Abstract: Fe<sub<50-<em<x</em<</sub<Mo<sub<14</sub<Cr<sub<15</sub<C<sub<15</sub<B<sub<6</sub<Y<sub<<em<x</em<</sub< (<em<x</em<=0,2) amorphous alloy ribbons were prepared by single roller method. The structures, glass-forming ability (GFA), thermal stability, crystallization process and corrosion behavior of the amorphous alloys were investigated by means of X-ray diffraction, differential scanning calorimetry, transition electron microscopy and potentiodynamic polarization experiments. The results showed that the Fe<sub<50-<em<x</em<</sub<Mo<sub<14</sub<Cr<sub<15</sub<C<sub<15</sub<B<sub<6</sub<Y<sub<<em<x</em<</sub< (<em<x</em<=0,2) alloys can be prepared into amorphous alloy ribbons. The amorphous content, GFA and thermal stability of the amorphous alloys are extremely enhanced with yttrium addition. The predominant crystalline phases precipitated after the crystallization process are <em<α</em<-Fe, Fe<sub<23</sub<B<sub<6</sub<, Cr<sub<23</sub<C<sub<6</sub< and Fe<sub<3</sub<Mo<sub<3</sub<C. The amorphous alloys exhibit higher corrosion resistance in 3.5%NaCl aqueous solution compared with stainless steel Cr<sub<18</sub<Ni<sub<9</sub<Ti, and show wider passive region and lower passive current density with yttrium addition.