JPS55148773A - Surface treatment of zinc or zinc alloy product - Google Patents
Surface treatment of zinc or zinc alloy productInfo
- Publication number
- JPS55148773A JPS55148773A JP5547579A JP5547579A JPS55148773A JP S55148773 A JPS55148773 A JP S55148773A JP 5547579 A JP5547579 A JP 5547579A JP 5547579 A JP5547579 A JP 5547579A JP S55148773 A JPS55148773 A JP S55148773A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- soln
- aqueous
- plate
- coating
- 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
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
PURPOSE: To form a protective coating excellent in corrosion resistance, surface appearance, adhesion of coating on the surface of zinc plate or galvanized plate, by treating the zinc plate etc. with aqueous alkali soln., then with aqueous tannin or tannic acid soln. of low concn.
CONSTITUTION: Zinc plate, galvanized plate, or zinc die-cast product is treated with an aqueous soln. contg. one or more members selected from the group consisting of hydroxide, silicate, phosphate, or borate of alkali metals, of a pH not lower than 12.5, in order to activate the surface of the zinc. Then the product is treated by immersing it in an aqueous soln. of 40W60°C contg. as a principal component 1W5g/l tannin or tannic acid for 5W60sec. After the treatment, it is taken out of the soln. and is dried. Hereby a protective coating having corrosion resistance equal to that obtained by chromate method, nearly colorless and transparent, excellent in appearance, and adhesion of coating is formed without causing environmental pollution, thereby making waste water treatment useless.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5547579A JPS55148773A (en) | 1979-05-07 | 1979-05-07 | Surface treatment of zinc or zinc alloy product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5547579A JPS55148773A (en) | 1979-05-07 | 1979-05-07 | Surface treatment of zinc or zinc alloy product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55148773A true JPS55148773A (en) | 1980-11-19 |
| JPS6133910B2 JPS6133910B2 (en) | 1986-08-05 |
Family
ID=12999624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5547579A Granted JPS55148773A (en) | 1979-05-07 | 1979-05-07 | Surface treatment of zinc or zinc alloy product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55148773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003027354A1 (en) * | 2001-09-19 | 2003-04-03 | Nippon Steel Corporation | Precoated metal sheet with excellent press formability and process for producing the same |
-
1979
- 1979-05-07 JP JP5547579A patent/JPS55148773A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003027354A1 (en) * | 2001-09-19 | 2003-04-03 | Nippon Steel Corporation | Precoated metal sheet with excellent press formability and process for producing the same |
| CN1304639C (en) * | 2001-09-19 | 2007-03-14 | 新日本制铁株式会社 | Precoated metal sheet superior in press formability, and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6133910B2 (en) | 1986-08-05 |
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