Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T02:00:06.781Z Has data issue: false hasContentIssue false
  • English
  • Français

Corrosion Protection of at Alloys by Solution Cast Ta2O5

Published online by Cambridge University Press:  22 February 2011

Yeong C. Lin  and
Stephen T. Wellinghoff
Yeong C. Lin
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
Stephen T. Wellinghoff
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455
Get access

Abstract

A newly developed amorphous, corrosion resistant Ta2O5 coating in saturated H2/H2O/Cl2 environment was studied by scanning and transmission electron microscopy and surface spectroscopy. Although Ta2O5 films formed on polished Al single crystal surfaces by sputter deposition of Ta and subsequent anodization effectively prevent the Al from corrosion by water saturated with chlorine, Al alloy surfaces are not protected, since the anodic film formed over grain boundaries, processing lines, and emergent Precipitates is poorly adherent, thus providing loci for corrosion. This problem was eliminated by casting a 400Å layer of tantalum oxyhydroxide polymer from ethanol solution onto the Al alloy substrate and curing to a Ta2O5 layer that effectively resisted attack by wet chlorine.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 40: Symposium J – Electronic Packaging Materials Science I , 1984 , 97
Copyright
Copyright © Materials Research Society 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Shreir, L. L., “Corrosion” (Vol. II), Butterworth, Boston (1976).Google Scholar
2. Ralbald, E., “Corrosion Guide”, Elsevier Publ. London (1968).Google Scholar
3. Hollingsworth, W. W., et. al., “Aluminum”, 1, ASM (1967) 209.Google Scholar
4. Ketcham, S. J. “Finishing of Aluminum”, Reinhold Publ. (1963) 91.Google Scholar
5. Gaynes, N. I., “Metal Finishing”, 59 (1961) 75.Google Scholar
6. Wernick, S., and Dinner, S. R., “Surface Treatment of Aluminum”, Vol.1, 4th Ed., Robert Draper, Ltd., Teddington (1972).Google Scholar
7. Wellinghoff, S. T. and Lin, Y. C. “Corrosion Resistant Tantalum Pentaoxide Coatings” U. S. Patent applied (1984).Google Scholar
8. Lin, Y. C. and Wellinghoff, S. T., submitted to J. Electrochem. Soc. (1984).Google Scholar
9. Bradley, D. C., et. al., J. Chem. Soc., (1955) 467.Google Scholar
10. Katzmann, H. A., J. Appl. Surf. Sci., (1979) 2416.Google Scholar
11. Shreir, L. L., “Corrosion” (Vol. I.) Butterworth, Boston (1976).Google Scholar