Crystallization and corrosion resistance of as-spun (Al 86Ni 9La 5) 98Zr 2 amorphous alloy

(Al 86Ni 9La 5) 98Zr 2 amorphous alloy ribbons were successfully prepared by using the melt spinning technique, and the crystallization behavior of the amorphous ribbons was investigated. The result indicated that the amorphous alloy exhibited a three-step crystallization process with crystallization stages starting at 545 K, 606 K and 641 K, respectively. By annealing treatment at the different temperatures, the samples with the different crystallization extents were obtained. The potentiodynamic polarization measurements on these samples revealed that the sample with the primary crystallization exhibited higher corrosion resistance than that of the as-spun amorphous ribbons, while the secondary and complete crystallization was detrimental to the corrosion resistance of the alloy.