Nickel Plating

WO2024259076A3 Publication Date: 2025-03-27RTX CORP
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Patent Information

Application Number
PCT/US2024/033767
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-12
Filing Date
2024-06-13
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Gas turbine engines with nickel-based superalloy components face challenges in dimensional restoration due to surface wear or damage, particularly in areas inaccessible to thermal spray guns, and require effective abrasive coatings for blade tips.

Method used

A method involving a chromium-containing nickel sulfamate plating solution, optionally with alumina, is applied to a metallic substrate using an electroplating process, where chromium particulates are blended with the solution and diffused into the nickel layer upon heat treatment, forming a durable and corrosion-resistant coating.

Benefits of technology

The resulting chromium-nickel alloy layer provides enhanced mechanical properties, resistance to interdiffusion, and improved oxidation resistance, effectively restoring worn surfaces and providing a suitable matrix for abrasive coatings in gas turbine engines.

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Abstract

A plating method includes: providing a nickel-containing plating solution; immersing a metallic substrate in the plating solution; and applying a voltage between the substrate and an anode to apply a plating. The providing comprises blending chromium powder with a precursor of the plating solution so that the plating solution is a Cr-containing plating solution. The as-applied plating forms a layer containing chromium particles from the powder.
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