JPS57126977A - Preparation of chromate treated steel plate - Google Patents
Preparation of chromate treated steel plateInfo
- Publication number
- JPS57126977A JPS57126977A JP1356381A JP1356381A JPS57126977A JP S57126977 A JPS57126977 A JP S57126977A JP 1356381 A JP1356381 A JP 1356381A JP 1356381 A JP1356381 A JP 1356381A JP S57126977 A JPS57126977 A JP S57126977A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- subjected
- carried out
- liquid containing
- plating film
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
Abstract
PURPOSE:To enhance corrosion resistance by a method wherein a steel plate subjected to hot dipping in a Zn bath containing a specific amount of Al and Pb is subjected to chromate treatment by a chromate treating liquid containing a weak acid after cooled at a specific average cooling speed and burning is carried out corresponding to a Pb content of a plating film. CONSTITUTION:A steel plate is subjected to Zn hot dipping in a Zn bath comprising, on the wt% basis, 0.05-0.3 Al, 0.2 or less Pb and the remainder Zn and inevitable impurities. This steel plate is cooled at an average cooling speed of 20 deg.C/sec or more or, directly before a plating film begins solidification, a liquid containing a cooling medium is injected on the plating surface to cool the same. After cooling, the plated steel is subjected to chromate treatment in a chromate treating liquid containing a weak acid and, when a Pb content of the plating film is 0.1% or less, burning is carried out at 95-150 deg.C and, when 0.1% or more, carried out at 70-120 deg.C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1356381A JPS57126977A (en) | 1981-01-30 | 1981-01-30 | Preparation of chromate treated steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1356381A JPS57126977A (en) | 1981-01-30 | 1981-01-30 | Preparation of chromate treated steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57126977A true JPS57126977A (en) | 1982-08-06 |
Family
ID=11836634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1356381A Pending JPS57126977A (en) | 1981-01-30 | 1981-01-30 | Preparation of chromate treated steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57126977A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119608A2 (en) * | 1983-03-16 | 1984-09-26 | Metal Coatings International Inc. | Coating composite for extended corrosion resistance |
| US4497876A (en) * | 1983-03-16 | 1985-02-05 | Kidon William E | Corrosion resistant metal composite with zinc and chromium coating |
-
1981
- 1981-01-30 JP JP1356381A patent/JPS57126977A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119608A2 (en) * | 1983-03-16 | 1984-09-26 | Metal Coatings International Inc. | Coating composite for extended corrosion resistance |
| US4497876A (en) * | 1983-03-16 | 1985-02-05 | Kidon William E | Corrosion resistant metal composite with zinc and chromium coating |
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