Examination of Galvanic Action between Fe-Based Bulk Metallic Glass and Crystalline Alloys

Fe-based bulk metallic glasses (amorphous metals) have been developed, and several compositions are shown to have excellent corrosion resistance in chloride solutions. Further, thermal-spray amorphous metals are being developed for use as a barrier coating layer, to protect substrate materials from...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2009-06, Vol.40 (6), p.1334-1343
Main Authors: Ha, Hung M., Payer, Joe H.
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Bond strength
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion potential
Corrosion resistance
Exact sciences and technology
Galvanized steel
Iron
Materials Science
Melt spinning
Metallic Materials
Metals
Metals. Metallurgy
Nanotechnology
Nuclear fuels
Radioactive wastes
Silicon carbide
Structural Materials
Surfaces and Interfaces
Symposium: Iron Based Amorphous Metals: An Important Family of High-Performance Corrosion-Resistant Materials
Technological change
Temperature
Thin Films
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Summary:Fe-based bulk metallic glasses (amorphous metals) have been developed, and several compositions are shown to have excellent corrosion resistance in chloride solutions. Further, thermal-spray amorphous metals are being developed for use as a barrier coating layer, to protect substrate materials from corrosion. Galvanic action between dissimilar metals and the coating/substrate for the amorphous-alloy coatings is of practical interest for a number of applications. The mixed-potential theory provides a useful approach for examining the corrosion behavior of the component materials in the galvanic couple and is applied in this study. Galvanic action was studied for an Fe-based structurally amorphous metal (SAM) 1651 and several crystalline alloys that included 1018 C-steel, stainless steel (SS) 316L, and alloy 22. Anodic and cathodic polarization curves of each of the metals were measured by potentiodynamic polarization. Based on the mixed-potential theory, the behavior of the component materials in a galvanic cell was predicted. The predictions are compared to the measured behavior of galvanic couples with the crystalline alloys.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-008-9653-8