GB1187785A - Chromate-Coated Chromium Plated Steels and Two-Step processes for the preparation thereof by Electrolytic Treatment - Google Patents
Chromate-Coated Chromium Plated Steels and Two-Step processes for the preparation thereof by Electrolytic TreatmentInfo
- Publication number
- GB1187785A GB1187785A GB1408667A GB1408667A GB1187785A GB 1187785 A GB1187785 A GB 1187785A GB 1408667 A GB1408667 A GB 1408667A GB 1408667 A GB1408667 A GB 1408667A GB 1187785 A GB1187785 A GB 1187785A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- bath
- chromate
- amps
- current density
- 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
- 239000011651 chromium Substances 0.000 title abstract 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title abstract 7
- 229910052804 chromium Inorganic materials 0.000 title abstract 7
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000009713 electroplating Methods 0.000 abstract 2
- 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 2
- 239000004922 lacquer Substances 0.000 abstract 2
- 239000001117 sulphuric acid Substances 0.000 abstract 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract 2
- 229910004074 SiF6 Inorganic materials 0.000 abstract 1
- 235000010724 Wisteria floribunda Nutrition 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 238000004532 chromating Methods 0.000 abstract 1
- 239000010960 cold rolled steel Substances 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 1
- 230000007717 exclusion Effects 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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)
- Electroplating Methods And Accessories (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
1,187,785. Chromate-coated chromium plated steel. FUJI IRON & STEEL CO. Ltd. March 28, 1967 [March 26, 1966; Nov.11, 1966], No.14086/67. Heading C7B. Chromate-coated chromium plated steel strip is produced by first electro-plating it with chromium to a thickness of from 0À0016 to 0À1Á and thereafter subjecting the chromium-plated strip to electrolysis as a cathode in an aqueous bath containing chromic acid but free of metallic chromium electro-plating catalysts (this exclusion not covering silicofluoride ions) to form on it a chromate coating of thickness up to 0À1 mg Cr/dm<SP>2</SP> as measured by a test defined in the Specification. The steel strip treated may have a matt surface e.g. of roughness 0À8 to 3Á r.m.s. as in Specification 1,125,495, and the doubly treated strip may have a final coating of an organic film-former e.g. a resin or lacquer applied to it. The chromating bath may contain 10 to 150 g/1 CrO 3 but if silicofluoride is present, preferably Na 2 SiF6, the bath contains 10 to 100 g/1 CrO 3 and 1 to 2À5 g/1 SiF 6 . The bath may be used at 10 to 70‹ C. with a current density of 1 to 20 amps/ dm<SP>2</SP> and a treating time of 0À2 to 3 seconds. In an example cold rolled steel sheet is electrolytically degreased in dilute caustic soda solution at 90‹ C.; washed with water; acid pickled in dilute sulphuric acid; washed; electro-plated with chromium from a sulphuric acid catalyzed chromic acid bath at 50‹ C. with a current density of 40 amps/dm<SP>2</SP> for 1 second; cathodically chromated from a bath containing 50 g/ CrO 3 and 2 g/1 Na 2 SiF s at 40‹ C. with a current density of 5 amps/dm<SP>2</SP> for 2 seconds; and finally coated with an organic lacquer of the type described in Specification 939,136. The chromium plating bath may also be as described in that Specification viz 130 to 170 g/l Cr0 3 , 0À2 to 0-4 g/l H 2 SO 4 , and 3 to 7 g/l Na 2 SiF 6 and may be used at about 50‹ C. with a current density of 20 to 80 amps/dm<SP>2</SP> for a treatment time of 5 to 1À25 seconds.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1852266 | 1966-03-26 | ||
| JP7414766 | 1966-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1187785A true GB1187785A (en) | 1970-04-15 |
Family
ID=26355198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1408667A Expired GB1187785A (en) | 1966-03-26 | 1967-03-28 | Chromate-Coated Chromium Plated Steels and Two-Step processes for the preparation thereof by Electrolytic Treatment |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE696034A (en) |
| DE (1) | DE1621076B1 (en) |
| FR (1) | FR1575515A (en) |
| GB (1) | GB1187785A (en) |
| NL (1) | NL151142B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755117A (en) * | 1970-05-26 | 1973-08-28 | Int Nickel Co | Coating stainless steels |
| DE2918553A1 (en) * | 1978-05-08 | 1979-11-15 | Toyo Seikan Kaisha Ltd | JAR MADE FROM ELECTROLYTIC CHROMED STEEL SHEET |
| JPS58177490A (en) * | 1982-04-13 | 1983-10-18 | Kawasaki Steel Corp | Production of tin-free steel plate |
| US4857436A (en) * | 1987-12-28 | 1989-08-15 | Nouel Jean Marie | Offset plates with two chromium layers |
| US4996131A (en) * | 1987-12-28 | 1991-02-26 | Nouel Jean Marie | Offset plate with thin chromium layer and method of making |
| US6254652B1 (en) * | 1995-04-13 | 2001-07-03 | Marathon Ashland Petroleum Llc | At least three-step molten metal decomposition process cycle |
| CN103122470A (en) * | 2011-11-17 | 2013-05-29 | 符士正 | Automobile cast iron die plating solution |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55134197A (en) * | 1979-04-05 | 1980-10-18 | Toyo Kohan Co Ltd | Electrolytic chromic acid treating steel sheet for adhesion can |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2733199A (en) * | 1956-01-31 | Electrolytic treatment of metal |
-
1967
- 1967-03-24 BE BE696034D patent/BE696034A/xx not_active IP Right Cessation
- 1967-03-24 FR FR1575515D patent/FR1575515A/fr not_active Expired
- 1967-03-28 NL NL6704414A patent/NL151142B/en not_active IP Right Cessation
- 1967-03-28 GB GB1408667A patent/GB1187785A/en not_active Expired
- 1967-03-28 DE DE1967F0051956 patent/DE1621076B1/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755117A (en) * | 1970-05-26 | 1973-08-28 | Int Nickel Co | Coating stainless steels |
| DE2918553A1 (en) * | 1978-05-08 | 1979-11-15 | Toyo Seikan Kaisha Ltd | JAR MADE FROM ELECTROLYTIC CHROMED STEEL SHEET |
| JPS58177490A (en) * | 1982-04-13 | 1983-10-18 | Kawasaki Steel Corp | Production of tin-free steel plate |
| US4857436A (en) * | 1987-12-28 | 1989-08-15 | Nouel Jean Marie | Offset plates with two chromium layers |
| US4996131A (en) * | 1987-12-28 | 1991-02-26 | Nouel Jean Marie | Offset plate with thin chromium layer and method of making |
| US6254652B1 (en) * | 1995-04-13 | 2001-07-03 | Marathon Ashland Petroleum Llc | At least three-step molten metal decomposition process cycle |
| CN103122470A (en) * | 2011-11-17 | 2013-05-29 | 符士正 | Automobile cast iron die plating solution |
Also Published As
| Publication number | Publication date |
|---|---|
| NL151142B (en) | 1976-10-15 |
| DE1621076B1 (en) | 1971-08-26 |
| NL6704414A (en) | 1967-09-27 |
| FR1575515A (en) | 1969-07-25 |
| BE696034A (en) | 1967-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE | Patent expired |