Mixed acid anodization
AssigneeRaytheon Technologies Corporation
InventorsLei Chen, Mimi Nguyen-Vu
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Abstract
Disclosed are methods of anodizing a metal component. In the methods an anodization bath includes an organic acid.
Claims20
A method of making an anodized metal component comprising anodizing a metal component in an anodizing bath to form an anodization layer wherein the anodizing bath comprises two or more inorganic acids selected from the group consisting of sulfuric, boric and phosphoric acids, and an organic acid selected from the group consisting of oxalic acid, acetic acid, tartaric acid, malic acid, tannic acid, an α-amino acid, an aromatic alpha hydroxy acid, phenylalanine, and salicylic acid.
A method of making an anodized metal component comprising anodizing a metal component in a first anodizing bath to form an initial anodization layer and anodizing the metal component with the initial anodization layer in a second anodizing bath to form a metal component with a final anodization layer wherein the first and second anodizing baths comprise at least one inorganic acid selected from the group consisting of sulfuric acid, boric acid and phosphoric acid, and an organic acid and the first anodizing bath and the second anodizing baths have different compositions and operating temperatures.
A method of making an anodized metal component comprising anodizing a metal component in a first anodizing bath to form an initial anodization layer and anodizing the metal component with an initial anodization layer in a second anodizing bath to form a metal component with a final anodization layer wherein the first anodizing bath comprises at least one inorganic acid selected from the group consisting of sulfuric acid, boric acid and phosphoric acid, and an organic acid and the second anodizing bath comprises at least two inorganic acids selected from the group consisting of sulfuric acid, boric acid and phosphoric acid.
Dependencies are inferred from the claim text.