GB591460A - Improvements in or relating to the coating of metal articles - Google Patents
Improvements in or relating to the coating of metal articlesInfo
- Publication number
- GB591460A GB591460A GB18408/44A GB1840844A GB591460A GB 591460 A GB591460 A GB 591460A GB 18408/44 A GB18408/44 A GB 18408/44A GB 1840844 A GB1840844 A GB 1840844A GB 591460 A GB591460 A GB 591460A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copper
- litre
- cadmium
- zinc
- solution containing
- 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
- C23C22/24—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 hexavalent chromium compounds
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)
- Chemically Coating (AREA)
Abstract
A process of producing a corrosion-resistant coating on zinc, cadmium, alloys thereof, zinc or cadmium-coated material, spelter-coated iron or steel, copper, brass, bronze and other copper alloys comprises a dipping or spraying procedure by means of an aqueous solution containing ZnCl2 added as such and a water-soluble chromium compound from the group chromic acid, chromates, and dichromates, said chromium compound being in predominant amount. In an example hot-dipped galvanized iron is treated after cleaning with a solution containing 60-100 gm./litre of chromic acid and 5-15 gm./litre of ZnCl2 at a temperature of 60 DEG F. to 212 DEG F. for 30 to 240 secs. The Specification as open to inspection under Sect. 91 states also that ZnC.2 may be replaced by MgCl2, NaCl, copper ammonium chloride or SnCl2. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US591460XA | 1943-08-23 | 1943-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB591460A true GB591460A (en) | 1947-08-19 |
Family
ID=22021124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18408/44A Expired GB591460A (en) | 1943-08-23 | 1944-09-26 | Improvements in or relating to the coating of metal articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB591460A (en) |
-
1944
- 1944-09-26 GB GB18408/44A patent/GB591460A/en not_active Expired
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