GB1097197A - Colouring nickel-containing stainless steel - Google Patents
Colouring nickel-containing stainless steelInfo
- Publication number
- GB1097197A GB1097197A GB4705165A GB4705165A GB1097197A GB 1097197 A GB1097197 A GB 1097197A GB 4705165 A GB4705165 A GB 4705165A GB 4705165 A GB4705165 A GB 4705165A GB 1097197 A GB1097197 A GB 1097197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- film
- stainless steel
- blue
- red
- 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)
- ing And Chemical Polishing (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Chromium-nickel stainless steel, which preferably contains at least 8% nickel is electrolytically coloured by the passage of an alternating current using as electrolyte a solution containing 0.5-10M chromic acid, with or without sulphuric acid. The chromic acid to sulphate present by weight is preferably at least 10:1. The steel may be formed with a gold coating, which may be changed to red or blue either by continuing the electrolysis at a higher temperature e.g. 60 DEG C. for red and 90 DEG C. for blue; or by heating the gold film in air in the temperature range 300 DEG -700 DEG C. until the film reaches the desired colour. The initial film may be formed using a current density of 300-1000 Amps/sq. ft. and a temperature below 40 DEG C. The frequency used may be 15-100c/s. The film may be partially removed to form design or lettering using a wax resist and hydrochloric acid as etchant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4705165A GB1097197A (en) | 1965-11-05 | 1965-11-05 | Colouring nickel-containing stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4705165A GB1097197A (en) | 1965-11-05 | 1965-11-05 | Colouring nickel-containing stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1097197A true GB1097197A (en) | 1967-12-29 |
Family
ID=10443525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4705165A Expired GB1097197A (en) | 1965-11-05 | 1965-11-05 | Colouring nickel-containing stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1097197A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755117A (en) * | 1970-05-26 | 1973-08-28 | Int Nickel Co | Coating stainless steels |
| GB2187760A (en) * | 1986-02-21 | 1987-09-16 | Kinki Yakuhin Kogyo Kk | Electrolytic colouring of chromium alloy |
| ITPS20100025A1 (en) * | 2010-10-19 | 2012-04-20 | Dmm S P A | SURFACE FINISH PROCEDURE OF STAINLESS STEEL AND STAINLESS STEEL SURFACES WITH THIS PROCEDURE OBTAINED. |
-
1965
- 1965-11-05 GB GB4705165A patent/GB1097197A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755117A (en) * | 1970-05-26 | 1973-08-28 | Int Nickel Co | Coating stainless steels |
| GB2187760A (en) * | 1986-02-21 | 1987-09-16 | Kinki Yakuhin Kogyo Kk | Electrolytic colouring of chromium alloy |
| GB2187760B (en) * | 1986-02-21 | 1990-08-22 | Kinki Yakuhin Kogyo Kk | Electrolytic coloring method for chromium alloy |
| ITPS20100025A1 (en) * | 2010-10-19 | 2012-04-20 | Dmm S P A | SURFACE FINISH PROCEDURE OF STAINLESS STEEL AND STAINLESS STEEL SURFACES WITH THIS PROCEDURE OBTAINED. |
| EP2444529A1 (en) * | 2010-10-19 | 2012-04-25 | DMM S.p.A. | Stainless steel surface finishing process and stainless steel panels obtained by said process |
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