GB354887A - Improvements in and relating to processes of coating metals - Google Patents
Improvements in and relating to processes of coating metalsInfo
- Publication number
- GB354887A GB354887A GB16319/30A GB1631930A GB354887A GB 354887 A GB354887 A GB 354887A GB 16319/30 A GB16319/30 A GB 16319/30A GB 1631930 A GB1631930 A GB 1631930A GB 354887 A GB354887 A GB 354887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- zinc
- iron
- per cent
- aluminium
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Resistance Heating (AREA)
- Powder Metallurgy (AREA)
Abstract
A metal, e.g. iron, molybdenum, or tungsten, is given a protective coating consisting mainly of chromium by heating it in the atmosphere of an ordinary electric furnace with a mixture of chromium powder and granular zinc to a temperature sufficiently high to volatilize the zinc, e.g. 900 DEG C. The mixture may contain from 5 to 20 per cent by weight of zinc. A small percentage, e.g. 5 per cent, of aluminium may be added to the mixture. A mixture referred to for coating iron contains 10 per cent of zinc, 5 per cent of aluminium, 42,5 per cent of iron-free chromium and 42,5 per cent of iron-bearing chromium having an iron content of about 3 per cent. The zinc vapour surrounds the foundation metal and prevents oxidation. Specification 159,102, [Class 72, Iron &c.], is referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes the coating of iron with aluminium by heating it in a tube with a mixture of aluminium, zinc oxide and aluminium oxide or in a revolving retort with a mixture of aluminium, zinc and aluminium oxide, the temperature being raised to about 1000 DEG C. and the mixture being surrounded with a hydrogen atmosphere. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US354887XA | 1929-05-28 | 1929-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB354887A true GB354887A (en) | 1931-08-20 |
Family
ID=21883012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16319/30A Expired GB354887A (en) | 1929-05-28 | 1930-05-27 | Improvements in and relating to processes of coating metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB354887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772985A (en) * | 1951-08-08 | 1956-12-04 | Thompson Prod Inc | Coating of molybdenum with binary coatings containing aluminum |
-
1930
- 1930-05-27 GB GB16319/30A patent/GB354887A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2772985A (en) * | 1951-08-08 | 1956-12-04 | Thompson Prod Inc | Coating of molybdenum with binary coatings containing aluminum |
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