JPS55115992A - Production of tin-free steel - Google Patents
Production of tin-free steelInfo
- Publication number
- JPS55115992A JPS55115992A JP2180279A JP2180279A JPS55115992A JP S55115992 A JPS55115992 A JP S55115992A JP 2180279 A JP2180279 A JP 2180279A JP 2180279 A JP2180279 A JP 2180279A JP S55115992 A JPS55115992 A JP S55115992A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- tin
- free steel
- film
- silicofluorides
- 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
Abstract
PURPOSE: To produce the tin-free steel of improved adhesion between films by containing silicofluorides, etc. and phosphoric acid (salt) in the electrolytic chromate treatment bath forming a Cr hydrated oxide film on a metal Cr film and performing cathode electrolytic treatment at high current density.
CONSTITUTION: After the steel strip 1 having been passed through a Cr-plating bath 2, it is washed in a water bath 2 and sent into an electrolytic chromate treating bath 4 to let a Cr hydroated oxide film be formed on the metal film having been formed in the bath 2. In this case, one or more kinds of silicofluorides and borofluorides of molar ratios of 1/4000W1/400 and phosphoric acid or water-soluble phosphate of molar ratios 1/10000W1/100 based on chromic acid are contained in the bath 4. By using this electrolyte, the cathode electrolytic treatment is executed preferably at high current density of 10A/dm2. As a result of this, the tin-free steel having the surface characteristics which obviate the occurrence of peeling despite being subjected to severe bending work is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2180279A JPS55115992A (en) | 1979-02-28 | 1979-02-28 | Production of tin-free steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2180279A JPS55115992A (en) | 1979-02-28 | 1979-02-28 | Production of tin-free steel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55115992A true JPS55115992A (en) | 1980-09-06 |
JPS5745479B2 JPS5745479B2 (en) | 1982-09-28 |
Family
ID=12065181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2180279A Granted JPS55115992A (en) | 1979-02-28 | 1979-02-28 | Production of tin-free steel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115992A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5036223A (en) * | 1973-08-03 | 1975-04-05 |
-
1979
- 1979-02-28 JP JP2180279A patent/JPS55115992A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5036223A (en) * | 1973-08-03 | 1975-04-05 |
Also Published As
Publication number | Publication date |
---|---|
JPS5745479B2 (en) | 1982-09-28 |
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