CN113025939B - Zinc-aluminum-magnesium coated steel and preparation method thereof - Google Patents
Zinc-aluminum-magnesium coated steel and preparation method thereof Download PDFInfo
- Publication number
- CN113025939B CN113025939B CN202110212169.3A CN202110212169A CN113025939B CN 113025939 B CN113025939 B CN 113025939B CN 202110212169 A CN202110212169 A CN 202110212169A CN 113025939 B CN113025939 B CN 113025939B
- Authority
- CN
- China
- Prior art keywords
- zinc
- aluminum
- magnesium
- cooling
- equal
- 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.)
- Active
Links
Images
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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Abstract
The invention provides zinc-aluminum-magnesium coated steel and a preparation method thereof, wherein a zinc-aluminum-magnesium coating of the zinc-aluminum-magnesium coated steel comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities; the grain size of the zinc-aluminum-magnesium coating is less than or equal to 300 mu m. The zinc-aluminum-magnesium coated steel provided by the invention has the brightness variation of 1.9-2.7, strong blackening resistance and weight loss of 0.28-3.91g/m per unit area2Good corrosion resistance and bonding strength of 25-31.1g/m2The shear failure mode is usually SCF, and the bonding strength is high.
Description
Technical Field
The invention relates to the technical field of zinc-aluminum-magnesium coated steel preparation, in particular to zinc-aluminum-magnesium coated steel and a preparation method thereof.
Background
The zinc-aluminum-magnesium coated steel is hot-dip galvanized steel, and the hot-dip galvanized steel is formed by putting a steel substrate into molten zinc liquid containing zinc-aluminum-magnesium elements, so that molten zinc and alloy thereof react with the steel substrate, and a steel plate with a firm metallurgical bonding coating is formed. The zinc-aluminum-magnesium-coated steel has the advantages of strong coating binding force, good corrosion resistance, long service life, simple manufacturing process, low product price and the like, and the demand of the zinc-aluminum-magnesium-coated steel in various industries such as automobile industry, electrical appliance industry and building industry is increasing day by day. Most importantly, the zinc-aluminum-magnesium plated steel has better corrosion resistance than the traditional pure zinc-plated steel plate, and according to research, the corrosion resistance of the zinc-aluminum-magnesium plated layer is more than 4 times that of the hot-galvanized plated layer, but the zinc-aluminum-magnesium plated layer has more problems in use. The most important problem is that the coating has a blackened surface during use, which reduces the surface quality and affects the application.
Disclosure of Invention
The invention provides zinc-aluminum-magnesium coated steel and a preparation method thereof, aiming at solving the technical problem that a coating on the surface of the zinc-aluminum-magnesium coated steel becomes black.
On one hand, the invention provides zinc-aluminum-magnesium coated steel, wherein a zinc-aluminum-magnesium coating of the zinc-aluminum-magnesium coated steel comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
the grain size of the zinc-aluminum-magnesium coating is less than or equal to 300 mu m.
Further, the sum of the mass fractions of the Mg and the Al is less than or equal to 15 percent.
Furthermore, the volume ratio of the hydroxide in the zinc-aluminum-magnesium coating is more than or equal to 80%.
Furthermore, the thickness of the steel substrate of the zinc-aluminum-magnesium coating steel is 0.5-6.0mm, and the thickness of the zinc-aluminum-magnesium coating steel is 5-40 mu m.
On the other hand, the invention also provides a preparation method of the zinc-aluminum-magnesium coated steel, which comprises the following steps,
obtaining the plating solution with the temperature of 400-500 ℃; the plating solution comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
immersing the steel plate with the temperature of 450-500 ℃ into the plating solution for galvanizing to obtain the steel plate with a plating layer;
and cooling the steel plate with the coating to obtain the zinc-aluminum-magnesium coated steel.
Further, the cooling includes a first cooling, the first cooling is gas cooling, the first cooling rate is not less than 10k/s, the first cooling start temperature is 400-.
Further, the gas used for gas cooling is any at least one of the following: air, nitrogen, argon, carbon dioxide.
