IT1258963B - Soluzione di attacco e procedimento per l'allontanamento di strati metallici di protezione contro una corrosione provocata da gas caldi e rivestimenti di reazione di gas caldi su palette di turbine - Google Patents
Soluzione di attacco e procedimento per l'allontanamento di strati metallici di protezione contro una corrosione provocata da gas caldi e rivestimenti di reazione di gas caldi su palette di turbineInfo
- Publication number
- IT1258963B IT1258963B ITMI921421A ITMI921421A IT1258963B IT 1258963 B IT1258963 B IT 1258963B IT MI921421 A ITMI921421 A IT MI921421A IT MI921421 A ITMI921421 A IT MI921421A IT 1258963 B IT1258963 B IT 1258963B
- Authority
- IT
- Italy
- Prior art keywords
- hot gas
- turbine blades
- protection against
- metal layers
- solution
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/002—Cleaning of turbomachines
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
L'invenzione riguarda una soluzione di attacco e un procedimento per l'allontanamento di strati metallici per la protezione contro la corrosione provocata da gas caldi e di rivestimenti di reazione di gas caldi su palette di turbine con una soluzione salina e un inibitore, la soluzione salina essendo costituita per il 5-45% in peso da un solfato acido e presentando 0,5-10% in peso di inibitore e la somma di solfato acido e di inibitore venendo dimensionata in modo che sia contenuto almeno 50% in peso di acqua, riferito a tutta la soluzione di attacco. Con questa soluzione di attacco vengono rimossi preferibilmente strati di McrA1Y da palette per turbine su leghe a base di titanio, di cobalto oppure di nichel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4120305A DE4120305C1 (it) | 1991-06-20 | 1991-06-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI921421A0 ITMI921421A0 (it) | 1992-06-10 |
ITMI921421A1 ITMI921421A1 (it) | 1993-12-10 |
IT1258963B true IT1258963B (it) | 1996-03-11 |
Family
ID=6434325
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI921421A IT1258963B (it) | 1991-06-20 | 1992-06-10 | Soluzione di attacco e procedimento per l'allontanamento di strati metallici di protezione contro una corrosione provocata da gas caldi e rivestimenti di reazione di gas caldi su palette di turbine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5248381A (it) |
DE (1) | DE4120305C1 (it) |
GB (1) | GB2257395B (it) |
IT (1) | IT1258963B (it) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5695659A (en) * | 1995-11-27 | 1997-12-09 | United Technologies Corporation | Process for removing a protective coating from a surface of an airfoil |
GB9814075D0 (en) * | 1998-06-29 | 1998-08-26 | Ge Aircraft Engine Services Li | Method of stripping a coating from an aircraft engine part |
US6355116B1 (en) | 2000-03-24 | 2002-03-12 | General Electric Company | Method for renewing diffusion coatings on superalloy substrates |
US6454870B1 (en) | 2001-11-26 | 2002-09-24 | General Electric Co. | Chemical removal of a chromium oxide coating from an article |
US6699101B2 (en) * | 2001-11-29 | 2004-03-02 | General Electric Company | Method for removing a damaged substrate region beneath a coating |
US6878215B1 (en) | 2004-05-27 | 2005-04-12 | General Electric Company | Chemical removal of a metal oxide coating from a superalloy article |
US20080264897A1 (en) * | 2007-04-30 | 2008-10-30 | Canan Uslu Hardwicke | Turbine component pattern forming method |
US10189100B2 (en) | 2008-07-29 | 2019-01-29 | Pratt & Whitney Canada Corp. | Method for wire electro-discharge machining a part |
