Abstract
Some of amorphous alloys have very high corrosion resistance. However, there are few studies on corrosion phenomena of metallic glasses. The corrosion resistance of alloys is generally related with composition and structure of surface films of the alloys. Therefore, not only investigation of corrosion resistance, but also study on surface film characterization is important. In this paper, corrosion resistance of Zr-, Ni-, Fe- and Cu-based bulk bulk metallic glasses was reviewed. A general trend of preparation of corrosion resistant bulk metallic glasses was made clear. It was found that addition of such an element as Nb, Ta, Ti, Cr, Mo and P was effective for the corrosion resistance. It was also clarified that the effectiveness depended on alloy systems and environments. Co-addition of Ni and Nb was effective in preventing from decrease of glass forming ability together with increase in corrosion resistance. However, when the amount of addition of these elements exceeded a certain level, the glass forming ability of the alloy decreased, and accordingly it led deterioration in corrosion resitance of the alloy.
