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Corrosion Resistant Coatings for Aluminum by Hydrothermal Film Formation in Alkaline Li-Salt Solutions

Published online by Cambridge University Press:  10 February 2011

R.G. Buchheit ,
M.A. Martinez  and
C.B. Cooper
R.G. Buchheit
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185, rgbuchh@sandia.gov
M.A. Martinez
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185, rgbuchh@sandia.gov
C.B. Cooper
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185, rgbuchh@sandia.gov
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Abstract

New methods of forming corrosion resistant inorganic coatings on Al and Al alloys are required due to environment and work safety hazards associated with the currently used Cr-based coatings technologies. In this paper we report on certain specific aspects of Al surface film formation that can be exploited to form highly corrosion resistant coatings. The aspects discussed include: formation of hydrotalcite surface films, Li2[Al2 (OH)6]2 CO3nH2O, by exposure to Li-salt solutions, elimination of unwanted Cu compounds that accumulate surface films formed on Cubearing Al alloys, and generation of high corrosion resistance by precipitating transition metal oxides on to alkaline hydrotalcite coated surfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 432: Symposium S – Aqueous Chemistry and Geochemistry of Oxides , 1996 , 273
Copyright
Copyright © Materials Research Society 1997

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References

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