The corrosion behavior of glassy and devitrified Fe80B20(1) and Co80B20 alloys has been investigated and compared with that of crystalline Fe and Co in buffered acidic and basic solutions. The glassy ribbons were examined by x-ray diffraction (XRD) and scanning electron microscopy (SEM) before and after heat treatment. It has been found that the development of compositional inhomogeneity in a glassy alloy during crystallization will not necessarily lead to an increase in the dissolution rate or to instability of the passive state. The glassy alloys do not have a greater ability to passivate or more stable passivity than the crystalline metal in the same solution.

Subject
Scanning electron microscopy, Ribbons, X-ray diffraction, Stability, Glass, Metal surfaces, Anodic polarization curves, Roughness, Dissolution, Anode surfaces, Annealing, Alloys, Passivity
National Association of Corrosion Engineers
1987
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