In the process of electrodeposition, the magnetic field would generate the magneto hydrodynamic (MHD) effect, which affects the flow and mass transfer of hydrogen evolution. Thus, the performance of electrodeposition coatings will be affected. In this work, Ni/nano-Al₂O₃ coatings prepared by brush plating with magnetic fields were studied. The results show that the magnetic field indeed influences the morphology, texture and wears resistance. The morphology of Ni/Al₂O₃ coating is smooth and uniform; the (200) plane of Ni/Al₂O₃ coating is preferentially oriented in the same direction of a magnetic field; the wear resistance of Ni/Al₂O₃ composite coatings increases due to the uniform distribution of Al₂O₃ particles; and the wear mechanism of coating belongs to adhesive wear. The optimal intensity of magnetic field for Ni/Al₂O₃ composite coatings to obtain a good performance is 0.1 T.

在电沉积过程中，磁场会产生磁流体动力（MHD）效应，影响析氢的流动和传质。因此，电泳涂料的性能会受到影响。本工作研究了磁场刷镀制备的Ni/纳米Al ₂ O ₃涂层。结果表明，磁场确实影响形貌、织构和耐磨性。 Ni/Al ₂ O ₃镀层形貌光滑、均匀； Ni/Al ₂ O ₃涂层的(200)面优先取向于磁场相同方向。由于Al ₂ O ₃颗粒分布均匀，Ni/Al ₂ O ₃复合涂层的耐磨性提高；涂层的磨损机理属于粘着磨损。 Ni/Al ₂ O ₃复合涂层获得良好性能的最佳磁场强度为0.1 T。