JPS57152469A - Surface treatment of al alloy for providing superior pitting corrosion resistance - Google Patents
Surface treatment of al alloy for providing superior pitting corrosion resistanceInfo
- Publication number
- JPS57152469A JPS57152469A JP3749281A JP3749281A JPS57152469A JP S57152469 A JPS57152469 A JP S57152469A JP 3749281 A JP3749281 A JP 3749281A JP 3749281 A JP3749281 A JP 3749281A JP S57152469 A JPS57152469 A JP S57152469A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- pitting corrosion
- corrosion resistance
- surface treatment
- providing superior
- 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
- Chemical Treatment Of Metals (AREA)
- ing And Chemical Polishing (AREA)
Abstract
PURPOSE: To provide superior pitting corrosion resistance to the surface of an Al alloy contg. Zn by simple operation by immersing the alloy in an aqueous NaOH soln. under specified conditions to carry out etching.
CONSTITUTION: An Al alloy contg. 0.1W1.0wt% Zn is immersed in an aqueous NaOH soln. with 3W20% concn. at ordinary temp. W80°C for 1secW10min to carry out etching. By this treatment an ununiform oxide film on the alloy surface is removed easily and thoroughly. An oxide film formed on the alloy surface after the etching is relatively weak and wholly uniform. Accordingly, the form of the surface corrosion of the Al alloy contg. Zn is perfectly changed to general corrosion type, and the occurrence of pitting corrosion is almost prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3749281A JPS57152469A (en) | 1981-03-16 | 1981-03-16 | Surface treatment of al alloy for providing superior pitting corrosion resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3749281A JPS57152469A (en) | 1981-03-16 | 1981-03-16 | Surface treatment of al alloy for providing superior pitting corrosion resistance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57152469A true JPS57152469A (en) | 1982-09-20 |
JPH0312153B2 JPH0312153B2 (en) | 1991-02-19 |
Family
ID=12499015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3749281A Granted JPS57152469A (en) | 1981-03-16 | 1981-03-16 | Surface treatment of al alloy for providing superior pitting corrosion resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57152469A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013204062A (en) * | 2012-03-27 | 2013-10-07 | Lixil Corp | Aluminum extrusion and surface treatment method for the same |
-
1981
- 1981-03-16 JP JP3749281A patent/JPS57152469A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013204062A (en) * | 2012-03-27 | 2013-10-07 | Lixil Corp | Aluminum extrusion and surface treatment method for the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0312153B2 (en) | 1991-02-19 |
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