Durability of adhesively bonded aluminum structures and method for inhibiting the conversion of aluminum oxide to aluminum hydroxide
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United States of America Patent
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Dec 29, 1981
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N/A
app pub date -
Jun 16, 1980
filing date -
Jun 16, 1980
priority date (Note) -
Expired
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Abstract
It has been found that hydration of aluminum oxide surface coatings to aluminum hydroxide may be curtailed by the presence of corrosion inhibiting amounts of amino phosphonate compounds. Effective inhibitors, such as nitrilotris (methylene) triphosphonic acid, may be applied to aluminum substrates having aluminum oxide surfaces thereupon in concentrations of less than 50% by weight in aqueous solution, and suitably from 1 to about 500 ppm.
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