GB1031792A - Method of chemically treating metals by electrolysis - Google Patents
Method of chemically treating metals by electrolysisInfo
- Publication number
- GB1031792A GB1031792A GB1570/63A GB157063A GB1031792A GB 1031792 A GB1031792 A GB 1031792A GB 1570/63 A GB1570/63 A GB 1570/63A GB 157063 A GB157063 A GB 157063A GB 1031792 A GB1031792 A GB 1031792A
- Authority
- GB
- United Kingdom
- Prior art keywords
- article
- solution
- electrodeposition
- chromate
- ion
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/38—Chromatising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
A metal article is electrolytically treated as cathode in an aqueous solution comprising 5-50g/l hexavalent Cr ion and 10-200 ppm halogen ion, the pH of the solution being adjusted to below 1.3 and the temperature kept at 10-80 DEG C. It is suggested that the corrosion resistant film produced by the treatment is of chromium chromate. The Cr6+ may be supplied by chromic anhydride, a dichromate or a chromate and the halogen ion by HCl, HF, a chloride, a fluoride, a fluotitanate or boron fluoride. Cr3+ may be added, e.g. as chromium acetate, to improve the dryability and H3PO4 to improve paint adhesiveness and uniformity of the deposit. The colour of the film depends on its thickness. Prior to the electrodeposition, the article, e.g. a steel sheet which may be galvanized or Al plated, may be defatted and be painted with a solution containing Cr6+. After electrodeposition, residual solution on the article may be dried or washed off.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP186762 | 1962-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1031792A true GB1031792A (en) | 1966-06-02 |
Family
ID=11513482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1570/63A Expired GB1031792A (en) | 1962-01-20 | 1963-01-14 | Method of chemically treating metals by electrolysis |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3257295A (en) |
| DE (1) | DE1521096B2 (en) |
| GB (1) | GB1031792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617095A (en) * | 1985-06-24 | 1986-10-14 | Omi International Corporation | Electrolytic post treatment of chromium substrates |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131198A (en) * | 1979-03-30 | 1980-10-11 | Toyo Kohan Co Ltd | Electrolytic chromic acid treating steel sheet for adhesion can |
| JPS5729597A (en) | 1980-07-28 | 1982-02-17 | Teksid Spa | Long life thin plate for automobile body and method |
| IT1212859B (en) * | 1983-03-21 | 1989-11-30 | Centro Speriment Metallurg | LAMINATED STEEL PLATES PERFECTED COATED |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2733199A (en) * | 1956-01-31 | Electrolytic treatment of metal | ||
| FR1080914A (en) * | 1953-06-16 | 1954-12-14 | United States Steel Corp | Electrochemical process for coating steel surfaces, products intended for its implementation and resulting products |
| US3032487A (en) * | 1958-05-30 | 1962-05-01 | Yawata Iron & Steel Co | Electrolytic treatment of ferrous metal surfaces |
| GB915426A (en) * | 1958-05-30 | 1963-01-09 | Yawata Iron & Steel Co | Electrolytic treatment of metal surfaces |
| US2998361A (en) * | 1958-06-11 | 1961-08-29 | Toyo Kohan Co Ltd | Electrochemical treatment of metal surfaces and the products thereof |
| US3175964A (en) * | 1960-01-23 | 1965-03-30 | Yawata Iron & Steel Co | Surface treatment of metal article by water-soluble (film-forming) material |
-
1963
- 1963-01-14 US US251002A patent/US3257295A/en not_active Expired - Lifetime
- 1963-01-14 GB GB1570/63A patent/GB1031792A/en not_active Expired
- 1963-01-18 DE DE19631521096 patent/DE1521096B2/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4617095A (en) * | 1985-06-24 | 1986-10-14 | Omi International Corporation | Electrolytic post treatment of chromium substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1521096A1 (en) | 1970-08-20 |
| US3257295A (en) | 1966-06-21 |
| DE1521096B2 (en) | 1971-10-07 |
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