GB735933A - Improvements in or relating to the blacking of ferrous metal parts - Google Patents
Improvements in or relating to the blacking of ferrous metal partsInfo
- Publication number
- GB735933A GB735933A GB30286/51A GB3028651A GB735933A GB 735933 A GB735933 A GB 735933A GB 30286/51 A GB30286/51 A GB 30286/51A GB 3028651 A GB3028651 A GB 3028651A GB 735933 A GB735933 A GB 735933A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- parts
- per cent
- bath
- blacking
- 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
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)
- Chemical Treatment Of Metals (AREA)
Abstract
A bath for blackening ferrous surfaces consists of an aqueous solution of 25 parts of sodium or potassium hydroxide or both and 3-10 parts of sodium or potassium thiosulphate or both. It may also contain 3-8 parts of sodium or potassium nitrate or both; the amount of water may be such as to yield a boiling point of 240-260 DEG F., at which temperature the bath may be used. The ferrous surfaces may be first immersed in an alkali cleaner, washed and then immersed in a pretreatment bath comprising 87 per cent of phosphoric acid (of 85 per cent concentration) and 13 per cent concentrated hydrochloric acid, with or without water and with or without a wetting agent of the sodium aryl sulphonate type. After blacking, the surfaces may be rinsed, dried and dipped in hot oil.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US735933XA | 1951-01-24 | 1951-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB735933A true GB735933A (en) | 1955-08-31 |
Family
ID=22114621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30286/51A Expired GB735933A (en) | 1951-01-24 | 1951-12-28 | Improvements in or relating to the blacking of ferrous metal parts |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1038499A (en) |
| GB (1) | GB735933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779531A (en) * | 2020-12-08 | 2021-05-11 | 广东山之风环保科技有限公司 | Treatment process for coloring black oxide film on metal surface |
-
1951
- 1951-06-18 FR FR1038499D patent/FR1038499A/en not_active Expired
- 1951-12-28 GB GB30286/51A patent/GB735933A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779531A (en) * | 2020-12-08 | 2021-05-11 | 广东山之风环保科技有限公司 | Treatment process for coloring black oxide film on metal surface |
| CN112779531B (en) * | 2020-12-08 | 2024-02-02 | 广东山之风环保科技有限公司 | Treatment process for coloring black oxide film on metal surface |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1038499A (en) | 1953-09-29 |
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