US8925201B2 (en) * | 2009-06-29 | 2015-01-06 | Pratt & Whitney Canada Corp. | Method and apparatus for providing rotor discs |
US20110164981A1 (en) * | 2010-01-04 | 2011-07-07 | General Electric Company | Patterned turbomachine component and method of forming a pattern on a turbomachine component |
US9926517B2 (en) | 2013-12-09 | 2018-03-27 | General Electric Company | Cleaning solution and methods of cleaning a turbine engine |
US9957066B2 (en) | 2015-02-13 | 2018-05-01 | General Electric Company | Detergent delivery methods and systems for turbine engines |
BR102016021259B1 (pt) | 2015-10-05 | 2022-06-14 | General Electric Company | Método e soluções de limpeza de um motor de turbina e composição de reagente |
US10316414B2 (en) * | 2016-06-08 | 2019-06-11 | United Technologies Corporation | Removing material with nitric acid and hydrogen peroxide solution |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR677069A (it) * | 1929-10-04 | |||
US1780594A (en) * | 1929-10-09 | 1930-11-04 | Grasselli Chemical Co | Acid treatment of metal articles |
US2977318A (en) * | 1956-06-20 | 1961-03-28 | Hagan Chemicals & Controls Inc | Substituted amide inhibited acid compositions |
US3053719A (en) * | 1958-12-08 | 1962-09-11 | Purex Corp Ltd | Composition and process for etching magnesium |
US3277008A (en) * | 1962-04-20 | 1966-10-04 | Pfaudler Permutit Inc | Surface cleaning method and composition |
DE1296111B (de) * | 1965-10-30 | 1969-05-29 | Nikex Nehezipari Kulkere | Mittel zum Entfernen von Bierstein |
DE1521806A1 (de) * | 1966-11-25 | 1970-08-20 | Horst Arendt | Verfahren zur Entmetallisierung |
US3510430A (en) * | 1967-05-22 | 1970-05-05 | Diversey Corp | Compositions for treating aluminum surfaces |
GB1157038A (en) * | 1967-09-19 | 1969-07-02 | Lancy Lab | Pickling Solutions for Removing Copper Oxides from Copper Containing Workpieces |
GB1365227A (en) * | 1972-05-30 | 1974-08-29 | Halliburton Co | Composition and method for removing copper containing iron oxide scales from ferrous metals |
JPS5313172B2 (it) * | 1973-06-14 | 1978-05-08 | ||
US4302246A (en) * | 1980-01-03 | 1981-11-24 | Enthone, Incorporated | Solution and method for selectively stripping alloys containing nickel with gold, phosphorous or chromium from stainless steel and related nickel base alloys |
DE3048083C2 (de) * | 1980-12-19 | 1983-09-29 | Ludwig 8900 Augsburg Fahrmbacher-Lutz | Verfahren zur chemischen Entfernung von Oxidschichten von Gegenständen aus Titan oder Titanlegierungen |
US4339282A (en) * | 1981-06-03 | 1982-07-13 | United Technologies Corporation | Method and composition for removing aluminide coatings from nickel superalloys |
US4425185A (en) * | 1982-03-18 | 1984-01-10 | United Technologies Corporation | Method and composition for removing nickel aluminide coatings from nickel superalloys |
US4563239A (en) * | 1984-10-16 | 1986-01-07 | United Technologies Corporation | Chemical milling using an inert particulate and moving vessel |
CH674851A5 (it) * | 1987-12-01 | 1990-07-31 | Bbc Brown Boveri & Cie |
-
1991
- 1991-06-20 DE DE4120305A patent/DE4120305C1/de not_active Expired - Lifetime
-
1992
- 1992-06-10 IT ITMI921421A patent/IT1258963B/it active IP Right Grant
- 1992-06-16 US US07/899,691 patent/US5248381A/en not_active Expired - Lifetime
- 1992-06-19 GB GB9213053A patent/GB2257395B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB9213053D0 (en) | 1992-08-05 |
ITMI921421A0 (it) | 1992-06-10 |
ITMI921421A1 (it) | 1993-12-10 |
GB2257395B (en) | 1995-11-01 |
GB2257395A (en) | 1993-01-13 |
US5248381A (en) | 1993-09-28 |
DE4120305C1 (it) | 1992-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970530 |