JPS5483638A - Chromium plating method for cylinder of cast aluminum alloy - Google Patents
Chromium plating method for cylinder of cast aluminum alloyInfo
- Publication number
- JPS5483638A JPS5483638A JP15225577A JP15225577A JPS5483638A JP S5483638 A JPS5483638 A JP S5483638A JP 15225577 A JP15225577 A JP 15225577A JP 15225577 A JP15225577 A JP 15225577A JP S5483638 A JPS5483638 A JP S5483638A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- pretreatment
- alloy
- double
- layer
- 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
- Pistons, Piston Rings, And Cylinders (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
PURPOSE: To enhance the adherence of Cr to a cylinder of cast Al alloy by finishing the inside of the cylinder by mechanical working; carrying out double chemical etching and double zincating as pretreatment; plating the pretreated inside with Cr in a short time; supplying the inverse current to strip the Cr and carrying out pretreatment again prior to regular Cr plating.
CONSTITUTION: The inside of a cylinder of cast Al alloy is finished by fine boring and subjected to double chemical etching and double zincating as pretreatment. After forming a thin Cr plated layer, the inverse current is supplied to strip the layer, providing unevenness of a complex Rias coast-like section to the base metal surface. The above pretreatment is carried out again, and regular Cr plated layer 2' is formed on Al alloy layer 1'. Thus, the unevenness is filled with the Cr plated layer, and a strong anchoring effect is produced, thereby resulting in high adherence.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15225577A JPS5483638A (en) | 1977-12-16 | 1977-12-16 | Chromium plating method for cylinder of cast aluminum alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15225577A JPS5483638A (en) | 1977-12-16 | 1977-12-16 | Chromium plating method for cylinder of cast aluminum alloy |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5483638A true JPS5483638A (en) | 1979-07-03 |
JPS579637B2 JPS579637B2 (en) | 1982-02-22 |
Family
ID=15536473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15225577A Granted JPS5483638A (en) | 1977-12-16 | 1977-12-16 | Chromium plating method for cylinder of cast aluminum alloy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5483638A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0849379A3 (en) * | 1996-12-20 | 1998-08-12 | PLASTAL - ZCP S.p.A. | Improvement in the surface finishing method for aesthetical component parts of transportation means |
-
1977
- 1977-12-16 JP JP15225577A patent/JPS5483638A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0849379A3 (en) * | 1996-12-20 | 1998-08-12 | PLASTAL - ZCP S.p.A. | Improvement in the surface finishing method for aesthetical component parts of transportation means |
Also Published As
Publication number | Publication date |
---|---|
JPS579637B2 (en) | 1982-02-22 |
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