Durability of adhesively bonded aluminum structures and method f

Details Durability of adhesively bonded aluminum structures and method f Durability of adhesively bonded aluminum structures and method f

1980-06-16

1981-12-29

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 315, C23F 714

Patent

active

043080790

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.

REFERENCES:
patent: 3634146 (1972-01-01), Wystrach
patent: 3900370 (1975-08-01), Germscheid et al.
patent: 4252857 (1981-02-01), Heine et al.

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