GB572703A - Improvements in or relating to metallic coatings on iron and steel - Google Patents
Improvements in or relating to metallic coatings on iron and steelInfo
- Publication number
- GB572703A GB572703A GB666941A GB666941A GB572703A GB 572703 A GB572703 A GB 572703A GB 666941 A GB666941 A GB 666941A GB 666941 A GB666941 A GB 666941A GB 572703 A GB572703 A GB 572703A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen
- chromium
- ceramic
- steel
- furnace
- 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
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/34—Embedding in a powder mixture, i.e. pack cementation
- C23C10/36—Embedding in a powder mixture, i.e. pack cementation only one element being diffused
- C23C10/38—Chromising
- C23C10/40—Chromising of ferrous surfaces
- C23C10/42—Chromising of ferrous surfaces in the presence of volatile transport additives, e.g. halogenated substances
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
Abstract
572,703. Coating iron and steel. SAMUEL, R. L. May 24, 1941, No. 6669. [Class 82 (ii)] Chromium coatings are produced on iron and steel articles by heating the latter to 550- 1250‹ C., preferably between 700‹ C. and 1050‹ C., in an atmosphere of hydrogen or other inert gas with or in contact with an agent prepared by impregnating a porous heat-resisting substance with a solution of a highly-soluble sodium, potassium, or ammonium salt of chromium or of chromic acid and then reducing it by heating with a hydrogen halide at an elevated temperature. The porous heat-resisting substance may consist of fragments of porcelain, ceramic, pottery, earthenware or slag. In an example, dried fragments of ceramic were poured into a hot saturated solution of potassium bichromate. After the solution had cooled, the impregnated ceramic was removed therefrom, dried and introduced into the heating chamber of a furnace and a stream of hydrogen at 850-950‹ C. passed through. Then a stream of hydrogen chloride at the same temperature was passed through the material resulting in the formation of a homogeneous layer containing complex chlorides of potassium and chromium. The. ceramic thus prepared was introduced into a furnace, together with a small proportion of carbon-free ferro-chromium and a number of small steel bolts. The furnace was then heated to 900‹ C. and hydrogen passed through at temperature for 3 hours. Instead of hydrogen, other inert gases such as acetylene or coal gas may be used. Specification 516,260 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB666941A GB572703A (en) | 1941-05-24 | 1941-05-24 | Improvements in or relating to metallic coatings on iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB666941A GB572703A (en) | 1941-05-24 | 1941-05-24 | Improvements in or relating to metallic coatings on iron and steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB572703A true GB572703A (en) | 1945-10-19 |
Family
ID=9818648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB666941A Expired GB572703A (en) | 1941-05-24 | 1941-05-24 | Improvements in or relating to metallic coatings on iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB572703A (en) |
Cited By (3)
| 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 |
| US2875112A (en) * | 1955-06-13 | 1959-02-24 | Deutsche Edelstahlwerke Ag | Process for improving the physical properties of chromized articles |
| DE976039C (en) * | 1946-03-07 | 1963-01-24 | Interchrome S A | Process and device for coating iron or nickel with chromium |
-
1941
- 1941-05-24 GB GB666941A patent/GB572703A/en not_active Expired
Cited By (3)
| 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 |
| US2771669A (en) * | 1952-07-07 | 1956-11-27 | Gen Motors Corp | Method of coating interior of tubing with zinc |
| US2875112A (en) * | 1955-06-13 | 1959-02-24 | Deutsche Edelstahlwerke Ag | Process for improving the physical properties of chromized articles |
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