JPS5785988A - Electroplating method for inside of steel pipe with zinc - Google Patents
Electroplating method for inside of steel pipe with zincInfo
- Publication number
- JPS5785988A JPS5785988A JP15939280A JP15939280A JPS5785988A JP S5785988 A JPS5785988 A JP S5785988A JP 15939280 A JP15939280 A JP 15939280A JP 15939280 A JP15939280 A JP 15939280A JP S5785988 A JPS5785988 A JP S5785988A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- zinc
- slightly soluble
- soln
- anode
- 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.)
- Pending
Links
Abstract
PURPOSE: To electroplate the inside of a cylindrical iron pipe with zinc uniformly and efficiently by setting a slightly soluble zinc anode at the internal center of the pipe, pouring a plating soln. in the pipe as a cathode, and carrying out electrolysis.
CONSTITUTION: A rodlike anode of slightly soluble zinc with little chemical solubility is fixed at the internal center of a cylindrical iron pipe as a cathode, and the bottom of the pipe is sealed. A plating soln. such as a mixed soln. of NaCN and ZnO is poured in the pipe, and electrolysis is carried out to form a zinc electroplated film having a uniform thickness on the whole inner wall of the pipe. Since the anode is chemically slightly soluble, it undergoes little change in the diameter, the concn. of the plating soln. is stabilized, and the distribution of electric current in the soln. is made uniform. Thus, electroplating is conducted very smoothly. A composition consisting of zinc and a little Mg is used as a slightly soluble zinc composition.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15939280A JPS5785988A (en) | 1980-11-14 | 1980-11-14 | Electroplating method for inside of steel pipe with zinc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15939280A JPS5785988A (en) | 1980-11-14 | 1980-11-14 | Electroplating method for inside of steel pipe with zinc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5785988A true JPS5785988A (en) | 1982-05-28 |
Family
ID=15692775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15939280A Pending JPS5785988A (en) | 1980-11-14 | 1980-11-14 | Electroplating method for inside of steel pipe with zinc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5785988A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102995084A (en) * | 2012-11-26 | 2013-03-27 | 宁波市江北名正电机有限公司 | Closed galvanizing method for stamping two ends of steel pipe |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54121240A (en) * | 1978-03-14 | 1979-09-20 | Toshiba Corp | Internal surface plating of elongated metal pipe |
-
1980
- 1980-11-14 JP JP15939280A patent/JPS5785988A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54121240A (en) * | 1978-03-14 | 1979-09-20 | Toshiba Corp | Internal surface plating of elongated metal pipe |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102995084A (en) * | 2012-11-26 | 2013-03-27 | 宁波市江北名正电机有限公司 | Closed galvanizing method for stamping two ends of steel pipe |
CN102995084B (en) * | 2012-11-26 | 2016-01-20 | 宁波市江北名正电机有限公司 | Galvanized method is closed in the punching press of steel pipe two |
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