Further, in the first cooling process, performing second cooling on the steel plate with the coating, wherein the second cooling is water mist cooling, the second cooling starting temperature is 350-.
Furthermore, the size of the water mist drops used for water mist cooling is less than or equal to 0.1 mm.
Further, in the water mist cooling, the quality of the water mist on the surface of the steel plate with the coating is more than or equal to 1g/m2。
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a zinc-aluminum-magnesium coated steel and a preparation method thereof, wherein the coating in the zinc-aluminum-magnesium coated steel contains Al and Mg elements, so that the zinc-aluminum-magnesium coated steel hasGood corrosion resistance; meanwhile, the grain size of the plating layer is controlled to reduce the curvature radius of the grain surface, increase the curvature and reduce the stability of an oxide film, thereby improving the blackening resistance of the zinc-aluminum-magnesium plating layer. The zinc-aluminum-magnesium coated steel provided by the invention has the brightness variation of 1.9-2.7, strong blackening resistance and weight loss of 0.28-3.91g/m per unit area2Good corrosion resistance and bonding strength of 25-31.1g/m2The shear failure mode is usually SCF, and the bonding strength is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of the microstructure of different grain sizes of Zn-Al-Mg coated steel.
FIG. 2 is a schematic view showing the microscopic composition of a Zn-Al-Mg-plated steel.
In fig. 1, the left diagram is a structural diagram of a small-sized die, and the right diagram is a structural diagram of a large-sized die.
In FIG. 2, 1-hydroxide, 2-oxide.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
on one hand, the invention provides zinc-aluminum-magnesium coated steel, wherein a zinc-aluminum-magnesium coating of the zinc-aluminum-magnesium coated steel comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
the grain size of the zinc-aluminum-magnesium coating is less than or equal to 300 mu m.
In the invention, the magnesium element and the aluminum element are used for improving the corrosion resistance of the zinc-aluminum-magnesium coating; the main reason why the surface of the zinc-aluminum-magnesium coating becomes black is that Al element and Mg element in the coating are oxidized in the air to form complex oxides, and the refractive index of the oxides in the air is large, so that light is refracted and absorbed in the oxides, and the surface of the zinc-aluminum-magnesium coating becomes grey black. The oxidation of the alloying elements Al and Mg preferentially occurs in the crystal grains, because the curvature radius of the interior of the crystal grains is larger and smaller, the interfacial tension to the surface oxide film is small, and a stable oxide film is easy to form, and because the curvature radius of the crystal boundary position is small and the curvature is large, the stable oxide film is difficult to form. Research shows that the size of the crystal grains and the surface curvature have approximate linear positive correlation. Therefore, the invention provides that the grain size is not more than 300 microns, the grain size is reduced as much as possible, the curvature radius of the surface of the grain is reduced, the curvature is increased, and the stability of an oxide film is reduced, as shown in figure 1, so that the blackening resistance of the zinc-aluminum-magnesium coating is improved.
As an implementation manner of the embodiment of the invention, the sum of the mass fractions of the Mg and the Al is less than or equal to 15 percent.
If the Mg and Al contents in the zinc-aluminum-magnesium coating are too high, the aluminum and the magnesium react with oxygen in the air to form an excessively thick oxide film, so that the surface of the zinc-aluminum-magnesium coating steel is obviously blackened; and most of the oxide film is nonpolar molecules, the adhesive is polar molecules, and the defect dispersion force exists between the oxide film and the adhesive, so that the compatibility between the oxide film and the adhesive is poor, the adhesive property is reduced, and the sum of the mass fractions of Mg and Al is controlled to be less than or equal to 15%.
As an implementation mode of the embodiment of the invention, the volume proportion of the hydroxide in the zinc-aluminum-magnesium coating is more than or equal to 80%.
