Method for increasing the corrosion resistance of aluminum and aluminum alloys
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United States of America
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Jul 29, 1997
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Sep 28, 1995
filing date -
Jun 21, 1991
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Abstract
Aluminum and aluminum alloys are protected from corrosion by immersion in an alkaline lithium or alkaline magnesium salt solution. Immersion in the salt solution causes the formation of a protective film on the surface of the aluminum or aluminum alloy which includes hydrotalcite compounds. A post film formation heat treatment significantly improves the corrosion resistance of the protective film.
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