GB1216770A - Electrodepositing chromium coatings on steel surfaces - Google Patents
Electrodepositing chromium coatings on steel surfacesInfo
- Publication number
- GB1216770A GB1216770A GB09879/68A GB1987968A GB1216770A GB 1216770 A GB1216770 A GB 1216770A GB 09879/68 A GB09879/68 A GB 09879/68A GB 1987968 A GB1987968 A GB 1987968A GB 1216770 A GB1216770 A GB 1216770A
- Authority
- GB
- United Kingdom
- Prior art keywords
- april
- steel surfaces
- chromium coatings
- hydrated
- film
- 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)
- Electroplating And Plating Baths Therefor (AREA)
- Chemical Treatment Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
1,216,770. Electro-depositing chromium or hydrated oxide thereof. NIPPON KOKAN K. K. April 26, 1968 [April 28, 1967], No.19879/68. Heading C7B. An adherent corrosion resistant coating is produced on a steel surface by cathodic reduction is an aqueous solution comprising chromic acid e.g. 50g/ 1 CrO 3 and one or more auxiliary agents selected from thiosulphate, sulphite, (di) thiosulphite, pyrosulphite, bisulphite and sulphide, e. g. 0À75g/ 1 Na 2 S 2 O 3 . 5H 2 O. When a circulation cell is used, e. g. electrolyte flowing at a speed of 70 m/min, a metallic Cr film is formed; when a stationary cell is used, a hydrated chromium oxide film is formed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2711767 | 1967-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1216770A true GB1216770A (en) | 1970-12-23 |
Family
ID=12212107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB09879/68A Expired GB1216770A (en) | 1967-04-28 | 1968-04-26 | Electrodepositing chromium coatings on steel surfaces |
Country Status (3)
Country | Link |
---|---|
US (1) | US3794572A (en) |
FR (1) | FR1572432A (en) |
GB (1) | GB1216770A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041157B2 (en) * | 1982-07-20 | 1985-09-14 | 川崎製鉄株式会社 | Method for manufacturing stain-free steel sheet with excellent retort treatment resistance |
-
1968
- 1968-04-26 GB GB09879/68A patent/GB1216770A/en not_active Expired
- 1968-04-29 FR FR1572432D patent/FR1572432A/fr not_active Expired
-
1970
- 1970-06-01 US US00042505A patent/US3794572A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3794572A (en) | 1974-02-26 |
DE1771280B2 (en) | 1976-01-15 |
FR1572432A (en) | 1969-06-27 |
DE1771280A1 (en) | 1971-11-25 |
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