Because Al and Mg are relatively active elements, Al and Mg are difficult to keep stable in the air and can react to form compounds. However, in many compounds, the refractive index of the hydroxide is the smallest, the reflectivity of the formed film is the largest, and the gray color is easy to appear, so that the zinc-aluminum-magnesium coated steel has good blackening resistance. The main reason for the poor adhesion compatibility of the zinc-aluminum-magnesium coating is that complex oxides are formed on the surface, and the oxides occupy the surface of crystal grains, so that polar bonds in the adhesive cannot be bonded with the surface of the coating. In the present invention, among many compounds, the hydroxide and the hydroxyl group in the adhesive can form a stable bonding relationship, and the adhesive compatibility is good. Therefore, the invention requires that the proportion of hydroxide in the compound is not less than 80%, as shown in FIG. 2.
In one embodiment of the present invention, the thickness of the steel substrate of the zinc-aluminum-magnesium plated steel is 0.5 to 6mm, and the thickness of the zinc-aluminum-magnesium plated layer of the zinc-aluminum-magnesium plated steel is 5 to 40 μm.
On the other hand, the embodiment of the invention also provides a preparation method of the zinc-aluminum-magnesium coated steel, which comprises the following steps,
s1, obtaining the plating solution with the temperature of 400-; the plating solution comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
in practice, a plating solution with a temperature of 400-500 ℃ can be obtained by heating means.
The temperature of the plating solution is controlled at 400-500 ℃ so as to control the grain size of the zinc-aluminum-magnesium plating layer; if the temperature of the plating solution is too high, the plating layer can grow rapidly in the solidification process, so that larger grains appear; if the temperature of the plating solution is too low, the zinc-aluminum-magnesium plating layer is too fast solidified, and the surface has solidification shrinkage cracks and uneven flow textures, thereby affecting the corrosion resistance of the plating layer.
S2, immersing the steel plate with the temperature of 450-500 ℃ into the plating solution for galvanization to obtain the steel plate with a plating layer;
after the steel plate is immersed in the plating solution, the alloy elements in the plating solution and the steel plate can rapidly react to form an intermediate layer between the steel plate and the plating layer. The chemical reaction between the plating layer and the steel plate is greatly influenced by the temperature of the steel plate, if the temperature of the steel plate is too high, the chemical reaction speed is too high, and the middle layer is relatively loose and not compact, so that the adhesion of the plating layer on the surface of the steel plate is poor, and the thickness of the plating layer is not uniform; if the temperature of the steel sheet is too low, the chemical reaction is not sufficiently progressed, resulting in discontinuous growth of the intermediate layer and also poor adhesion of the plating layer to the steel sheet.
And S3, cooling the steel plate with the coating to obtain the zinc-aluminum-magnesium coating steel.
As an implementation manner of the embodiment of the invention, the cooling includes a first cooling, the first cooling is gas cooling, the first cooling rate is greater than or equal to 10k/s, the first cooling start temperature is 400-.
After the steel plate with the coating is obtained, the zinc-aluminum-magnesium coating is subjected to solid-phase reaction from 400 ℃ to form a solid phase, so that the cooling speed in the coating solidification process needs to be ensured to be high, crystal grains are refined, and the cooling speed is not less than 10K/s. The cooling rate is too low, which causes coarse grains in the coating and thus black defects
As an implementation of the embodiment of the present invention, the gas used for cooling the gas includes, but is not limited to, at least one of the following: air, nitrogen, argon, carbon dioxide.
Pure oxygen, water vapor and the like cannot be adopted in gas cooling, the gas has too strong oxidizing property, a thick oxidizing layer can be formed on the surface of the zinc-aluminum-magnesium coating, and the refractive index of the thick oxidizing layer in the air is larger, so that light rays are refracted and absorbed in the oxide, and the surface is gray black.
As an implementation manner of the embodiment of the present invention, in the first cooling process, the second cooling is performed on the steel plate with the coating, the second cooling is water mist cooling, the second cooling start temperature is 350-.
