The　corrosion　of　glassy　(Ni8Nb5)(99.5)Sb-0.5　alloy　was　investigated　in　1,　6　mol/L　HCl,　1　mol/L　H2SO4　and　3%　NaCl　solutions,　respectively,　by　immersion　tests　and　electrochemical　measurements　and　compared　with　that　of　pure　Ni,　Nb　and　Sb.　The　stability　of　passive　film　was　studied　using　potentiostatic　current　transients　and　XPS　depth　profiling.　The　surface　morphology　of　the　glassy　alloy　after　electrochemical　potentiodynamic　polarization　test　was　observed　using　SEM.　The　result　indicates　that　the　Ni-Nb-Sb　alloy　shows　good　corrosion　resistance　in　1　mol/L　HCl,　1　mol/L　H2SO4　and　3　wt%　NaCl　solutions.　The　corrosion　resistance,　however,　is　poor　in　6　mol/L　HCl　solution.　The　amorphous　alloy　is　crystallized　after　electrochemical　corrosion　in　chloride　media.　Transpassive　dissolution　is　observed　during　potentiodynamic　polarization　test　in　chloride　media,　which　appears　to　be　associated　with　oxygen　evolution.　At　low　potentials,　the　growth　of　passive　film　is　diffusion-controlled.　At　high　potentials,　however,　the　active　corrosion　is　the　predominant.