Improved corrosion resistance of new Fe-based amorphous alloys

Abstract

Developing amorphous alloys with good corrosion resistance has attracted wide interests recently. In this work, a series of Fe[Formula: see text]Ni[Formula: see text]Cu 1 Nb 3 Si[Formula: see text]B 9 ([Formula: see text], 1, 2, 3 and 4 at.%) amorphous alloys are fabricated. The influence of Ni addition on the structure and corrosion resistance of the alloys in KNO 3 solution was investigated. The amorphous ribbons showed excellent corrosion resistance due to the formation of a stable passive film that ensured a very large passivation plateau. The corrosion resistance is sensitive to the minor addition of Ni ([Formula: see text]4 at.%), which significantly improved the corrosion resistance according to the results of electrochemical measurements.