The main purpose of mist cooling is to promote the formation of hydroxides on the surface of the coating, while also increasing the cooling rate. After the water mist is contacted with the strip steel coating, fine mist drops can quickly react with the zinc-aluminum-magnesium coating on the surface of the strip steel to form hydroxyl, the hydroxyl reacts with an oxide on the surface of the coating to form hydroxide, the hydroxide and the hydroxyl in the adhesive can form a stable bonding relation, and the bonding compatibility is good. The formation of hydroxides requires a temperature which is too low to form and therefore the cooling temperature cannot be lower than 300 ℃. However, if the temperature is too high, the mist is liable to form a large amount of active oxygen ions which cause oxidation of the surface of the plating layer to deteriorate blackening resistance and adhesion properties, so that the temperature for cooling the mist cannot exceed 360 ℃.
As an implementation mode of the embodiment of the invention, the size of the water mist drops used for cooling the water mist is less than or equal to 0.1 mm.
If the size of the water mist drops is too large, the reaction time of the water mist drops and the zinc-aluminum-magnesium coating is obviously prolonged, and hydroxide is not formed favorably.
As an implementation mode of the embodiment of the invention, in the water mist cooling, the quality of the water mist on the surface of the steel plate with the coating is more than or equal to 1g/m2. When the water mist is cooled, the quality of the water mist on the surface of the steel plate with the coating is too low, and enough hydroxide cannot be formed, so that the blackening resistance and the adhesive property of the zinc-aluminum-magnesium coating steel are influenced.
Hereinafter, a zinc-aluminum-magnesium plated steel and a method for manufacturing the same according to the present invention will be described in detail with reference to examples, comparative examples, and experimental data.
Examples 1 to 8 and comparative examples 1 to 9
Examples 1 to 8 and comparative examples 1 to 9 provide zinc-aluminum-magnesium coated steels and a method for producing the same, in which the coating characteristics of the obtained zinc-aluminum-magnesium coated steels are shown in table 1, and the balance is Zn and inevitable impurities. The preparation method comprises the following steps: and (3) immersing the heated steel plate into a preheated plating solution for galvanizing, then carrying out gas cooling, and carrying out water mist cooling on the galvanized steel plate in the gas cooling process to obtain the zinc-aluminum-magnesium plated steel. The specific preparation method is shown in table 2.
The grain sizes of the zinc-aluminum-magnesium plated steel were counted for the examples 1 to 8 and the comparative examples 1 to 9, and the corrosion resistance test, the blackening resistance test and the adhesion test were performed. The test method specifically comprises the following steps:
the grain size of the plating layer: the EBSD technology is adopted to count the size of each crystal grain on the surface of the plating layer, the maximum equivalent diameter of all the crystal grains is calculated as the crystal grain size, and at least 10 fields of view are collected on each sample.
Identifying compounds on the surface of the plating layer: the identification is carried out by XPS technique, including oxides, hydroxides, etc.
And (3) corrosion resistance test: the corrosion resistance of the coating is evaluated by a neutral salt spray test, a coating sample is prepared into a test sample with the thickness of 150 multiplied by 70mm, four sides of the test sample are sealed by adhesive tapes, then the test sample is put into a neutral salt spray test box and taken out after 1000 hours, corrosion products on the surface of the coating are removed, the weight loss of a unit area is measured, the less the weight loss is, and the better the corrosion resistance is.
And (3) blackening resistance testing: and evaluating the blackening resistance of the plating layer by adopting a damp-heat experiment. The zinc-aluminum-magnesium plated steel plate is placed in an acid solution with the pH value of 5 to be soaked for 60 seconds, then is rinsed by deionized water, and is dried by drying air flow, the surface brightness of the zinc-aluminum-magnesium plated steel plate is measured to be L0, then the sample is placed in a damp and hot environment, the damp and hot temperature is 50 ℃, the relative humidity is 60%, the sample is placed for 120 hours, then is taken out to be measured to be the surface brightness L1, L1 is subtracted from L0 to obtain the brightness change delta L, and the larger delta L is, the poorer the blackening resistance of the plating layer is indicated.
And (3) testing the bonding property: the test method for bond strength is ASTM D1002, and the shear failure mode evaluation standard is ISO 10365. The adhesive is commercial structural adhesive, and the shear strength of the adhesive is 25-30 MPa. In the shear failure mode, the CF mode is the most preferable, the SCF mode is the next, and the AF mode is the worst.
The results of the performance evaluation are shown in Table 3.
TABLE 1
TABLE 2
TABLE 3
As can be seen from the data in Table 3, the Zn-Al-Mg coated steels according to examples 1-8 of the present invention have a variation in brightness of 1.9-2.7, a strong blackening resistance, and a weight loss per unit area of 0.28-3.91g/m2Good corrosion resistance and bonding strength of 25-31.1g/m2The shear failure mode of example 5 was SCF, with the exception of CF, which exhibited high bond strength. The brightness change amount of the zinc-aluminum-magnesium coated steel provided by the comparative examples 1 to 9 is 3.3 to 8.5, the blackening resistance is inferior to that of the embodiment of the invention, and the weight loss per unit area is 0.028 to 1000g/m2The bonding strength is 13.6-22.1g/m2The shear failure modes were all AF and the bond strengths were inferior to those of examples 1-8 of the present invention.
The invention provides a zinc-aluminum-magnesium coated steel and a preparation method thereof, wherein the coating in the zinc-aluminum-magnesium coated steel contains Al and Mg elements, so that the zinc-aluminum-magnesium coated steel has good corrosion resistance; at the same time, the grain size of the coating is controlled to reduce the curvature radius of the grain surface, increase the curvature and reduce the oxide filmStability, thereby improving the blackening resistance of the zinc-aluminum-magnesium coating. The zinc-aluminum-magnesium coated steel provided by the invention has the brightness variation of 1.9-2.7, strong blackening resistance and weight loss of 0.28-3.91g/m per unit area2Good corrosion resistance and bonding strength of 25-31.1g/m2The shear failure mode is usually SCF, and the bonding strength is high.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The zinc-aluminum-magnesium coated steel is characterized in that a zinc-aluminum-magnesium coating of the zinc-aluminum-magnesium coated steel comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
the grain size of the zinc-aluminum-magnesium coating is less than or equal to 300 mu m, the sum of the mass fractions of Mg and Al is less than or equal to 15%, and the volume proportion of hydroxide in the zinc-aluminum-magnesium coating is more than or equal to 80%.
2. The zinc-aluminum-magnesium coated steel according to claim 1, wherein the thickness of the steel substrate of the zinc-aluminum-magnesium coated steel is 0.5 to 6.0mm, and the thickness of the zinc-aluminum-magnesium coating of the zinc-aluminum-magnesium coated steel is 5 to 40 μm.
3. The method of producing a zinc-aluminum-magnesium coated steel as set forth in any one of claims 1 to 2, comprising,
obtaining the plating solution with the temperature of 400-500 ℃; the plating solution comprises the following chemical components in percentage by mass: mg is more than or equal to 0.8 percent, Al is less than or equal to 10 percent, and the balance is Zn and inevitable impurities;
immersing the steel plate with the temperature of 450-500 ℃ into the plating solution for galvanizing to obtain the steel plate with a plating layer;
and cooling the steel plate with the coating to obtain the zinc-aluminum-magnesium coated steel.
4. The method as claimed in claim 3, wherein the cooling step comprises a first cooling step, the first cooling step is a gas cooling step, the first cooling rate is greater than or equal to 10k/s, the first cooling start temperature is 400-410 ℃, and the first cooling end temperature is 290-310 ℃.
5. The method for preparing a zinc-aluminum-magnesium plated plate according to claim 4, wherein the gas used for gas cooling is at least one of the following gases: air, nitrogen, argon, carbon dioxide.
6. The method as claimed in claim 4, wherein the first cooling step comprises a second cooling step of cooling the steel plate with the coating layer with water mist, wherein the second cooling start temperature is 350-.
7. The method for preparing the zinc-aluminum-magnesium plating plate according to claim 6, wherein the size of water mist drops used for cooling the water mist is less than or equal to 0.1 mm.
