GB879334A - Corrosion-resistant treatment of metal articles - Google Patents

Corrosion-resistant treatment of metal articles

Info

Publication number
GB879334A
GB879334A GB3521457A GB3521457A GB879334A GB 879334 A GB879334 A GB 879334A GB 3521457 A GB3521457 A GB 3521457A GB 3521457 A GB3521457 A GB 3521457A GB 879334 A GB879334 A GB 879334A
Authority
GB
United Kingdom
Prior art keywords
coating
chromium
alloy
coated
base
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.)
Expired
Application number
GB3521457A
Inventor
Norman Stephenson
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.)
Power Jets Research and Development Ltd
Original Assignee
Power Jets Research and Development Ltd
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
Application filed by Power Jets Research and Development Ltd filed Critical Power Jets Research and Development Ltd
Priority to GB3521457A priority Critical patent/GB879334A/en
Priority to CH6608258A priority patent/CH386803A/en
Publication of GB879334A publication Critical patent/GB879334A/en
Expired 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

A metal base is coated with a corrosion resistant layer containing a Ni-Si eutectic alloy containing 12% Si by weight by a process of sintering, flame spraying or impregnation. The process is applied to a Ni base alloy containing 18 - 21% Cr, 5% Fe, 2% co, 1.8 - 2% Ti and 0.1% C which is degassed at 900 DEG C. in vacuo, cleaned and then coated either with a mixture of Ni and Si powders or the prealloyed powder as a suspension in xylene and finally sintered in vacuo at 1150 DEG C. The coating may also be applied by flame spraying and sintering in an inert atmosphere or a nickel coating can be applied which is then impregnated with silicon. If the base metal contains chromium the coating should be free of chromium and if necessary the surface of the base metal may be depleted of chromium prior to the coating operation by heating it in air and removing the oxide or a layer of nickel may be applied before the coating of the Ni - Si eutectic alloy. When coating chromium free bases the Ni - Si alloy may also contain chromium. The coated article is isothermally heat treated at 900 - 1000 DEG C. and then aged at 700 DEG C. According to the Provisional Specification the Ni - Si coating alloy may also contain Be and/or Mg in addition to Cr.
GB3521457A 1957-11-12 1957-11-12 Corrosion-resistant treatment of metal articles Expired GB879334A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3521457A GB879334A (en) 1957-11-12 1957-11-12 Corrosion-resistant treatment of metal articles
CH6608258A CH386803A (en) 1957-11-12 1958-11-12 Process for increasing the corrosion resistance of metal objects by applying a metallic coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3521457A GB879334A (en) 1957-11-12 1957-11-12 Corrosion-resistant treatment of metal articles

Publications (1)

Publication Number Publication Date
GB879334A true GB879334A (en) 1961-10-11

Family

ID=10375161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3521457A Expired GB879334A (en) 1957-11-12 1957-11-12 Corrosion-resistant treatment of metal articles

Country Status (2)

Country Link
CH (1) CH386803A (en)
GB (1) GB879334A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49103808A (en) * 1973-02-06 1974-10-01
GB2159835A (en) * 1984-06-05 1985-12-11 Cabot Corp Silicon-rich alloy coatings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2745812C2 (en) * 1977-10-12 1984-08-30 Brown, Boveri & Cie Ag, 6800 Mannheim Process for applying a protective layer containing silicon

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49103808A (en) * 1973-02-06 1974-10-01
JPS5637282B2 (en) * 1973-02-06 1981-08-29
GB2159835A (en) * 1984-06-05 1985-12-11 Cabot Corp Silicon-rich alloy coatings
GB2159835B (en) * 1984-06-05 1989-06-01 Cabot Corp Silicon-rich alloy coatings

Also Published As

Publication number Publication date
CH386803A (en) 1965-01-15

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