Method for Coating a Component

Patent metadata

Field	Value
Publication number	US-2025198005-A1
Application number	US-202318846610-A
Country	US
Kind code	A1
Filing date	Mar 17, 2023
Priority date	Mar 17, 2022
Publication date	Jun 19, 2025
Grant date	—

Abstract

A method for producing a coated chromium-containing component includes providing a coating mixture of a solvent and a source of praseodymium and/or a source of terbium, contacting the surface of the component with the coating mixture, optionally drying, and heating the component in an oxidising atmosphere at a temperature of 450° C. or higher. Examples include coated components for a device, and electrochemical devices with coated components, the components having a surface coating including at least one layer that includes a praseodymium material and/or terbium material. The method produces coatings that reduce chromium evaporation and are useful as barriers on a chromium-containing components.

First claim

1 . A method for producing a coated component, the method comprising
a) providing a chromium-containing component, b) providing a coating mixture comprising at least one solvent, and a source of praseodymium and/or a source of terbium, c) contacting at least one surface of the component with the coating mixture, d) drying the component, and e) heating the component in an oxidising atmosphere at a temperature of 450° C. or higher.

2 . A method as claimed in claim 1 , wherein the source of praseodymium and/or the source of terbium is a source of Pr(III) and/or Tb(III).

3 . A method as claimed in claim 2 , wherein the source of Pr(III) comprises a Pr(III) salt and/or chelated Pr(III), and/or the source of Tb(III) comprises a Tb(III) salt and/or chelated Tb(III).

4 . A method as claimed in claim 1 , wherein the method further comprises repeating steps a) to c), thereby producing a coated component having a coating comprising a plurality of layers.

5 . A method as claimed in claim 1 , wherein the coating is electrically conductive.

6 . A method as claimed in claim 1 , wherein the coating has a thickness in the range 50 nm to 1 μm, preferably the coating has a thickness in the range 50 nm to 500 nm.

7 . A method as claimed in claim 1 , wherein the component comprises a metallic alloy comprising chromium.

8 - 9 . (canceled)

10 . (canceled)

11 . A method as claimed in claim 1 , wherein the coating mixture is in the liquid state, and preferably comprises a coating solution.

12 . A method as claimed in claim 1 , wherein the solvent comprises an alcohol.

13 . (canceled)

14 . A method as claimed in claim 1 , wherein contacting at least one surface of the component with the coating mixture comprises dip coating the component in the coating mixture and/or spray coating the component with the coating mixture.

15 . (canceled)

16 . A method as claimed in claim 1 , wherein the oxidising atmosphere comprises air.

17 . (canceled)

18 . A coated component for a device, the coated component being obtainable by a method as claimed in claim 1 .

19 . A coated component for a device, the coated component comprising a chromium-containing component, the component having at least one surface bearing a coating comprising at least one layer comprising a praseodymium material and/or terbium material.

20 . A coated component as claimed in claim 19 , wherein the device is for operation at a temperature of 450° C. or higher.

21 . A coated component as claimed in claim 19 , wherein the coating comprises two or more layers, each layer comprising a praseodymium material and/or a terbium material.

22 . A coated component for a device as claimed in claim 19 , wherein the device comprises an electrochemical cell.

23 . A coated component for a device as claimed in claim 22 , wherein the component comprises an interconnect, a spacer, a metal plate or a substrate.

24 . A coated component for a device as claimed in claim 19 , wherein the device comprises a system comprising a stack of electrochemical cells.

25 . A coated component for a device as claimed in claim 24 , wherein the component comprises a pipe fitting, a fastening, a valve component, a pipe, or a heat exchanger.

26 . An electrochemical device comprising a coated component, the coated component comprising a chromium-containing component with at least one surface bearing a coating comprising at least one layer comprising a praseodymium material and/or a terbium material.

27 . (canceled)

Assignees

• Ceres Ip Co Ltd

Inventors

• Leah Robert

Classifications

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• H01M8/2465

  Details of groupings of fuel cells · CPC title

• H01M8/0228

  in the form of layered or coated products · CPC title

• H01M8/0215

  Glass; Ceramic materials · CPC title

• H01M8/021

  Alloys based on iron · CPC title