GB741041A - Improvements in methods of forming protective metallic layers, in particular of chromium, on metal pieces - Google Patents

Improvements in methods of forming protective metallic layers, in particular of chromium, on metal pieces

Info

Publication number
GB741041A
GB741041A GB15128/51A GB1512851A GB741041A GB 741041 A GB741041 A GB 741041A GB 15128/51 A GB15128/51 A GB 15128/51A GB 1512851 A GB1512851 A GB 1512851A GB 741041 A GB741041 A GB 741041A
Authority
GB
United Kingdom
Prior art keywords
chromium
per cent
methods
metal pieces
metallic layers
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
GB15128/51A
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.)
Office National dEtudes et de Recherches Aerospatiales ONERA
Original Assignee
Office National dEtudes et de Recherches Aerospatiales ONERA
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 Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA
Publication of GB741041A publication Critical patent/GB741041A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/02—Pretreatment of the material to be coated
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only

Landscapes

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

Abstract

Metal articles are subjected to two successive treatments for the formation of protective metal layers thereon, the first of such treatments differing from the second and comprising a thermochemical treatment by at least one fluoride of an addition metal to form a diffusion alloy. Ferrous articles may be chromized, using chromium fluoride, for 6 hours at 1100 DEG C. and then sprayed with aluminium or calorized for 10 hours at 900-950 DEG C. in a mixture of 30 per cent aluminium, 65 per cent alumina and 5 per cent ammonium chloride. Alternatively, the second coating may be of silicon, molybdenum or tungsten and the first coating may be of several metals together. In a further alternative, chromizing is followed by electro-plating with chromium. The thermochemical treatment may be carried out as in Specification 693,292. Specifications 640,616 and 662,333 also are referred to.
GB15128/51A 1950-06-27 1951-06-26 Improvements in methods of forming protective metallic layers, in particular of chromium, on metal pieces Expired GB741041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1021039T 1950-06-27

Publications (1)

Publication Number Publication Date
GB741041A true GB741041A (en) 1955-11-23

Family

ID=9576708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15128/51A Expired GB741041A (en) 1950-06-27 1951-06-26 Improvements in methods of forming protective metallic layers, in particular of chromium, on metal pieces

Country Status (3)

Country Link
US (1) US2819208A (en)
FR (1) FR1021039A (en)
GB (1) GB741041A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301814A (en) * 1962-07-19 1967-01-31 Shell Oil Co Process for curing polyepoxides with substituted phthalocyanines and resulting products
DE1250232B (en) * 1963-09-03 1967-09-14 Chromium Corporation of America, Waterbury, Conn (V St A) Process for the galvanic deposition of smooth metal coatings on metal surfaces provided with indentations
GB9618460D0 (en) * 1996-09-04 1996-10-16 Diffusion Alloys Ltd Coinage material and process for production thereof
GB2337765A (en) * 1998-05-27 1999-12-01 Solicitor For The Affairs Of H Aluminium diffusion of copper coatings

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB321914A (en) * 1928-07-09 1929-11-11 Philips Nv An improved process for coating metallic or non-metallic bodies with chromium
US2555372A (en) * 1944-10-02 1951-06-05 Westinghouse Electric Corp Method of coating refractory readily oxidizable metals
GB722797A (en) * 1950-11-21 1955-02-02 Diffusion Alloys Ltd Improvements in or relating to coating metals

Also Published As

Publication number Publication date
US2819208A (en) 1958-01-07
FR1021039A (en) 1953-02-13

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