JPS556448A - Coloring method of anodic oxidation film - Google Patents
Coloring method of anodic oxidation filmInfo
- Publication number
- JPS556448A JPS556448A JP7775778A JP7775778A JPS556448A JP S556448 A JPS556448 A JP S556448A JP 7775778 A JP7775778 A JP 7775778A JP 7775778 A JP7775778 A JP 7775778A JP S556448 A JPS556448 A JP S556448A
- Authority
- JP
- Japan
- Prior art keywords
- electrolysis
- anodic oxidation
- oxidation film
- molybdate
- treatment
- 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
Abstract
PURPOSE: To well color anodic oxidation film to a blue color by subjecting the anodic oxidation film of an aluminum base material to secondary electrolyis treatment in an aqueous molybdate solution.
CONSTITUTION: Al or Al alloy is subjected to anodic oxidation electrolysis treatment to be formed with an anodic oxidation film of a desired thickness. Next, this is subjected to secondary electrolysis treatment in an aqueous acidic solution of molybdate [(NH4)2MoO4, Na2MoO4, etc.]. This electrolysis may be any of AC, DC and AC-DC superposition but in the case of DC, the anode film is made cathode. Electrolysis conditions are made about 0.01 to 1A/dm2 of current density in the case of, e.g., constant current electrolysis and about 2 to 30V in constant voltage electrolysis. Concentrations of the molybdate in the electrolyte are about 1 to 100g/l as Mo and addition of small amounts of one or two or more kinds of boric acid, borate and/or metal salts such as of iron, tin, zinc, etc. besides this is desirable. Thus, the molybdic acid is reduced and colored in the fine pores of alumite, whereby coloring is effected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7775778A JPS556448A (en) | 1978-06-27 | 1978-06-27 | Coloring method of anodic oxidation film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7775778A JPS556448A (en) | 1978-06-27 | 1978-06-27 | Coloring method of anodic oxidation film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS556448A true JPS556448A (en) | 1980-01-17 |
JPS5643393B2 JPS5643393B2 (en) | 1981-10-12 |
Family
ID=13642791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7775778A Granted JPS556448A (en) | 1978-06-27 | 1978-06-27 | Coloring method of anodic oxidation film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS556448A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4756772A (en) * | 1983-10-31 | 1988-07-12 | Alcan International Limited | Method of coloring a porous anodic oxide film on the surface of an aluminum article |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05115251A (en) * | 1991-10-24 | 1993-05-14 | Seijitsumura:Kk | Method for producing devil's tongue with gusset and device for producing the same |
-
1978
- 1978-06-27 JP JP7775778A patent/JPS556448A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4756772A (en) * | 1983-10-31 | 1988-07-12 | Alcan International Limited | Method of coloring a porous anodic oxide film on the surface of an aluminum article |
Also Published As
Publication number | Publication date |
---|---|
JPS5643393B2 (en) | 1981-10-12 |
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