JPS6436793A - Manufacture of chromated galvanized steel material excellent in surface characteristic - Google Patents
Manufacture of chromated galvanized steel material excellent in surface characteristicInfo
- Publication number
- JPS6436793A JPS6436793A JP19239187A JP19239187A JPS6436793A JP S6436793 A JPS6436793 A JP S6436793A JP 19239187 A JP19239187 A JP 19239187A JP 19239187 A JP19239187 A JP 19239187A JP S6436793 A JPS6436793 A JP S6436793A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- galvanized steel
- manufacture
- chromated
- fluoride
- 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
- Chemical Treatment Of Metals (AREA)
Abstract
PURPOSE:To manufacture a chromated galvanized steel material excellent in adhesive strength, adhesive strength of coated film, etc., by subjecting a galvanized steel material to cathodic electrolytic treatment under specific conditions by the use of a bath containing Cr<6+>, colloidal silica, and fluoride in respectively specified concentrations and then washing the above material with warm water for a specific time. CONSTITUTION:Reducing electrolytic treatment of a galvanized steel material is carried out under the conditions of 1-50A/dm<2> current density and 1-100C/dm<2> quantity of electricity by using a bath containing 2-80g/l of Cr<6+>, 0.5-75g/l, expressed in terms of SiO2 and/or Al2O3, of colloidal silica and/or alumina sol, and 0.05-5g/l, expressed in terms of F<->, of fluoride. Subsequently, the steel material is washed for >=0.5sec with warm water of >=about 50 deg.C and/or a reducing agent-added aqueous solution (0.1-10wt.% of hydrazine is added). By this method, the chromated galvanized steel material having superior surface characteristics, such as corrosion resistance after painting and bare corrosion resistance, can be stably manufactured with superior efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19239187A JPS6436793A (en) | 1987-07-31 | 1987-07-31 | Manufacture of chromated galvanized steel material excellent in surface characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19239187A JPS6436793A (en) | 1987-07-31 | 1987-07-31 | Manufacture of chromated galvanized steel material excellent in surface characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6436793A true JPS6436793A (en) | 1989-02-07 |
Family
ID=16290522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19239187A Pending JPS6436793A (en) | 1987-07-31 | 1987-07-31 | Manufacture of chromated galvanized steel material excellent in surface characteristic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6436793A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0499182A (en) * | 1985-08-28 | 1992-03-31 | Kawasaki Steel Corp | Production of chromated zn plated steel sheet |
| KR101065104B1 (en) * | 2008-10-22 | 2011-09-16 | 엘에스엠트론 주식회사 | Electroplating method capable of lessening consumption of plating additive |
-
1987
- 1987-07-31 JP JP19239187A patent/JPS6436793A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0499182A (en) * | 1985-08-28 | 1992-03-31 | Kawasaki Steel Corp | Production of chromated zn plated steel sheet |
| KR101065104B1 (en) * | 2008-10-22 | 2011-09-16 | 엘에스엠트론 주식회사 | Electroplating method capable of lessening consumption of plating additive |
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