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US 2006/0222880 A1Published application
Nickel coating
AssigneeUnited Technologies Corporation
InventorThomas Hanlon
Life of this patent
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Abstract
A Ni-based first material is deposited on a substrate by electroless plating. A Zn-based second material is deposited on the first material. One or more components of at least one of the first and second materials are diffused into the other. The diffusion creates a ZnNi alloy layer enhancing corrosion resistance.
Claims22
A method for coating comprising:
- applying a Ni-based first material atop a substrate by electroless plating;
- applying a Zn-based second material atop the first material;
- and
- diffusing one or more components of at least one of the first and second materials into the other.
1 more element
A method for coating comprising:
- applying by electroless plating a Ni-based first material atop a substrate;
- applying a Zn-based second material atop the first material;
- and
- a step for forming a NiZn alloy from the first and second materials.
1 more element
A coated article comprising:
- a substrate;
- and
- a coating system having a compositional gradient having:
- a first region having:
- a Ni content of at least 50%;
- a B content of at least 1%;
- and
- a thickness of at least 10 μm;
- and
- a second region outboard of the first region and having:
- a Zn content of at least 50%;
- a Ni content of at least 10%;
- and
- a thickness of at least 4 μm.
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Dependencies are inferred from the claim text.