GB363954A - Improvements in and relating to methods of coating metals - Google Patents

Improvements in and relating to methods of coating metals

Info

Publication number
GB363954A
GB363954A GB15398/31A GB1539831A GB363954A GB 363954 A GB363954 A GB 363954A GB 15398/31 A GB15398/31 A GB 15398/31A GB 1539831 A GB1539831 A GB 1539831A GB 363954 A GB363954 A GB 363954A
Authority
GB
United Kingdom
Prior art keywords
chromium
small amount
carrier
inert
inert material
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
GB15398/31A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB363954A publication Critical patent/GB363954A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C10/00Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/06Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
    • C23C10/08Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
    • C23C10/10Chromising
    • C23C10/12Chromising of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A protective coating of chromium is formed on a foundation metal by heating the metal in the presence of, but out of contact with, metallic chromium, the metals being contained in a porous receptacle which is packed in an inert medium containing a small amount of a carrier, i.e. a substance which will dissociate on heating with the formation of an acid capable of uniting with the chromium. The carrier, which may be ammonium chloride, preferably constitutes about 2 per cent by weight of the inert material. For example, an iron article may be placed together with but out of contact with a small amount of metallic chromium in an alundum tube which is plugged at its open ends with asbestos paper and is placed in an iron container, the space between being packed with inert material, e.g. aluminium oxide, containing a small amount of ammonium chloride. Some chromium, e.g. 50 per cent by weight, may be mixed with the inert material. The iron container is then placed in a furnace and heated to about 1000 DEG C. in air or inert or reducing gas for about 2 hours. It is stated that the hydrochloric acid gas obtained from the dissociation of the carrier probably combines with the chromium forming a chloride which is then decomposed by the heated foundation metal, chromium being deposited.
GB15398/31A 1930-05-29 1931-05-26 Improvements in and relating to methods of coating metals Expired GB363954A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US363954XA 1930-05-29 1930-05-29

Publications (1)

Publication Number Publication Date
GB363954A true GB363954A (en) 1931-12-31

Family

ID=21888383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15398/31A Expired GB363954A (en) 1930-05-29 1931-05-26 Improvements in and relating to methods of coating metals

Country Status (1)

Country Link
GB (1) GB363954A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771669A (en) * 1952-07-07 1956-11-27 Gen Motors Corp Method of coating interior of tubing with zinc
US2910382A (en) * 1955-06-30 1959-10-27 Vulliez Paul Method of forming surface alloys on metallic articles
DE974190C (en) * 1949-08-05 1960-10-13 Onera (Off Nat Aerospatiale) Device for the production of metallic diffusion coatings
DE976039C (en) * 1946-03-07 1963-01-24 Interchrome S A Process and device for coating iron or nickel with chromium
US3079276A (en) * 1960-10-14 1963-02-26 Union Carbide Corp Vapor diffusion coating process
US3253942A (en) * 1961-12-15 1966-05-31 Howe Sound Co Chromium diffusion process and article
EP1176225A1 (en) * 2000-07-27 2002-01-30 MTU Aero Engines GmbH Process and apparatus for chromizing the inside surface of an article

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976039C (en) * 1946-03-07 1963-01-24 Interchrome S A Process and device for coating iron or nickel with chromium
DE974190C (en) * 1949-08-05 1960-10-13 Onera (Off Nat Aerospatiale) Device for the production of metallic diffusion coatings
US2771669A (en) * 1952-07-07 1956-11-27 Gen Motors Corp Method of coating interior of tubing with zinc
US2910382A (en) * 1955-06-30 1959-10-27 Vulliez Paul Method of forming surface alloys on metallic articles
US3079276A (en) * 1960-10-14 1963-02-26 Union Carbide Corp Vapor diffusion coating process
US3253942A (en) * 1961-12-15 1966-05-31 Howe Sound Co Chromium diffusion process and article
EP1176225A1 (en) * 2000-07-27 2002-01-30 MTU Aero Engines GmbH Process and apparatus for chromizing the inside surface of an article
US6913788B2 (en) 2000-07-27 2005-07-05 Mtu Aero Engines Gmbh Process and apparatus for chroming an inner surface of a component

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