GB363954A - Improvements in and relating to methods of coating metals - Google Patents
Improvements in and relating to methods of coating metalsInfo
- 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
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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/08—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases only one element being diffused
- C23C10/10—Chromising
- C23C10/12—Chromising 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.
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)
| 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 |
-
1931
- 1931-05-26 GB GB15398/31A patent/GB363954A/en not_active Expired
Cited By (8)
| 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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