Hot corrosion-protected articles and manufacture methods

Patent metadata

Field	Value
Publication number	US-10266958-B2
Application number	US-201415036929-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Dec 24, 2013
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A coated article (22) comprises a substrate (100) and a coating system (102) atop the substrate. The coating system has a nickel-based first layer (104) and a chromium-based second layer (108) atop the first layer.

First claim

What is claimed is:

1. A coated article comprising: a nickel-based superalloy substrate; and
a coating system atop the substrate and comprising:
a nickel-based first layer, by weight at least 80% nickel; and
a chromium-based metallic second layer, by weight at least 80% chromium, directly atop the first layer and having an exposed surface and being thicker than the first layer.

2. The coated article of claim 1 being a turbine engine disk.

3. The coated article of claim 1
wherein: the coating system lacks a ceramic layer.

4. A method for manufacturing the coated article of claim 1 , the method comprising:
plating the first layer;
and plating the second layer.

5. The method of claim 4 wherein:
the first layer plating is electroplating.

6. The method of claim 4
wherein: the second layer plating is electroplating.

7. The method of claim 4 further comprising:
forming the substrate by forging of a powder metallurgical material.

8. The method of claim 4 wherein:
the coating system consists of said first layer and said second layer.

9. A method for using the coated article of claim 1 , the method comprising: installing the article in a gas turbine engine; and
running the gas turbine engine to heat the article.

10. A method for manufacturing a coated article, the article comprising: a nickel-base superalloy substrate; and
a coating system atop the substrate and
comprising: a nickel-based first layer;
and
a chromium-based second layer atop the first layer, the method comprising:

plating nickel as by weight at least 80% nickel;
plating chromium as by weight at least 80% chromium directly to the plated nickel; and with a surface of the chromium exposed, heating.

11. The method of claim 10 further comprising: forming the substrate by forging of a powder metallurgical material.

12. The method of claim 10
wherein: the first layer plating is electroplating.

13. The method of claim 10
wherein: the second layer plating is electroplating.

14. The method of claim 10 wherein:
the first layer has a characteristic thickness of 13 micrometers to 51 micrometers; and the second layer is thicker than the first layer and is directly atop the first layer.

15. A coated article comprising: a nickel-based superalloy substrate; and
a coating system atop the substrate and comprising:
a nickel-based first layer, by weight at least 80% nickel; and
a chromium-based metallic second layer, by weight at least 80% chromium, directly atop the first layer, the first layer having a thickness of 15% to 33% of a thickness of the second layer.

16. A method for using the coated article of claim 15 , the method comprising:
installing the article in a gas turbine engine; and
with the second layer having an exposed surface, running the gas turbine engine to heat the article.

17. A coated article comprising:
a nickel-based superalloy substrate; and
a coating system atop the substrate and comprising:
a nickel-based first layer of at least 80% nickel by weight and having a characteristic thickness T 1 of 6 micrometers to 50 micrometers; and a chromium-based metallic second layer of at least 80% chromium by weight atop the first layer and having an exposed surface and being thicker than the first layer.

18. The coated article of claim 17 being a turbine engine disk.

19. A method for manufacturing a coated article, the article comprising: a nickel-base superalloy substrate; and
a coating system atop the substrate and comprising:
a nickel-based first layer having a characteristic thickness T 1 of 6 micrometers to 50 micrometers; and
a chromium-based second layer atop the first layer, the second layer having an exposed surface and being thicker than the first layer,

the method comprising:
plating nickel as by weight at least 80% nickel;
plating chromium as by weight at least 80% chromium;
and with a surface of the chromium exposed, heating.

20. The method of claim 19
wherein: the coated article is a turbine engine disk.

Assignees

• United Technologies Corp

Inventors

• Task Michael N

Classifications

• C23C18/1653

  Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• F05D2300/132

  Chromium · CPC title

• C23C28/023

  only coatings of metal elements only · CPC title

• F01D25/005

  Selecting particular materials · CPC title