Patent US5064510A successfully refreshed from Google Patents.
US5064510A
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Method for producing a galvanically deposited protection layer against hot gas corrosion
Assignee: MTU Aero Engines AG
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Filing: 1990-10-26
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Granted: 1991-11-12
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Expires: 2010-10-26
Abstract
Abstract A method for producing a galvanically deposited protection layer against hot gas corrosion of a structural component, involves immersing the structural component in an electrolytic bath of a cobalt and/or nickel matrix material. Alloying chromium and/or aluminum particles are suspended in the electrolytic bath. Gas bubbles are mixed into the electrolytic bath, and the immersed structural component is rotated in the bath while the galvanic deposition or coating takes place. The bath is stationary and rotation of the structural component takes place about a substantially horizontal axis.
Inventors
- 👤 Martin Thoma
- 👤 Monika Bindl
- 👤 Josef Linska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:36
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C25D5/50; C25D15/00; C25D15/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A method for galvanically depositing a protective coating on a structural component intended for exposure to hot gas, comprising the following steps: (a) preparing an electrolyte in which a matrix material of cobalt and/or nickel is contained, (b) providing an alloying powder containing at least one component selected from the group consisting of aluminum, chromium, and yttrium, said alloying powder having powder particles of a substantially spherical configuration with a passivated surface, (c) suspending said spherical powder particles in said electrolyte, (d) introducing gas bubbles into a stationary electrolytic bath holding said electrolyte, (e) immersing said structural component in said stationary electrolytic bath with said gas bubbles therein and rotating said structural component about a substantially horizontal axis while said structural component is immersed in said electrolytic bath, until said structural component has a coating of a desired thickness, and (f) removing the coated structural component from said electrolytic bath and subjecting the coated structural component to a heat treatment until an alloyed coating is formed.
Claim 2
Independent Claim
166 words
A method for galvanically depositing a protective coating on a structural component intended for exposure to hot gas, comprising the following steps: (a) preparing an electrolyte in which a matrix material of cobalt and/or nickel is contained, (b) providing an alloying powder containing at least one component selected from the group consisting of aluminum, chromium, and yttrium, said alloying powder having powder particles of a substantially spherical configuration with a passivated surface, (c) suspending said spherical powder particles in said electrolyte, (d) introducing gas bubbles into a stationary electrolytic bath holding said electrolyte, (e) immersing said structural component in said stationary electrolytic bath with said gas bubbles therein and rotating said structural component about a substantially horizontal axis while said structural component is immersed in said electrolytic bath, until said structural component has a coating of a desired thickness, and (f) removing the coated structural component from said electrolytic bath and subjecting the coated structural component to a heat treatment until an alloyed coating is formed.
Claim 3
Dependent Claim
36 words
The method of claim 1, wherein said rotating of the immersed structural component in said electrolytic bath is performed at an r.p.m. within the range of 2 to 10 revolutions per minute about a horizontal axis.
Claim 4
Dependent Claim
34 words
The method of claim 1, wherein cobalt and nickel of said matrix material are present in said electrolyte sufficient for depositing a stoichiometric mol ratio of 1:1 of nickel to cobalt in said coating.
Claim 5
Dependent Claim
24 words
The method of claim 1, wherein a current density in said electrolytic bath is within the range of 500 to 800 Ampere/m 2 .
References Cited (Backward Citations)
US4895625A
Cited
GB2221921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |