JPS6473070A - Galvanized steel sheet formed by phosphate treatment and vacuum deposition and production thereof - Google Patents
Galvanized steel sheet formed by phosphate treatment and vacuum deposition and production thereofInfo
- Publication number
- JPS6473070A JPS6473070A JP22768387A JP22768387A JPS6473070A JP S6473070 A JPS6473070 A JP S6473070A JP 22768387 A JP22768387 A JP 22768387A JP 22768387 A JP22768387 A JP 22768387A JP S6473070 A JPS6473070 A JP S6473070A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- vacuum deposition
- crystal grains
- phosphate treatment
- plating
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Physical Vapour Deposition (AREA)
Abstract
PURPOSE:To develop a galvanized steel sheet which is formed by a phosphate treatment and vacuum deposition to have excellent corrosion resistance and paintability by changing the orientation and size of Zn crystals and forming steps or grooves between the Zn crystal grains then subjecting the steel sheet to the phosphate treatment at the time of plating Zn by vacuum deposition plating on the surface of the steel sheet. CONSTITUTION:The steel sheet subjected to pretreatments such as degreasing and cleaning is carried into a vacuum deposition plating chamber where the steel sheet is heated to 230-280 deg.C and the vacuum deposition plating layer of Zn is formed on the surface of the steel sheet by the Zn vapor from a Zn hot dipping bath provided below the steel sheet. The plating layer 1 formed on the surface of the steel sheet 4 is constituted of the assemblage of the Zn crystal grains 2 which are hexagonal columnar crystals. The (0001) faces 3 of said crystal grains 2 grow in parallel with the steel sheet 4 and the diameter of the crystal grains 2 is 0.5-20mum; in addition, the steps 5 of at least 0.2-3mum top parts or crystal grain boundary grooves 6 of 0.2-3mum depth are formed between the adjacent crystal grains. A phosphate film 7 is formed to 0.5-5g/m<2> on the surface of such galvanized layer 1 by the phosphate treatment by which the corrosion resistance and coated film adhesiveness of the steel sheet are improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22768387A JPS6473070A (en) | 1987-09-11 | 1987-09-11 | Galvanized steel sheet formed by phosphate treatment and vacuum deposition and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22768387A JPS6473070A (en) | 1987-09-11 | 1987-09-11 | Galvanized steel sheet formed by phosphate treatment and vacuum deposition and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6473070A true JPS6473070A (en) | 1989-03-17 |
Family
ID=16864697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22768387A Pending JPS6473070A (en) | 1987-09-11 | 1987-09-11 | Galvanized steel sheet formed by phosphate treatment and vacuum deposition and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6473070A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021121343A1 (en) | 2021-08-17 | 2023-02-23 | Thyssenkrupp Steel Europe Ag | Steel flat product with improved zinc coating |
-
1987
- 1987-09-11 JP JP22768387A patent/JPS6473070A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021121343A1 (en) | 2021-08-17 | 2023-02-23 | Thyssenkrupp Steel Europe Ag | Steel flat product with improved zinc coating |
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