JPS5569294A - Secondary electrolytic coloring method of aluminum and alloy thereof - Google Patents
Secondary electrolytic coloring method of aluminum and alloy thereofInfo
- Publication number
- JPS5569294A JPS5569294A JP13392179A JP13392179A JPS5569294A JP S5569294 A JPS5569294 A JP S5569294A JP 13392179 A JP13392179 A JP 13392179A JP 13392179 A JP13392179 A JP 13392179A JP S5569294 A JPS5569294 A JP S5569294A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- electrolytic bath
- colored film
- primary treatment
- 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 form a colored film rich in luster and excelling in appearance in a short time, by performing anodic oxidation of Al (alloy) in an electrolytic bath for primary treatment obtained by mixing H2O2 and polyphosphate in NaOH solution, and performing AC electrolysis in an electrolytic bath for secondary treatment to dissolve metal salt.
CONSTITUTION: Al (alloy) is subjected to anodic oxidation in an electrolytic bath for primary treatment obtained by mixing H2O2 (usually in the range of 1W4vol%) and polyphosphate (such as sodium pyrophosphate) in NaOH solution. This Al (alloy) is then subjected to AC electrolysis in an electrolytic bath for secondary treatment to dissolve metal salt such as sulfates and hydrochlorides of Ni, Su, co. In this method, aging of the electrolytic bath for primary treatment may be retarded, so that the bath can be used for a longer period of time. Besides, the obtained colored film has a uniform luster and is not discolored even if exposed to ultraviolet rays for 200hr. Hence, the colored film may be used in decorative items, electric household appliances, and interior and exterior furnishing meterials of building.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13392179A JPS5569294A (en) | 1979-10-16 | 1979-10-16 | Secondary electrolytic coloring method of aluminum and alloy thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13392179A JPS5569294A (en) | 1979-10-16 | 1979-10-16 | Secondary electrolytic coloring method of aluminum and alloy thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6894976A Division JPS52150751A (en) | 1976-06-11 | 1976-06-11 | Secondary electrolytic pigmentation process for aluminum and aluminum alloy |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5569294A true JPS5569294A (en) | 1980-05-24 |
JPS5641716B2 JPS5641716B2 (en) | 1981-09-30 |
Family
ID=15116193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13392179A Granted JPS5569294A (en) | 1979-10-16 | 1979-10-16 | Secondary electrolytic coloring method of aluminum and alloy thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5569294A (en) |
-
1979
- 1979-10-16 JP JP13392179A patent/JPS5569294A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5641716B2 (en) | 1981-09-30 |
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