Method for compacting an anti-corrosive paint of a turbine engine part

Patent metadata

Field	Value
Publication number	US-2022410208-A1
Application number	US-202017771738-A
Country	US
Kind code	A1
Filing date	Oct 27, 2020
Priority date	Oct 31, 2019
Publication date	Dec 29, 2022
Grant date	—

Abstract

A method compacts an anti-corrosive paint having metal particles of a mechanical part such as a turbine engine part. The mechanical part extends along a longitudinal axis X and has a radially outer surface covered with a first layer of anti-corrosive paint. The method includes at least one step of generating a laser beam on the first layer of anti-corrosive paint to bring the metal particles into contact and to render the anti-corrosive paint electrically conductive.

First claim

1 . A method for compacting an anti-corrosive paint comprising metal particles of a mechanical part such as a turbine engine part, the mechanical part extending along a longitudinal axis X and comprising a radially external surface coated with a first layer of anti-corrosive paint, the method comprising at least one step of generating a laser beam on the first layer of anti-corrosive paint so as to bring the metal particles into contact and to render the anti-corrosive paint electrically conductive.

2 . The method according to claim 1 , further comprising a step of installing the mechanical part in an enclosure configured to receive an inert gas.

3 . The method according to claim 1 , wherein contact of the metal particles is determined by a heating of the metal particles to a threshold temperature value less than or equal to a melting temperature of the material of the metal particles.

4 . The method according to claim 1 , wherein a power of the laser beam is between 200 and 1000 W.

5 . The method according to claim 1 , wherein the laser beam consists of a single beam with an emission wavelength between 1000 and 1500 nm.

6 . The method according to claim 1 , wherein the laser beam scans the first layer of anti-corrosive paint on the mechanical part along a helical path.

7 . The method according to claim 6 , further comprising a step of moving the laser beam along a first direction orthogonal to the longitudinal axis X, the mechanical part being rotated about the longitudinal axis X and translated along the longitudinal axis X.

8 . The method according to claim 1 , wherein the mechanical part is hollow.

9 . The method according to claim 8 , wherein the mechanical part comprises a radially internal surface coated with a second layer of anti-corrosive paint, and the laser beam is generated inside the mechanical part and reflected inside the mechanical part so as to reach the second layer of anti-corrosive paint, the laser beam scanning the second layer of anti-corrosive paint along a helical path.

10 . The method according to claim 1 , wherein the mechanical part is a turbine engine shaft.

11 . The method according to claim 1 , wherein the laser is of the Nd:YAG type.

12 . The method according to claim 1 , wherein the metal particles of the paint comprise aluminium.

13 . The method according to claim 1 , wherein the anti-corrosive paint is applied by spraying a liquid paint loaded with metal particles onto at least one surface of the mechanical part and polymerizing the paint sprayed on the part so as to obtain a layer of anti-corrosive paint intended to protect the part.

14 . The method according to the claim 2 , wherein the inert gas is at least one of nitrogen or argon.

Assignees

• Safran Aircraft Engines

Inventors

• Grunenwald Anthony Cyrille
• Piette Romaric Jean-Marie

Classifications

• C09D5/08

  Anti-corrosive paints · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• C23C26/00 Primary

  Coating not provided for in groups C23C2/00 - C23C24/00 · CPC title

• B05D1/02

  performed by spraying · CPC title

• C23C24/085

  Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides · CPC title