Device intended for implementing an anodization treatment and anodization treatment

Patent metadata

Field	Value
Publication number	US-10329685-B2
Application number	US-201515307237-A
Country	US
Kind code	B2
Filing date	Apr 20, 2015
Priority date	Apr 30, 2014
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A device for performing anodizing treatment on a part, the device including a treatment chamber including a part for anodizing together with a counter-electrode situated facing the part to be treated, the part to be treated constituting a first wall of the treatment chamber; a generator, a first terminal of the generator being electrically connected to the part to be treated and a second terminal of the generator being electrically connected to the counter-electrode; and a system for storing and circulating an electrolyte, the system including a storage vessel, different from the treatment chamber, for containing the electrolyte; and a circuit for circulating the electrolyte in order to enable the electrolyte to flow between the storage vessel and the treatment chamber.

First claim

The invention claimed is:

1. A device for performing anodizing treatment on a part, the device comprising:
a treatment chamber comprising a part to be treated and a counter-electrode situated facing the part to be treated, the part to be treated constituting a first wall of the treatment chamber and the counter-electrode constituting a wall of the treatment chamber situated facing the first wall;
a generator, a first terminal of the generator being electrically connected to the part to be treated and a second terminal of the generator being electrically connected to the counter-electrode; and
a system for storing and circulating an electrolyte, the system comprising:
a storage vessel, different from the treatment chamber, for containing the electrolyte, the treatment chamber having a volume that is less than the volume of the storage vessel; and
a circuit for circulating the electrolyte in order to enable the electrolyte to flow between the storage vessel and the treatment chamber,

wherein the counter-electrode is arranged not to be immersed in the electrolyte.

2. The device according to claim 1 , further comprising at least one sealing gasket constituting a second wall of the treatment chamber, the second wall being different from the first wall.

3. The device according to claim 1 , wherein the system for storing and circulating the electrolyte further includes a pump for driving circulation of the electrolyte through said system.

4. The device according to claim 1 , wherein the ratio (volume of the treatment chamber)/(volume of the storage vessel) is less than or equal to 0.2.

5. The device according to claim 1 , wherein the circuit for circulating the electrolyte comprises:
a first channel for enabling the electrolyte coming from the storage vessel to flow to the treatment chamber; and
a second channel for enabling the electrolyte to flow from the treatment chamber to the storage vessel.

6. A method of anodizing a part, the method comprising the following steps:
forming a coating on a surface of the part by anodizing treatment using a device according to claim 1 , an electrolyte being present in the treatment chamber during the anodizing treatment, and the electrolyte flowing in the electrolyte circulation circuit during the anodizing treatment.

7. The method according to claim 6 , wherein the anodizing treatment is micro arc oxidation treatment.

8. The method according to claim 6 , wherein during the anodizing treatment:
the electrolyte coming from the storage vessel flows to the treatment chamber through a first channel; and
the electrolyte flows from the treatment chamber to the storage vessel through a second channel.

9. The method according to claim 6 , wherein the electrolyte present in the treatment chamber is continuously renewed during the anodizing treatment.

10. The method according to claim 6 , wherein the electrolyte flows in the electrolyte circulation circuit at a flow rate lying in the range 0.1 times to 10 times the volume of the treatment chamber, per minute.

11. The method according to claim 8 , wherein it further includes a step of filtering the electrolyte flowing in the second channel prior to its return into the storage vessel.

12. The method according to claim 8 , wherein it further includes the following steps:
determining at least information relating to the electrolyte flowing in the first channel and/or in the second channel; and
modifying at least one characteristic of the anodizing treatment, this modification being performed as a function of the information determined about the electrolyte.

Assignees

• Safran Helicopter Engines
• Safran Landing Systems

Inventors

• Gurt Santanach Julien
• Viola Alain

Classifications

• C25D17/12

  Shape or form (C25D17/14 takes precedence) · CPC title

• C25D21/18

  of electrolytes (C25D21/22 takes precedence) · CPC title

• C25D11/026 Primary

  Anodisation with spark discharge · CPC title

• C25D21/06

  Filtering {particles other than ions (filtering ions C25D21/22)} · CPC title

• C25D17/02

  Tanks; Installations therefor · CPC title