ZINC-DIFFUSED ALLOY COATING FOR CORROSION/HEAT PROTECTION
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a zinc-diffused nickel alloy coating for corrosion and heat protection and to a method for forming such a coating. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer on a substrate, applying a layer of zinc over the nickel or nickel alloy coating layer, and thermally diffusing the zinc into the nickel alloy coating layer. The coating method may further comprise immersing the coated substrate in a phosphated trivalent chromium conversion solution either before or after the diffusing step. The substrate may be a component used in a gas turbine engine, which component is formed from a steel material.
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Citations
37 Claims
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1-18. -18. (cancelled)
- 19. A substrate having at least one surface and a coating on said at least one surface, said coating having a first layer formed from nickel or a nickel alloy applied to said at least one surface and a second layer formed from zinc applied over said first layer, said first layer having zinc atoms diffused therein, and said substrate being formed from a deoxidized low carbon steel.
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20. (cancelled)
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25. (cancelled)
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26. A component for use in a gas turbine engine comprising:
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a steel substrate formed from a low carbon steel; and
a zinc diffused nickel alloy coating on said steel substrate, said coating having a first layer formed from a nickel alloy deposited on and in contact with a surface of said substrate and a second layer formed from zinc deposited on said first layer and said first layer having zinc atoms diffused therein. - View Dependent Claims (28, 29, 30, 31, 32)
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27. A method for forming a corrosion and heat protective coating on a gas turbine engine component comprising the steps of:
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providing a substrate formed from a low carbon steel;
forming a nickel alloy coating layer on said substrate;
applying a layer of zinc over said nickel alloy coating layer; and
diffusing the zinc into said nickel alloy coating layer. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification