US5268238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly corrosion and/or oxidation-resistant protective coating containing rhenium applied to gas turbine component surface and method thereof
Assignee: Siemens AG
•
Filing: 1992-12-02
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Granted: 1993-12-07
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Expires: 2012-12-02
Abstract
Abstract A method of protecting and a protective coating for metal components formed of nickel or cobalt-based superalloys are disclosed. The protective coating essentially consists of the following constituents (in percent by weight): 1 to 20% rhenium, 15 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt. The protective coating is primarily suited for use with metal components in gas turbines and aircraft engines.
Inventors
- 👤 Norbert Czech
- 👤 Friedhelm Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:07
CPC Classifications
C; C23; C23C; C23C30/00; C22; C22C; C22C19/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12937
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
158 words
In combination, a protective coating for metal components essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 15 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 15% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt; and a gas-turbine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the gas-turbine component.
Claim 2
Dependent Claim
158 words
In combination, a protective coating for metal components essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 15 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 15% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt; and a gas-turbine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the gas-turbine component.
Claim 3
Dependent Claim
121 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 25 to 35% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 3% silicon, 0.3 to 2% yttrium, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10%manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily cobalt; and a gas-turbine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the gas-turbine component.
Claim 4
Dependent Claim
121 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 25 to 35% nickel, 28 to 32% chromium, 7 to 9% aluminum, 1 to 3% silicon, 0.3 to 2% yttrium, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10%manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily cobalt; and a gas-turbine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the gas-turbine component.
Claim 5
Dependent Claim
137 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel; and a metal aircraft-engine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the aircraft-engine component.
Claim 6
Dependent Claim
137 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel; and a metal aircraft-engine component formed of nickel or cobalt-based superalloy, the protective coating being applied to a surface of the aircraft-engine component.
Claim 7
Dependent Claim
131 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 105 manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel; and a metal turbine blade, the protective coating being applied to a surface of the turbine blade.
Claim 8
Dependent Claim
131 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 105 manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel; and a metal turbine blade, the protective coating being applied to a surface of the turbine blade.
Claim 9
Dependent Claim
141 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 25 to 50% chromium, 0 to 3% aluminum, 0.3 to 2% yttrium, 0.3 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5 % titanium, 0 to 4% niobium and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum Of 15%, and a remainder primarily being at least one of the elements of the group consisting of iron, nickel and cobalt; and a component formed of nickel or cobalt-based superalloy and subject to corrosion at approximately 600° to 850° C., the protective coating being applied to a surface of the component.
Claim 10
Dependent Claim
141 words
In combination, a protective coating for metal components, essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 25 to 50% chromium, 0 to 3% aluminum, 0.3 to 2% yttrium, 0.3 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5 % titanium, 0 to 4% niobium and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum Of 15%, and a remainder primarily being at least one of the elements of the group consisting of iron, nickel and cobalt; and a component formed of nickel or cobalt-based superalloy and subject to corrosion at approximately 600° to 850° C., the protective coating being applied to a surface of the component.
Claim 11
Independent Claim
129 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of coating the metal components with a protective coating essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 12
Independent Claim
129 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of coating the metal components with a protective coating essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 15 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 13
Independent Claim
154 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of applying a protective coating on a metal component, the protective coating essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 15 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 14
Independent Claim
154 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of applying a protective coating on a metal component, the protective coating essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 15 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 15
Independent Claim
129 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of coating the metal components with a protective coating essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 22 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 16
Independent Claim
129 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of coating the metal components with a protective coating essentially consisting of the following constituents (in percent by weight): 1 to 15% rhenium, 22 to 26% chromium, 9 to 15% aluminum, 0.3 to 2% of at least one reactive element selected from the group consisting of rare earth elements, 0 to 30% cobalt, 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0 to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder being primarily nickel.
Claim 17
Independent Claim
154 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of applying a protective coating on a metal component, the protective coating essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 22 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 18
Independent Claim
154 words
A method of protecting metal components against corrosion and/or oxidation, which comprises the step of applying a protective coating on a metal component, the protective coating essentially consisting of the following constituents (in percent by weight): 1 to 20% rhenium, 22 to 50% chromium, 0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%, 0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and 0 to 3% silicon, impurities, as well as the following elective components: 0 to 5% hafnium, 0 to 12% tungsten, 0 to 10% manganese, 0 to 15% tantalum, 0to 5% titanium, 0 to 4% niobium, and 0 to 2% zirconium, the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.
Claim 19
Dependent Claim
14 words
The combination according to claim 1, wherein the rhenium share is 1 to 15%.
Claim 20
Dependent Claim
14 words
The combination according to claim 10, wherein the rhenium share is 4 to 10%.
Claim 21
Dependent Claim
13 words
The combination according to claim 11, wherein the rhenium share is approximately 7%.
Claim 22
Dependent Claim
15 words
The combination according to claim 1, wherein the aluminum share is from 7 to 9%.
Claim 23
Dependent Claim
14 words
The combination according to claim 1, wherein the silicon share is 1 to 2%.
Claim 24
Dependent Claim
14 words
The combination according to claim 1, wherein the nickel share is 25 to 35%.
Claim 25
Dependent Claim
14 words
The combination according to claim 1, wherein the cobalt share is 25 to 35%.
Claim 26
Dependent Claim
14 words
The combination according to claim 2, wherein the rhenium share is 4 to 10%.
Claim 27
Dependent Claim
13 words
The combination according to claim 17, wherein the rhenium share is approximately 7%.
Claim 28
Dependent Claim
14 words
The combination according to claim 2, wherein the silicon share is 1 to 2%.
Claim 29
Dependent Claim
14 words
The combination according to claim 33, wherein the rhenium share is 4 to 10%.
Claim 30
Dependent Claim
13 words
The combination according to claim 20, wherein the rhenium share is approximately 7%.
Claim 31
Dependent Claim
14 words
The combination according to claim 3, wherein the silicon share is 1 to 2%.
Claim 32
Dependent Claim
14 words
The combination according to claim 3, wherein the nickel share is 25 to 35%.
Claim 33
Dependent Claim
14 words
The combination according to claim 4, wherein the rhenium share is 4 to 10%.
Claim 34
Dependent Claim
13 words
The combination according to claim 24, wherein the rhenium share is approximately 7%.
Claim 35
Dependent Claim
15 words
The protective coating according to claim 4, wherein the silicon share is 1 to 2%.
Claim 36
Dependent Claim
14 words
The combination according to claim 4, wherein the nickel share is 25 to 35%.
Claim 37
Dependent Claim
14 words
The combination according to claim 5, wherein the rhenium share is 4 to 10%.
Claim 38
Dependent Claim
13 words
The combination according to claim 28, wherein the rhenium share is approximately 7%.
Claim 39
Dependent Claim
14 words
The combination according to claim 5, wherein the silicon share is 1 to 2%.
Claim 40
Dependent Claim
14 words
The combination according to claim 5, wherein the chromium share is 28 to 32%.
Claim 41
Dependent Claim
14 words
The combination according to claim 5, wherein the nickel share is 25 to 35%.
Claim 42
Dependent Claim
14 words
The combination according to claim 5, wherein the cobalt share is 25 to 35%.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |