GB563025A - Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith - Google Patents
Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewithInfo
- Publication number
- GB563025A GB563025A GB979/43A GB97943A GB563025A GB 563025 A GB563025 A GB 563025A GB 979/43 A GB979/43 A GB 979/43A GB 97943 A GB97943 A GB 97943A GB 563025 A GB563025 A GB 563025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zinc
- acid
- grams
- sulphuric
- cadmium
- 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)
- Electrolytic Production Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
- ing And Chemical Polishing (AREA)
Abstract
563,025. Electrolysis. FORD MOTOR CO., Ltd. Jan. 19; 1943, No. 979. Convention date, June 2, 1942. Drawings to Specification. [Class 41] [Also in Group II] To produce high lustre durability and a surface capable of being painted on the surface of zinc or cadmium or metal coated therewith, the zinc &c. is immersed, e.g. for a period not exceeding 60 seconds, in a chromic acid bath which includes minute amounts of sulphuric and nitric acids, the ratio of the chromic acid to the combined amounts of the other acids being at least 100 to 1 and the nitric acid being present in an amount in excess of the sulphuric acid. A transparent enamel such as an alkyde resin mixed with a melamine resin and dissolved in petrolein naphtha, may be applied after the zinc &c. has been dipped in the acid. In an example, a bath comprises 120 grams of chromic acid, 0.25-0.50 grams of sulphuric acid and 0.8-1.20 grams of nitric acid all per litre of solution. A zinc coating for treatment as set out above, is electro-deposited from a bath containing 8 ozs. per gallon of zinc cyanide, 4'of sodium cyanide and 7 of caustic soda with anodes formed by remelting scrap die castings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US563025XA | 1942-06-02 | 1942-06-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB563025A true GB563025A (en) | 1944-07-26 |
Family
ID=22003505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB979/43A Expired GB563025A (en) | 1942-06-02 | 1943-01-19 | Improvements in and relating to the surface treatment of zinc or cadmium or metals coated therewith |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB563025A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1084103B (en) * | 1953-03-13 | 1960-06-23 | Armco Int Corp | Process for the production of corrosion-resistant, unpainted and shiny metal zinc or aluminum surfaces |
-
1943
- 1943-01-19 GB GB979/43A patent/GB563025A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1084103B (en) * | 1953-03-13 | 1960-06-23 | Armco Int Corp | Process for the production of corrosion-resistant, unpainted and shiny metal zinc or aluminum surfaces |
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