JPS5569293A - Coloring method of aluminum anodic oxidation film - Google Patents
Coloring method of aluminum anodic oxidation filmInfo
- Publication number
- JPS5569293A JPS5569293A JP13935578A JP13935578A JPS5569293A JP S5569293 A JPS5569293 A JP S5569293A JP 13935578 A JP13935578 A JP 13935578A JP 13935578 A JP13935578 A JP 13935578A JP S5569293 A JPS5569293 A JP S5569293A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- film
- alloy
- anodic oxidation
- bath
- 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.)
- Granted
Links
Landscapes
- Electrochemical Coating By Surface Reaction (AREA)
Abstract
PURPOSE: To obtain a colored film of high hardness and sharp color hue, by applying DC voltage for a specified period of time to Al (alloy) on which Al anodic oxidation film is formed in a sulfamic acid bath, and lowering this voltage as intermediate treatment, then electrolytically coloring Al (alloy).
CONSTITUTION: A DC voltage is applied for a specified period of time to Al (alloy) on which Al anodic oxidation film is formed, in a single bath of aqueous solution of sulfamic acid (10W100g/l) or in a bath mixed with sulfuric acid (1W5g/l) or oxalic acid (1W10g/l). As an intermediate treatment, the DC voltage applied 10W80V is reduced to 5W20V at a rate of (2W10)V/min. Then, the Al (alloy) is colored in an electrolytic coloring solution by ordinary method. In this process, because of the intermediate treatment to drop the voltage, the hardness is higher, as compared with the conventional method of forming a film for several minutes as a secondary process in a bath containing (pyro) phosphoric acid, and also the film is hardly soiled, so that a clear, sharp colored film may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13935578A JPS5569293A (en) | 1978-11-14 | 1978-11-14 | Coloring method of aluminum anodic oxidation film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13935578A JPS5569293A (en) | 1978-11-14 | 1978-11-14 | Coloring method of aluminum anodic oxidation film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5569293A true JPS5569293A (en) | 1980-05-24 |
JPS5738680B2 JPS5738680B2 (en) | 1982-08-17 |
Family
ID=15243389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13935578A Granted JPS5569293A (en) | 1978-11-14 | 1978-11-14 | Coloring method of aluminum anodic oxidation film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5569293A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1301345C (en) * | 2004-02-26 | 2007-02-21 | 陈刚 | Hardencing anode treating process of electronic actuator |
-
1978
- 1978-11-14 JP JP13935578A patent/JPS5569293A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1301345C (en) * | 2004-02-26 | 2007-02-21 | 陈刚 | Hardencing anode treating process of electronic actuator |
Also Published As
Publication number | Publication date |
---|---|
JPS5738680B2 (en) | 1982-08-17 |
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