The　corrosion　resistance　and　microstructure　of　anisotropic　Nd-Fe-B　magnet　prepared　by　spark　plasma　sintering　(SPS)　technique　were　studied.　The　SPS　Nd-Fe-B　has　displayed　more　positive　corrosion　potential　E-corr　and　lower　corrosion　current　density　I-corr,　than　those　of　the　conventional　sintered　Nd-Fe-B　with　the　same　composition　in　several　electrolytes,　indicating　better　anti-corrosion　properties.　It　also　shows　good　stability　in　an　oxidized　atmosphere.　The　microstructure　of　SPS　Nd-Fe-B　magnet　indicates　that　the　grain　size　of　Nd2Fe14B　is　fine　(about　6　mum)　and　uniform,　and　the　Nd-rich　phase　does　not　form　along　the　grain　boundaries　of　Nd2Fe14B,　but　agglomerates　into　the　triple　junctions.　Therefore,　the　pathways　for　corrosion　propagation　are　restricted　and　the　inter-granular　corrosion　process　through　Nd-rich　phase　in　the　magnet　is　suppressed　effectively.　As　a　result,　the　SPS　Nd-Fe-B　magnet　possesses　excellent　corrosion　resistance.　(C)　2003　Elsevier　B.V.　All　rights　reserved.