GB709937A - Preparation of articles having at least a coherent and homogeneous surface layer of magnetite - Google Patents
Preparation of articles having at least a coherent and homogeneous surface layer of magnetiteInfo
- Publication number
- GB709937A GB709937A GB14663/51A GB1466351A GB709937A GB 709937 A GB709937 A GB 709937A GB 14663/51 A GB14663/51 A GB 14663/51A GB 1466351 A GB1466351 A GB 1466351A GB 709937 A GB709937 A GB 709937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetite
- depressions
- articles
- smooth
- coherent
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
Articles of magnetite of a thickness of at least 4mms. are formed from smooth-surfaced articles of non-porous ferrous metal by bricking up the surface to form depressions of small width and depth and subsequently heating in a mildly oxidizing gaseous atmosphere at high temperature and continuing the heating until the iron is completely converted into a coherent body of magnetite which has a smooth surface free from depressions. The surface may be broken up by grooving, scratching, sandblasting, etching or boring holes therein. Oxidation may be effected in steam at 1050 DEG C. Specification 16,902/11, [Class 1 (iii)], is referred to.ALSO:Smooth surfaced articles of non-porous ferrous metal are treated by breaking up the surface to form depressions of small width and depth and subsequently heating in a mildly oxidizing gaseous atmosphere at high temperature and continuing the heating until a coherent layer of magnetite is formed, having a thickness of at least 2 mms. and which fills the depressions and forms a smooth surface free from depressions. The surface may be broken up by grooving, scratching, sandblasting, etching or boring holes therein. Oxidation may be effected in steam at 1000 DEG C. or 1100 DEG C. or in carbon dioxide containing not more than 10 per cent. of carbon monoxide at 1000 DEG C. Specification 16902/11, [Class 1 (iii)], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL709937X | 1950-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709937A true GB709937A (en) | 1954-06-02 |
Family
ID=19812175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14663/51A Expired GB709937A (en) | 1950-06-21 | 1951-06-20 | Preparation of articles having at least a coherent and homogeneous surface layer of magnetite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB709937A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5786296A (en) | 1994-11-09 | 1998-07-28 | American Scientific Materials Technologies L.P. | Thin-walled, monolithic iron oxide structures made from steels |
| US6051203A (en) | 1996-04-30 | 2000-04-18 | American Scientific Materials Technologies, L.P. | Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures |
| US6461562B1 (en) | 1999-02-17 | 2002-10-08 | American Scientific Materials Technologies, Lp | Methods of making sintered metal oxide articles |
-
1951
- 1951-06-20 GB GB14663/51A patent/GB709937A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5786296A (en) | 1994-11-09 | 1998-07-28 | American Scientific Materials Technologies L.P. | Thin-walled, monolithic iron oxide structures made from steels |
| US5814164A (en) | 1994-11-09 | 1998-09-29 | American Scientific Materials Technologies L.P. | Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures |
| US6051203A (en) | 1996-04-30 | 2000-04-18 | American Scientific Materials Technologies, L.P. | Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures |
| US6071590A (en) | 1996-04-30 | 2000-06-06 | American Scientific Materials Technologies, L.P. | Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures |
| US6077370A (en) | 1996-04-30 | 2000-06-20 | American Scientific Materials Technologies, L.P. | Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures |
| US6461562B1 (en) | 1999-02-17 | 2002-10-08 | American Scientific Materials Technologies, Lp | Methods of making sintered metal oxide articles |
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