target current of 15 A with a 100 nm and 500 nm Al transition layer was 96 hours and 103 hours, respectively, the corrosion resistance of the coatings with transition layer was superior to pure evaporated Al coating without transition layer. Bonding strength of Al protective coatings adopting transition layer technology was over 40 MPa, the coatings are firmly bonded with the NdFeB substrate. Bonding between Al coating and the NdFeB substrate can be improved by adopting transition layer technology, and corrosion resistance of ion-assisted evaporated Al coating can be improved by applying proper transition layer technology.