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US 9,790,613 B2Granted
Aluminum alloy anodization
AssigneeGoodrich Corporation
InventorsEllie L. Cochien, Khalid Hussain, Edward Benedict Evans
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Abstract
The present disclosure describes methods for anodizing aluminum alloys, including 7000 series aluminum alloys, and creating metal components, including aircraft landing gear components, from the aluminum alloys.
Claims17
A method of coating an aluminum alloy comprising:
- deoxidizing the aluminum alloy using a chrome deoxidizing agent that is non-hexavalent to create a deoxidized aluminum alloy;
- after deoxidizing the aluminum alloy to create the deoxidized aluminum alloy, anodizing the deoxidized aluminum alloy by subjecting the deoxidized aluminum alloy to an electrolytic process comprising passing a voltage between about 15 V and about 16 V through a sulphuric acid to create an anodized aluminum alloy having an anodized layer having a coating weight of less than 10 g/m2;
- and
- after anodizing the deoxidized aluminum alloy to create the anodized aluminum alloy, sealing the anodized aluminum alloy with a trivalent chromium solution to create a sealed anodized aluminum alloy.
1 more element
A method comprising:
- processing an aluminum alloy to form an aluminum alloy component;
- deoxidizing the aluminum alloy component using a chrome deoxidizing agent that is non-hexavalent to create a deoxidized aluminum alloy component;
- after deoxidizing the aluminum alloy component to create the deoxidized aluminum alloy component, anodizing the deoxidized aluminum alloy component by subjecting the deoxidized aluminum alloy component to an electrolytic process comprising passing a voltage of between about 15 V and about 16 V through a sulphuric acid to create an anodized aluminum alloy component having an anodized layer having a coating weight of less than about 10 g/m2;
- and
- after anodizing the deoxidized aluminum alloy component to create the anodized aluminum alloy component, sealing the anodized aluminum alloy component with a chromium sealing solution that is non-hexavalent to create a sealed anodized aluminum alloy component.
2 more elements
Dependencies are inferred from the claim text.