JPS5757893A - Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging - Google Patents
Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to agingInfo
- Publication number
- JPS5757893A JPS5757893A JP13172180A JP13172180A JPS5757893A JP S5757893 A JPS5757893 A JP S5757893A JP 13172180 A JP13172180 A JP 13172180A JP 13172180 A JP13172180 A JP 13172180A JP S5757893 A JPS5757893 A JP S5757893A
- Authority
- JP
- Japan
- Prior art keywords
- chromate
- steel plate
- aging
- bonding strength
- strength due
- 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
Landscapes
- Electrochemical Coating By Surface Reaction (AREA)
Abstract
PURPOSE: To minimize the deterioration in the bonding strength due to aging by combinedly carrying out cathodic electrolysis in an aqueous soln. of chromate or dichromate and treatment with hot water.
CONSTITUTION: Electrolytic chromate treatment is carried out using a steel plate as a cathode in an aqueous soln. of chromic anhydride, chromate or dichromate to obtain an electrolytically chromate treated steel plate having a chromate coat as at least its surface layer. The amount of the chromate coat of this steel plate is regulated to 5W50mg/m2 in an electrolytic chromate treatment bath, and the plate is washed as required. Cathodic electrolysis is then carried out with ≥2.5C/dm3 electricity in an aqueous soln. of chromate or dichromate contg. F- in 1/≤40 ratio of F-/Cr+6 and no free chromic acid. Finally, the plate is treated with hot water at 60W100°C and ≥4pH for 0.3W10sec.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13172180A JPS5757893A (en) | 1980-09-24 | 1980-09-24 | Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13172180A JPS5757893A (en) | 1980-09-24 | 1980-09-24 | Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5757893A true JPS5757893A (en) | 1982-04-07 |
Family
ID=15064642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13172180A Pending JPS5757893A (en) | 1980-09-24 | 1980-09-24 | Manufacture of electrolytically chromate treated steel plate causing less deterioration in bonding strength due to aging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5757893A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219194A (en) * | 1988-02-27 | 1989-09-01 | Nkk Corp | Pretreatment of electrolytically chromated steel sheet |
| JPH02111899A (en) * | 1988-10-19 | 1990-04-24 | Toyo Kohan Co Ltd | Production of electrolytically chromated steel sheet having excellent weldability |
| JP2007175195A (en) * | 2005-12-27 | 2007-07-12 | Heiwa Corp | Game machine |
-
1980
- 1980-09-24 JP JP13172180A patent/JPS5757893A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01219194A (en) * | 1988-02-27 | 1989-09-01 | Nkk Corp | Pretreatment of electrolytically chromated steel sheet |
| JPH02111899A (en) * | 1988-10-19 | 1990-04-24 | Toyo Kohan Co Ltd | Production of electrolytically chromated steel sheet having excellent weldability |
| JPH0527720B2 (en) * | 1988-10-19 | 1993-04-22 | Toyo Kohan Co Ltd | |
| JP2007175195A (en) * | 2005-12-27 | 2007-07-12 | Heiwa Corp | Game machine |
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