GB748372A - A method for inactivating metallic powder - Google Patents
A method for inactivating metallic powderInfo
- Publication number
- GB748372A GB748372A GB25238/53A GB2523853A GB748372A GB 748372 A GB748372 A GB 748372A GB 25238/53 A GB25238/53 A GB 25238/53A GB 2523853 A GB2523853 A GB 2523853A GB 748372 A GB748372 A GB 748372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxidation
- acid
- powder
- heating
- air
- 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
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0083—Treatment of solid structures, e.g. for coating or impregnating with a modifier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Metallic powders are inactivated by coating with a heavy layer of oxide, of greater thickness than that formed by oxidation in air at ordinary temperature, and then impregnating with a fatty acid having more than ten carbon atoms in the molecule. Oxidation may be effected by means of an oxidising liquid by heating in a mixture of rare gas and oxygen, or by heating in air e.g. at 400 DEG -600 DEG C. for Al, at 300 DEG -400 DEG C. for Mg, or at 200 DEG -300 DEG C. for Zn; the oxidised powder may then be cooled in water and dried prior to impregnation. The acid may be stearic, palmitic or oleic and may be applied in organic solvents such as benzene and alcohol mixtures. The powder may be pickled before oxidation e.g. in aqueous nitric acid for Al, in ammonium chloride solution for Mg. or in oxalic acid solution for Zn.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE748372X | 1952-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB748372A true GB748372A (en) | 1956-05-02 |
Family
ID=20323292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25238/53A Expired GB748372A (en) | 1952-09-19 | 1953-09-11 | A method for inactivating metallic powder |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1083843A (en) |
| GB (1) | GB748372A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1294139B (en) * | 1962-12-13 | 1969-04-30 | Walter Marx & Co Kg | Process for the chemical oxidation of powdery aluminum or magnesium and alloys of the metals mentioned |
-
1953
- 1953-09-11 GB GB25238/53A patent/GB748372A/en not_active Expired
- 1953-09-18 FR FR1083843D patent/FR1083843A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1083843A (en) | 1955-01-12 |
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