... 2)Garde:N35-N38-N42-N50 3)Shape:Disc 4)coating:Ni,Zn,Au,Ag,epoxy 5)SGS,CE.ISO9001:2000 ... treatmentNi,NiCuNi,Zn,Black Expoxy,Black Nickel,Ag,AU,etc coating.4)Application:Acoustics,Motors,Windmill,Transportation,IT industryequipments,Home appliance,Loudspeaker ... .7-12.0≥30≥0.8533-36200 Surface treatment The coating of sintered NdFeB magnet and its corrosion resistance:CoatingZnNiNi-Cu ...