JPS57203796A - Surface treatment of zinc plated steel plate - Google Patents
Surface treatment of zinc plated steel plateInfo
- Publication number
- JPS57203796A JPS57203796A JP8691481A JP8691481A JPS57203796A JP S57203796 A JPS57203796 A JP S57203796A JP 8691481 A JP8691481 A JP 8691481A JP 8691481 A JP8691481 A JP 8691481A JP S57203796 A JPS57203796 A JP S57203796A
- Authority
- JP
- Japan
- Prior art keywords
- chromic acid
- steel plate
- reduction
- terms
- product
- 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 improve the corrosion resistance in the worked part of a zinc plated steel plate with a simple stage by subjecting said steel plate to a chromate treatment contg. the product of reduction of chromic acid and coating the paint curable by active energy rays on the top layer thereof.
CONSTITUTION: An aq. chromic acid soln. consisting of the compsn. of mixing ratios between chromic acid and the product of reduction of chromic acid ranging 1:0.5W1:0.8 by weight in terms of CrO3 respectively is coated on a steel plate plated with zinc or a zinc alloy, whereby a chromate film of 10W200mg/m2 stuck amount in total chromium is formed. Paint to be cured by active energy rays such as accelerated electron rays, ionizable radiations or the like is coated on the top layer thereof to 0.5W10μ film thicknesses. Silica sol is added at a weight ratio of silica sol (in terms of SiO2) based on the total weight (in terms of CrO3) of the chromic acid and the product of reduction of chromic acid ranging 1:0.3W1:8.0 to said aq. chromic acid soln., whereby the irregularity in sticking of chromate is prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086914A JPS5930788B2 (en) | 1981-06-08 | 1981-06-08 | Surface treatment method for galvanized steel sheets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086914A JPS5930788B2 (en) | 1981-06-08 | 1981-06-08 | Surface treatment method for galvanized steel sheets |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57203796A true JPS57203796A (en) | 1982-12-14 |
JPS5930788B2 JPS5930788B2 (en) | 1984-07-28 |
Family
ID=13900108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56086914A Expired JPS5930788B2 (en) | 1981-06-08 | 1981-06-08 | Surface treatment method for galvanized steel sheets |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5930788B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61585A (en) * | 1984-06-13 | 1986-01-06 | Kawasaki Steel Corp | Manufacture of chromated galvanized steel sheet having superior corrosion resistance |
JPH05171456A (en) * | 1991-11-21 | 1993-07-09 | Sumitomo Metal Ind Ltd | Steel sheet for exterior of automobile excellent in chipping resistance |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49134540A (en) * | 1973-05-02 | 1974-12-25 | ||
JPS509545A (en) * | 1973-05-31 | 1975-01-31 | ||
JPS5268036A (en) * | 1975-12-04 | 1977-06-06 | Nisshin Steel Co Ltd | Process for surface treating steel sheet by phosphoric acidd0chromic acid bath |
JPS52129787A (en) * | 1976-04-26 | 1977-10-31 | Nippon Kokan Kk <Nkk> | Highly anticorrosive steel sheet |
JPS54161549A (en) * | 1978-06-13 | 1979-12-21 | Nippon Steel Corp | Chromate treatment method for zinc-coated steel product |
-
1981
- 1981-06-08 JP JP56086914A patent/JPS5930788B2/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49134540A (en) * | 1973-05-02 | 1974-12-25 | ||
JPS509545A (en) * | 1973-05-31 | 1975-01-31 | ||
JPS5268036A (en) * | 1975-12-04 | 1977-06-06 | Nisshin Steel Co Ltd | Process for surface treating steel sheet by phosphoric acidd0chromic acid bath |
JPS52129787A (en) * | 1976-04-26 | 1977-10-31 | Nippon Kokan Kk <Nkk> | Highly anticorrosive steel sheet |
JPS54161549A (en) * | 1978-06-13 | 1979-12-21 | Nippon Steel Corp | Chromate treatment method for zinc-coated steel product |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61585A (en) * | 1984-06-13 | 1986-01-06 | Kawasaki Steel Corp | Manufacture of chromated galvanized steel sheet having superior corrosion resistance |
JPH05171456A (en) * | 1991-11-21 | 1993-07-09 | Sumitomo Metal Ind Ltd | Steel sheet for exterior of automobile excellent in chipping resistance |
Also Published As
Publication number | Publication date |
---|---|
JPS5930788B2 (en) | 1984-07-28 |
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