Treatment for the alleviation of high temperature oxidation of aluminum
AssigneeReynolds Metals Company
InventorsMichael E. Thurston, William A. Cassada, III, Daniel J. Schardein
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Abstract
High Temperature Oxidation (HTO) of aluminum subjected to heat treatment is controlled by exposing the aluminum surface to a metal chloride prior to heat treatment. Transition metal chlorides are preferred for such treatment.
Claims12
A method for the control of high temperature oxidation in aluminum materials to be subjected to solution heat treatment consisting of exposing the surface of the aluminum material to an aqueous solution consisting of a transition metal chloride prior to said solution heat treatment.
A method for the control of high temperature oxidation in aluminum materials to be subjected to solution heat treatment consisting of exposing the surface of the aluminum material for a period of between about 5 and about 300 seconds, to an aqueous solution consisting of from about 0.5 to about 25% by weight of a transition metal chloride;
- and having a pH between about 0.5 and about 2, without wiping or rinsing, prior to the heat treatment.
Dependencies are inferred from the claim text.