JPS6452091A - Degreased al alloy sheet for coating - Google Patents
Degreased al alloy sheet for coatingInfo
- Publication number
- JPS6452091A JPS6452091A JP20798787A JP20798787A JPS6452091A JP S6452091 A JPS6452091 A JP S6452091A JP 20798787 A JP20798787 A JP 20798787A JP 20798787 A JP20798787 A JP 20798787A JP S6452091 A JPS6452091 A JP S6452091A
- Authority
- JP
- Japan
- Prior art keywords
- alloy sheet
- degreased
- coating
- sodium
- silicate
- 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
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
PURPOSE:To obtain the title degreased Al alloy sheet for coating capable of exhibiting excellent filiform corrosion resistance after coating by controlling the amt. of a silicate remaining on the surface of an alkali-degreased Al alloy sheet for coating to lower than a specified value. CONSTITUTION:An Al alloy sheet for coating is degreased with an alkaline processing soln. not substantially contg. a silicate. A processing soln. contg. about 1-3% of >=1 kind among sodium phosphate, sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, sodium sulfate, and sodium sesquisulfate is preferably used as the processing soln., and the pH is preferably controlled to >=8. By this method, the amt. of the silicate remaining on the surface of the treated Al alloy sheet can be reduced to <=50mg/m<2>, expressed in terms of SiO2. Chemical conversion treatment and electrodeposition are applied to the degreased Al alloy sheet, and a coated sheet having excellent filiform corrosion resistance is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20798787A JPS6452091A (en) | 1987-08-21 | 1987-08-21 | Degreased al alloy sheet for coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20798787A JPS6452091A (en) | 1987-08-21 | 1987-08-21 | Degreased al alloy sheet for coating |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6452091A true JPS6452091A (en) | 1989-02-28 |
JPH0559998B2 JPH0559998B2 (en) | 1993-09-01 |
Family
ID=16548806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20798787A Granted JPS6452091A (en) | 1987-08-21 | 1987-08-21 | Degreased al alloy sheet for coating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6452091A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0533158A (en) * | 1991-10-21 | 1993-02-09 | Nippon Steel Corp | Aluminum sheet excellent in filiform corrosion resistance |
CN104372366A (en) * | 2014-09-30 | 2015-02-25 | 苏州长盛机电有限公司 | Multifunctional metal surface treatment agent and preparation method thereof |
-
1987
- 1987-08-21 JP JP20798787A patent/JPS6452091A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0533158A (en) * | 1991-10-21 | 1993-02-09 | Nippon Steel Corp | Aluminum sheet excellent in filiform corrosion resistance |
CN104372366A (en) * | 2014-09-30 | 2015-02-25 | 苏州长盛机电有限公司 | Multifunctional metal surface treatment agent and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0559998B2 (en) | 1993-09-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |