GB464656A - Improvements in and relating to the process of blackening iron and steel, and protecting the same from rust - Google Patents
Improvements in and relating to the process of blackening iron and steel, and protecting the same from rustInfo
- Publication number
- GB464656A GB464656A GB1011/36A GB101136A GB464656A GB 464656 A GB464656 A GB 464656A GB 1011/36 A GB1011/36 A GB 1011/36A GB 101136 A GB101136 A GB 101136A GB 464656 A GB464656 A GB 464656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- per cent
- rust
- mixture
- bath
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/86—Regeneration of coating baths
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Iron or steel is freed from rust, blackened, and rendered rust-resistant by immersion in a bath consisting of between 0,9 and 1,1 parts by weight of water and 2 parts of a mixture of sodium nitrite, sodium nitrate, and sodium hydroxide in equal or approximately equal proportions, with or without a small quantity, e.g. about 1 per cent of sodium carbonate. The bath is used at a temperature of 145--155 DEG C. A bath formed by dissolving a mixture comprising 1 per cent of sodium carbonate and 33 per cent of each of sodium nitrite, sodium nitrate, and sodium hydroxide may be regenerated by adding a mixture consisting of 80 per cent of sodium hydroxide, 9 per cent of sodium nitrite, 9 per cent of sodium nitrate, and 2 per cent of sodium carbonate. British Specification 200,892, [Class 82 (ii)], and French Specification 731,959 are referred to.ALSO:Iron or steel is freed from rust, blackened, and rendered rust-resistant by immersion in a bath consisting of between 0,9 and 1,1 parts by weight of water and 2 parts of a mixture of sodium nitrite, sodium nitrate, and sodium hydroxide in equal or approximately equal proportions, with or without a small quantity, e.g. about 1 per cent, of sodium carbonate. The bath is used at a temperature of 145-155 DEG C. A bath formed by dissolving a mixture comprising 1 per cent of sodium carbonate and 33 per cent of each of sodium nitrite, sodium nitrate, and sodium hydroxide may be regenerated by adding a mixture consisting of 80 per cent of sodium hydroxide, 9 per cent of sodium nitrite, 9 per cent of sodium nitrate, and 2 per cent of sodium carbonate. British Specification 200,892, [Class 82 (ii)], and French Specification 731,959 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1011/36A GB464656A (en) | 1936-01-11 | 1936-01-11 | Improvements in and relating to the process of blackening iron and steel, and protecting the same from rust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1011/36A GB464656A (en) | 1936-01-11 | 1936-01-11 | Improvements in and relating to the process of blackening iron and steel, and protecting the same from rust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB464656A true GB464656A (en) | 1937-04-22 |
Family
ID=9714579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1011/36A Expired GB464656A (en) | 1936-01-11 | 1936-01-11 | Improvements in and relating to the process of blackening iron and steel, and protecting the same from rust |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB464656A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2431728A (en) * | 1942-04-29 | 1947-12-02 | Despo Mfg Co Ltd | Treatment of ferrous metals to improve resistance to rusting |
| EP1189330A3 (en) * | 2000-08-23 | 2004-01-02 | Sew-Eurodrive GmbH & Co. KG | Geared motor and process for treating a component of a geared motor |
| CN103255406A (en) * | 2013-05-16 | 2013-08-21 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface treatment method of round steel camshaft and round steel camshaft |
-
1936
- 1936-01-11 GB GB1011/36A patent/GB464656A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2431728A (en) * | 1942-04-29 | 1947-12-02 | Despo Mfg Co Ltd | Treatment of ferrous metals to improve resistance to rusting |
| EP1189330A3 (en) * | 2000-08-23 | 2004-01-02 | Sew-Eurodrive GmbH & Co. KG | Geared motor and process for treating a component of a geared motor |
| DE10041422B4 (en) | 2000-08-23 | 2018-12-13 | Sew-Eurodrive Gmbh & Co Kg | Method for anticorrosion treatment of a shaft or hollow shaft of a gear motor and geared motor |
| CN103255406A (en) * | 2013-05-16 | 2013-08-21 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface treatment method of round steel camshaft and round steel camshaft |
| CN103255406B (en) * | 2013-05-16 | 2016-03-02 | 浙江吉利汽车研究院有限公司杭州分公司 | The surface treatment method of round steel camshaft and round steel camshaft |
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