GB886594A - Improvements in coating metal surfaces - Google Patents
Improvements in coating metal surfacesInfo
- Publication number
- GB886594A GB886594A GB3208259A GB3208259A GB886594A GB 886594 A GB886594 A GB 886594A GB 3208259 A GB3208259 A GB 3208259A GB 3208259 A GB3208259 A GB 3208259A GB 886594 A GB886594 A GB 886594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- sulphur dioxide
- coating
- nickel
- accelerator
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/46—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 aqueous acidic solutions with pH less than 6 containing oxalates
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 solution of sulphur dioxide in aqueous ammonia is used as accelerator in an oxalic acid coating solution. The accelerator solution may be used both in the initial preparation of the coating solution as well as in the replenishment thereof, and preferably contains, by weight, at least 30% sulphur dioxide and a ratio of SO2/NH3 between 3,5 and 4,5. The concentration of sulphur dioxide in the coating solution should be maintained between 0,3 and 6 g/l. The Examples relate to the coating of 18/8 Cr-Ni stainless steel: in one case the solution also contains ammonium bisulphate. For the treatment of steels which are more difficult to coat, the solution may also contain a halogen, ferricyanide or thiocyanate. Coatings may be formed on other metals, e.g. copper, nickel, chromium and nickel-chromium alloys.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3208259A GB886594A (en) | 1959-09-21 | 1959-09-21 | Improvements in coating metal surfaces |
| FR839061A FR1271331A (en) | 1959-09-21 | 1960-09-20 | Method of coating metal surfaces |
| BE595231A BE595231A (en) | 1959-09-21 | 1960-09-20 | Method of coating metal surfaces. |
| CH1068360A CH385589A (en) | 1959-09-21 | 1960-09-21 | Process for applying coatings to surfaces of oxalatable metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3208259A GB886594A (en) | 1959-09-21 | 1959-09-21 | Improvements in coating metal surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB886594A true GB886594A (en) | 1962-01-10 |
Family
ID=10332935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3208259A Expired GB886594A (en) | 1959-09-21 | 1959-09-21 | Improvements in coating metal surfaces |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE595231A (en) |
| CH (1) | CH385589A (en) |
| GB (1) | GB886594A (en) |
-
1959
- 1959-09-21 GB GB3208259A patent/GB886594A/en not_active Expired
-
1960
- 1960-09-20 BE BE595231A patent/BE595231A/en unknown
- 1960-09-21 CH CH1068360A patent/CH385589A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE595231A (en) | 1961-01-16 |
| CH385589A (en) | 1964-12-15 |
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