Treatment of titanium prior to bonding
AssigneeBritish Aerospace Public Limited Company
InventorsAlauddin Mahoon, Richard P. J. Kohler
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Abstract
A method of treating articles of titanium or titanium alloy to form an adhesive receptive oxide layer includes the steps of applying to the surface to be treated a mixture of aqueous solutions of sodium hydroxide and hydrogen peroxide, maintaining the applied mixture within a temperature range in which the hydrogen peroxide is relatively stable and causing an increased rate of oxidation at the surface regions. The increased rate of oxidation may be attained either by the addition of a catalyst to the mixture, or by impressing a voltage upon the mixture.
Claims6
A method of treating articles of Titanium or Titanium alloy to form an adhesive receptive oxide layer upon a surface region thereof, which method includes applying to the surface to be treated a mixture of aqueous solutions of sodium hydroxide in a solution concentration of from 0.5 to 5 molar and Hydrogen Peroxide in a solution concentration of from 0.1 to 1 molar, maintaining the applied mixture within a temperature range within which the Hydrogen Peroxide is relatively stable, and impressing a voltage of from 3 to 15 V on the mixture to provide an anodic treatment thereby producing an environmentally stable adhesive bonding surface.
Dependencies are inferred from the claim text.