GB379752A - Improvements in or relating to the cementation of iron and steel and their alloys - Google Patents
Improvements in or relating to the cementation of iron and steel and their alloysInfo
- Publication number
- GB379752A GB379752A GB16454/31A GB1645431A GB379752A GB 379752 A GB379752 A GB 379752A GB 16454/31 A GB16454/31 A GB 16454/31A GB 1645431 A GB1645431 A GB 1645431A GB 379752 A GB379752 A GB 379752A
- Authority
- GB
- United Kingdom
- Prior art keywords
- salts
- cyanides
- bath
- cementation
- alkaline
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
In a process for maintaining the activity of cyanide cementation baths, the alkalies or alkaline-reacting substances, which are formed by the decomposition of the cyanides and which hinder the cementation process, are rendered innocuous by being converted into non-alkaline or less alkaline substances by the periodic or gradual addition, during the process, to the melt bath of salts other than cyanides, e.g. chlorides, of elements the cyanides of which decompose more readily than the cyanides already present in the bath, the cations of these salts being less electropositive than those of salts already present. The salts may also be added in conjunction with the fresh supplies of cementing substances when replenishing the bath, the composition of the mixture being so selected that it contains sufficient cyanide to produce the original cyanide content of the bath and also a sufficient quantity of the salts to produce the same conditions as at the commencement of the process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE379752X | 1930-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB379752A true GB379752A (en) | 1932-09-05 |
Family
ID=6344747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16454/31A Expired GB379752A (en) | 1930-06-07 | 1931-06-05 | Improvements in or relating to the cementation of iron and steel and their alloys |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES123138A1 (en) |
| GB (1) | GB379752A (en) |
-
1931
- 1931-06-05 GB GB16454/31A patent/GB379752A/en not_active Expired
- 1931-06-06 ES ES0123138A patent/ES123138A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES123138A1 (en) | 1931-09-16 |
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