CA2663911A1 - Method for removing an aluminide coating from a substrate - Google Patents

Method for removing an aluminide coating from a substrate Download PDF

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Publication number
CA2663911A1
CA2663911A1 CA002663911A CA2663911A CA2663911A1 CA 2663911 A1 CA2663911 A1 CA 2663911A1 CA 002663911 A CA002663911 A CA 002663911A CA 2663911 A CA2663911 A CA 2663911A CA 2663911 A1 CA2663911 A1 CA 2663911A1
Authority
CA
Canada
Prior art keywords
acid
substrate
coating
substituted
sulfonic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002663911A
Other languages
French (fr)
Other versions
CA2663911C (en
Inventor
Leo Spitz Macdonald
D. Sangeeta
Mark Alan Rosenzweig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Company
Leo Spitz Macdonald
D. Sangeeta
Mark Alan Rosenzweig
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/067,780 external-priority patent/US5976265A/en
Priority claimed from US09/303,755 external-priority patent/US6494960B1/en
Application filed by General Electric Company, Leo Spitz Macdonald, D. Sangeeta, Mark Alan Rosenzweig filed Critical General Electric Company
Publication of CA2663911A1 publication Critical patent/CA2663911A1/en
Application granted granted Critical
Publication of CA2663911C publication Critical patent/CA2663911C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions
    • C23F1/20—Acidic compositions for etching aluminium or alloys thereof
    • 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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

A method for removing an aluminide coating from a substrate includes the steps of contacting the surface of the substrate with at least one stripping composition to degrade the coating. The stripping composition includes an aliphatic or aromatic sulfonic acid, and at least one additive. The coating is then removed.

Claims (15)

1. A method for removing an aluminide coating from a surface of a substrate, comprising the following steps:
contacting the surface of the substrate with at least one stripping composition, said stripping composition comprising an aliphatic or aromatic sulfonic acid, and at least one organic additive, said at least one organic additive selected from the group consisting of a. a complexing agent selected from a group consisting of substituted aromatics and substituted carboxylic acids, and b. a solvent selected from a group consisting of, substituted alkylethers, substituted ketones, and glycols; and removing the coating.
2. The method of claim 1, wherein the sulfonic acid is selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, benzene sulfonic acid, toluene sulfonic acid, and naphthalene sulfonic acid.
3. The method of claim 1, wherein the sulfonic acid is methanesulfonic acid.
4. The method of claim 1, wherein the complexing agent is present in the stripping composition in an amount of about 1-100 wt %.
5. The method of claim 1, wherein the complexing agent is a substituted aromatic containing a nitro, hydroxy, carboxyl, or sulfate component.
6. The method of claim 5, wherein the complexing agent is dinitrobenzenesulfonic acid.
7. The method of claim 1, wherein the complexing agent is a substituted carboxylic acid, said substituted carboxylic acid being selected from a group consisting of tartaric acid, citric acid, and oxalic acid.
8. The method of claim 1, wherein the solvent is present in the stripping composition in an amount of about 1-80 wt/%.
9. The method of claim 1, wherein the step of contacting is carried out by immersing the substrate in a bath of the stripping composition.
10. The method of claim 9, wherein the bath is maintained at a temperature below about 170° F. while the substrate is immersed therein.
11. The method of claim 1, wherein removal of the coating is carried out by abrading.
12. The method of claim 1, wherein the coating is removed by agitating the substrate in an aqueous bath.
13. The method of claim 1, wherein the aluminide-coating comprises platinum aluminide region and a non-platinum aluminide region, said non-platinum aluminide region being free of platinum.
14. The method of claim 13, wherein the non-platinum aluminide region comprises a nickel aluminide.
15. The method of claim 1, wherein the substrate comprises a nickel-based superalloy or a cobalt-based superalloy.
CA2663911A 1998-04-27 2000-05-02 Method for removing an aluminide coating from a substrate Expired - Fee Related CA2663911C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/067,780 US5976265A (en) 1998-04-27 1998-04-27 Method for removing an aluminide-containing material from a metal substrate
US09/303,755 1999-05-03
US09/303,755 US6494960B1 (en) 1998-04-27 1999-05-03 Method for removing an aluminide coating from a substrate
CA2307398A CA2307398C (en) 1999-05-03 2000-05-02 Method for removing an aluminide coating from a substrate

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA2307398A Division CA2307398C (en) 1998-04-27 2000-05-02 Method for removing an aluminide coating from a substrate

Publications (2)

Publication Number Publication Date
CA2663911A1 true CA2663911A1 (en) 2000-11-03
CA2663911C CA2663911C (en) 2011-11-15

Family

ID=46203846

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2663911A Expired - Fee Related CA2663911C (en) 1998-04-27 2000-05-02 Method for removing an aluminide coating from a substrate

Country Status (1)

Country Link
CA (1) CA2663911C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112730487A (en) * 2020-12-17 2021-04-30 河钢股份有限公司 Preparation method and measurement method of aluminum-silicon coated steel residual stress measurement sample

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112730487A (en) * 2020-12-17 2021-04-30 河钢股份有限公司 Preparation method and measurement method of aluminum-silicon coated steel residual stress measurement sample

Also Published As

Publication number Publication date
CA2663911C (en) 2011-11-15

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Effective date: 20180502