Spark　plasma　sintering　(SPS)　and　conventional　sintering　techniques　were　used　to　fabricate　sintered　Nd-Fe-B　permanent　magnets.　The　corrosion　behaviors　of　both　magnets　in　sodium　chloride　(NaCl),　sodium　hydroxide　(NaOH),　and　sulfuric　acid　(H(2)SO(4))　solutions　were　studied.　The　weight-loss　curves　indicate　that　both　magnets　exhibit　passive　behavior　in　alkaline　solution　and　dissolve　actively　in　acid　solution.　SEM　observations　show　that　the　conventional　sintered　Nd-Fe-B　magnets　exhibit　typical　intergranular　corrosion.　In　the　SPS　magnet,　however,　intergranular　corrosion　through　the　Nd-rich　phase　is　suppressed　effectively　due　to　the　unique　microstructure　of　the　magnets,　i.e.,　the　grain　size　of　the　Nd(2)Fe(14)B　main　phase　is　fine　and　uniform,　and　the　fine　Nd-rich　phase　does　not　form　along　the　grain　boundaries　of　main　phase　as　with　conventional　magnets,　but　agglomerates　into　the　triple　junctions.　As　a　result,　the　SPS　Nd-Fe-B　magnets　possess　excellent　corrosion　resistance.