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Chemistry, Structure and Morphology of Native and Passive Oxide Films on Aluminum Rich Amorphous Al-Fe-Ce Alloys.
NAVAL SURFACE WARFARE CENTER SILVER SPRING MD
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Aluminum based metallic glasses are of technological importance due to their high strength, low density, and anticipated high resistance to corrosion. We report on the corrosion characteristics such as corrosion potentials, corrosion currents, and pitting potentials of melt-spun ribbons of Al90Fe10-xCex x 3,5,7. In addition, we have examined the chemistry, structure, and morphology of the native and passive oxide films using X-ray Absorption Fine Structure Spectroscopy, X-ray Photoelectron Spectroscopy and Scanning Electron Microscopy. Passive oxide films were induced by anodizing below the pitting potential in an aqueous solution of 0.9 wt NaCl for 30 and 60 minutes using potentiodynamic polarization techniques.
APPROVED FOR PUBLIC RELEASE