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US 2016/0017481 A1Published application
Chromium-enriched diffused aluminide
AssigneeUnited Technologies Corporation
InventorsMark A. Livings, Chelsea Brown
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Abstract
A method of applying a protective coating to an article comprises the steps of a) depositing aluminum in a surface region of an article, and b) depositing chromium is the surface region of the article subsequent to step a), whereby at least a portion of the chromium replaces at least a portion of the aluminum. Another method and an article are also disclosed.
Claims20
A method of applying a protective coating to an article, comprising the steps of:
- a) depositing aluminum in a surface region of an article;
- and
- b) depositing chromium is the surface region of the article subsequent to step a), whereby at least a portion of the chromium replaces at least a portion of the aluminum.
A method of applying a protective coating to an article, comprising the steps of:
- a) vapor depositing aluminum in a surface region of an article formed of a low-chromium nickel-based alloy;
- b) vapor depositing chromium in the surface region of the article while removing at least a portion of the aluminum using an activator;
- and
- c) heating the article such that the chromium replaces at least a portion of the aluminum through action of the activator.
1 more element
An article, comprising:
- a base alloy;
- a corrosion-resistant coating on the base alloy, the corrosion-resistant coating containing a region of approximately 20%-40% chromium;
- and
- an aluminum diffusion zone disposed between the base alloy and the corrosion-resistant coating.
1 more element
Dependencies are inferred from the claim text.