“…In addition, the Ni-P coatings containing fine dispersed ceramic particles have also attracted a great deal of attention in industrial area [13][14][15][16] . Some research results indicated that a combination of dissimilar materials, such as distributed nano-Al 2 O 3 , SiC, ZrO 2 , CeO 2 or Si 3 N 4 particles, can produce a coating with good chemical, mechanical, electrical, and optical properties [17][18][19][20][21][22][23] . Sintered NdFeB permanent magnet has a substantial drawback in corrosion resistance.…”