8. The method for preparing a Zn-Al-Mg coated plate according to claim 6, wherein the water mist quality of the surface of the steel plate with the coating is more than or equal to 1g/m during the cooling2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110212169.3A CN113025939B (en) | 2021-02-25 | 2021-02-25 | Zinc-aluminum-magnesium coated steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110212169.3A CN113025939B (en) | 2021-02-25 | 2021-02-25 | Zinc-aluminum-magnesium coated steel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113025939A CN113025939A (en) | 2021-06-25 |
| CN113025939B true CN113025939B (en) | 2021-12-21 |
Family
ID=76462124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110212169.3A Active CN113025939B (en) | 2021-02-25 | 2021-02-25 | Zinc-aluminum-magnesium coated steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113025939B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992834A (en) * | 2013-12-03 | 2016-10-05 | 日新制钢株式会社 | Hot-dip zn-alloy-plated steel sheet and method for producing same |
| CN110004389A (en) * | 2019-03-20 | 2019-07-12 | 首钢集团有限公司 | A kind of anti-blacking zinc-aluminum-magnesium coated steel and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120075235A (en) * | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | Hot dip zn alloy plated steel sheet having excellent anti-corrosion and method for manufacturing the steel sheet using the same |
-
2021
- 2021-02-25 CN CN202110212169.3A patent/CN113025939B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992834A (en) * | 2013-12-03 | 2016-10-05 | 日新制钢株式会社 | Hot-dip zn-alloy-plated steel sheet and method for producing same |
| CN110004389A (en) * | 2019-03-20 | 2019-07-12 | 首钢集团有限公司 | A kind of anti-blacking zinc-aluminum-magnesium coated steel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113025939A (en) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110983224B (en) | Hot-dip galvanized aluminum-magnesium coated steel and preparation method thereof | |
| CN112080746B (en) | Zinc-aluminum-magnesium coated steel and preparation method thereof | |
| CN101760712B (en) | Production method for hot dip galvanized steel sheet in high manganese steel with great coating surface quality | |
| WO2021248765A1 (en) | Hot-dipped zinc-aluminum-magnesium coated steel sheet and manufacturing method therefor | |
| KR0176301B1 (en) | Hot-dip aluminum plated steel sheet excellent in corrosion resistance and heat resistance and its production | |
| RU2445401C2 (en) | STEEL MATERIAL WITH Mg-BASED ALLOY COATING | |
| TWI686510B (en) | Coated steel | |
| CN110835757B (en) | Hot-dip galvanized steel sheet with excellent adhesive property and preparation method thereof | |
| CN103270185B (en) | Metal coated steel plates, alloyed hot-dip galvanized steel sheet and manufacture method thereof | |
| CN113512691A (en) | Zinc-aluminum-magnesium coated steel and preparation method thereof | |
| CN106916998A (en) | A kind of super anticorrosive zinc base alloy layer steel band and its production method | |
| CN111575626A (en) | Hot-dip galvanized hot-rolled steel and preparation method thereof | |
| CN111004971B (en) | Hot-dip plated steel and preparation method thereof | |
| US7811674B2 (en) | Hot-dip galvanizing bath and galvanized iron article | |
| CN114369783B (en) | Hot dip galvanized coated steel sheet and preparation method thereof | |
| CN113025939B (en) | Zinc-aluminum-magnesium coated steel and preparation method thereof | |
| KR20030077545A (en) | Zinc-Based Metal Plated Steel Sheet and Method for Production thereof | |
| CN114214540B (en) | Galvanized steel sheet and coating and preparation method thereof | |
| CN103173707A (en) | Hot-dipped galvanized alloy coating with high corrosion resistance for steel member and preparation process thereof | |
| CN115109967A (en) | Hot-dip high-strength steel plate and preparation method thereof | |
| JPH0159347B2 (en) | ||
| CN110819895B (en) | Composite coating steel and preparation method thereof | |
| KR101613354B1 (en) | Coated steel plate and mehtod for manufacturing the same | |
| CN113025938B (en) | Galvanized steel sheet with excellent under-film corrosion resistance and preparation method thereof | |
| CN115287565B (en) | Coated steel plate and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |