GB673204A - Improvements in or relating to the production of metallic powders - Google Patents
Improvements in or relating to the production of metallic powdersInfo
- Publication number
- GB673204A GB673204A GB293950A GB293950A GB673204A GB 673204 A GB673204 A GB 673204A GB 293950 A GB293950 A GB 293950A GB 293950 A GB293950 A GB 293950A GB 673204 A GB673204 A GB 673204A
- Authority
- GB
- United Kingdom
- Prior art keywords
- steel
- stainless steel
- acid
- sulphuric acid
- crystals
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
- C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
673,204. Electrolytic production of stainless steel powder. BIRMINGHAM SMALL ARMS CO., Ltd. Jan. 30, 1951 [Feb. 4, 1950; Oct. 11, 1950], Nos. 2939/50 and 24785/50. Class 41. A method of producing stainless steel powder comprises heat-treating stainless steel in massive form in order to precipitate carbides on the grain boundaries of the steel, immersing the steel so treated in an electrolytic bath and utilizing the steel as an electrode to induce intergranular attack therein. The method may comprise heating stainless steel in massive form to a temperature above 1000‹ C., allowing the steel to cool to about room temperature, heating it again to a temperature between 500‹ and 800‹ C., substantially maintaining the temperature for a period from one hour to forty hours to precipitate carbides on the grain boundaries, pickling the steel so treated and then immersing it in an electrolytic bath so that it is alternately anode and cathode. Alternatively a plurality of such stainless steel electrodes may be grouped in pairs, each electrode of each pair being alternately connected as anode to, and disconnected from a source of electrical energy, the cathode being a hollow lead cathode through which is circulated cold water. Suitable electrolytes include sulphuric acid with crystals of copper sulphate, mercuric sulphate or potassium dichromate, hydrofluoric acid with sulphuric acid or nitric acid, hydrochloric acid with crystals of copper chloride, and sulphuric acid or orthophosphoric acid with hydrogen peroxide. The hydrogen peroxide or copper sulphate crystals may be added to any of the electrolytes mentioned above, where they are not already included, and ethyl alcohol may be added to solutions of sulphuric acid and copper sulphate or hydrofluoric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB293950A GB673204A (en) | 1950-02-04 | 1950-02-04 | Improvements in or relating to the production of metallic powders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB293950A GB673204A (en) | 1950-02-04 | 1950-02-04 | Improvements in or relating to the production of metallic powders |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB673204A true GB673204A (en) | 1952-06-04 |
Family
ID=9748901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB293950A Expired GB673204A (en) | 1950-02-04 | 1950-02-04 | Improvements in or relating to the production of metallic powders |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB673204A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132109A (en) * | 2011-11-28 | 2013-06-05 | 重庆华浩冶炼有限公司 | Drying and reduction technology of producing copper powder through electrolytic method |
| CN108707932A (en) * | 2018-08-06 | 2018-10-26 | 金川集团股份有限公司 | It can make the device and method of copper powder automatic powder discharging in a kind of electrolytic process |
-
1950
- 1950-02-04 GB GB293950A patent/GB673204A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132109A (en) * | 2011-11-28 | 2013-06-05 | 重庆华浩冶炼有限公司 | Drying and reduction technology of producing copper powder through electrolytic method |
| CN103132109B (en) * | 2011-11-28 | 2016-08-10 | 重庆有研重冶新材料有限公司 | A kind of electrolysis produces the drying reducing process of copper powder |
| CN108707932A (en) * | 2018-08-06 | 2018-10-26 | 金川集团股份有限公司 | It can make the device and method of copper powder automatic powder discharging in a kind of electrolytic process |
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