GB636954A - Lustrous zinc and method for production thereof - Google Patents
Lustrous zinc and method for production thereofInfo
- Publication number
- GB636954A GB636954A GB14212/47A GB1421247A GB636954A GB 636954 A GB636954 A GB 636954A GB 14212/47 A GB14212/47 A GB 14212/47A GB 1421247 A GB1421247 A GB 1421247A GB 636954 A GB636954 A GB 636954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ozs
- gal
- zinc
- chromic acid
- solution
- 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
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title abstract 5
- 239000011701 zinc Substances 0.000 title abstract 5
- 229910052725 zinc Inorganic materials 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 3
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical compound OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000004160 Ammonium persulphate Substances 0.000 abstract 1
- 240000004670 Glycyrrhiza echinata Species 0.000 abstract 1
- 235000001453 Glycyrrhiza echinata Nutrition 0.000 abstract 1
- 235000006200 Glycyrrhiza glabra Nutrition 0.000 abstract 1
- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 abstract 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 abstract 1
- 235000019395 ammonium persulphate Nutrition 0.000 abstract 1
- 238000005282 brightening Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000004070 electrodeposition Methods 0.000 abstract 1
- 229940010454 licorice Drugs 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 abstract 1
- 239000000080 wetting agent Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Chemical Treatment Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
To produce a lustrous zinc surface and to protect such surface against corrosion, particularly zinc surfaces produced by electrodeposition from baths containing no brightening agents, the zinc surface is treated with a chromic acid solution which forms on the zinc a yellow-brown iridescent stain and then subjecting the surface to treatment with an alkaline reducing solution of hydrosulphite until the stains are removed and a bright lustrous finish is obtained. The chromic acid solution may comprise 34-36 ozs./gal. of chromic acid, 3.4-4.6 ozs./gal. of ammonium persulphate and a stable wetting agent such as licorice powder, the remainder being water. The hydrosulphite solution may contain 1-1.5 ozs./gal. sodium hydroxide and 1-1.5 ozs./gal. of sodium hydro-sulphite and the remainder water.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US612304A US2548419A (en) | 1945-08-23 | 1945-08-23 | Method for production of lustrous zinc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB636954A true GB636954A (en) | 1950-05-10 |
Family
ID=24452607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14212/47A Expired GB636954A (en) | 1945-08-23 | 1947-05-28 | Lustrous zinc and method for production thereof |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2548419A (en) |
| GB (1) | GB636954A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014821A (en) * | 1959-06-26 | 1961-12-26 | Metal & Tuermit Corp | Process of producing dyed chromate surfaces on zinc and cadmium |
| EP0220872A2 (en) * | 1985-10-21 | 1987-05-06 | Torcad Limited | Process for improving corrosion resistance of zinc or cadmium plated metal articles |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2796361A (en) * | 1953-04-15 | 1957-06-18 | Poor & Co | Method of making corrosion protected articles |
| US2793967A (en) * | 1953-06-02 | 1957-05-28 | Poor & Co | Sealing composition and method |
| US3457124A (en) * | 1966-09-07 | 1969-07-22 | Cowles Chem Co | Chromate conversion coatings |
| GB1532230A (en) * | 1975-11-24 | 1978-11-15 | Imasa Ltd | Treatment of chromated metal surfaces with sulphur-compounds |
| US4328046A (en) * | 1980-10-14 | 1982-05-04 | Western Electric Co., Inc. | Chromate conversion coatings |
| JP4911920B2 (en) * | 2005-05-18 | 2012-04-04 | 英夫 吉田 | Extraction method of hexavalent chromium |
| US20090014094A1 (en) * | 2007-07-12 | 2009-01-15 | Joseph Kuezynski | Methods for Reducing Hexavalent Chromium in Trivalent Chromate Conversion Coatings |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE572342C (en) * | 1931-05-23 | 1933-03-14 | Finckh G M B H Dr | Process for preventing tarnishing of surfaces made of silver or a silver alloy |
| US2186579A (en) * | 1933-06-28 | 1940-01-09 | Udylite Corp | Method of brightening metals electronegative to iron |
| US2154469A (en) * | 1934-12-17 | 1939-04-18 | Du Pont | Bright dip |
| US2206064A (en) * | 1936-09-16 | 1940-07-02 | Patents Corp | Metal treating process |
| BE434749A (en) * | 1938-06-08 | |||
| US2376158A (en) * | 1942-06-02 | 1945-05-15 | Ford Motor Co | Surface treatment of zinc and cadmium |
| US2433723A (en) * | 1943-12-30 | 1947-12-30 | Theophil J Wieczorek | Solution for smoothing zinc surfaces |
-
1945
- 1945-08-23 US US612304A patent/US2548419A/en not_active Expired - Lifetime
-
1947
- 1947-05-28 GB GB14212/47A patent/GB636954A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014821A (en) * | 1959-06-26 | 1961-12-26 | Metal & Tuermit Corp | Process of producing dyed chromate surfaces on zinc and cadmium |
| EP0220872A2 (en) * | 1985-10-21 | 1987-05-06 | Torcad Limited | Process for improving corrosion resistance of zinc or cadmium plated metal articles |
| EP0220872A3 (en) * | 1985-10-21 | 1988-11-23 | Torcad Limited | Process for improving corrosion resistance of zinc or cadmium plated metal articles |
Also Published As
| Publication number | Publication date |
|---|---|
| US2548419A (en) | 1951-04-10 |
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