CN116752067A - Zinc alloy for zinc bath iron control hot dip coating - Google Patents
Zinc alloy for zinc bath iron control hot dip coating Download PDFInfo
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- CN116752067A CN116752067A CN202310924563.9A CN202310924563A CN116752067A CN 116752067 A CN116752067 A CN 116752067A CN 202310924563 A CN202310924563 A CN 202310924563A CN 116752067 A CN116752067 A CN 116752067A
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- zinc
- hot dip
- zinc alloy
- dip coating
- alloy
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 239000011701 zinc Substances 0.000 title claims abstract description 112
- 229910001297 Zn alloy Inorganic materials 0.000 title claims abstract description 104
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 104
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 238000003618 dip coating Methods 0.000 title claims abstract description 66
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 58
- 239000012535 impurity Substances 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 24
- 238000005246 galvanizing Methods 0.000 claims description 32
- 238000007747 plating Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000002893 slag Substances 0.000 abstract description 12
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 11
- 229910000611 Zinc aluminium Inorganic materials 0.000 abstract description 2
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 39
- 239000010959 steel Substances 0.000 description 39
- 239000011248 coating agent Substances 0.000 description 23
- 238000000576 coating method Methods 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 13
- 239000002245 particle Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000617 Mangalloy Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 229910000691 Re alloy Inorganic materials 0.000 description 2
- 229910007567 Zn-Ni Inorganic materials 0.000 description 2
- 229910007614 Zn—Ni Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000681 Silicon-tin Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- LQJIDIOGYJAQMF-UHFFFAOYSA-N lambda2-silanylidenetin Chemical compound [Si].[Sn] LQJIDIOGYJAQMF-UHFFFAOYSA-N 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229940035637 spectrum-4 Drugs 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- 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
- C23C2/50—Controlling or regulating the coating processes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention provides a zinc alloy for zinc bath iron control hot dip coating, which contains 0.005-0.02wt.% Ga, 0.01-1.2wt.% Si and the balance Zn, al and unavoidable impurities based on the total mass of the zinc alloy for zinc bath iron control hot dip coating. Proper amounts of Ga and Si are added into a zinc bath of the zinc-aluminum alloy, and trace Ga promotes Si to better combine with free Fe in the zinc bath to enter a slag phase, so that the purpose of controlling iron in the zinc bath is achieved.
Description
Technical Field
The invention belongs to the technical field of hot galvanizing, and relates to a zinc alloy for zinc bath iron control hot galvanizing.
Background
With the rapid development of industries such as communication, electric power, automobiles, household appliances, buildings and the like, the demand of hot dip galvanized products is increased year by year, and the requirements on the quality of the products are continuously improved. The hot galvanizing principle is as follows: cleaning rust on the surface of the steel part through acid washing or atmosphere reduction, and then immersing the steel part in zinc alloy liquid or directly immersing the steel part in the zinc alloy liquid after solvent treatment and drying; iron on the surface of the steel member reacts with molten zinc to form an alloy coating on the surface of the steel member. During the hot galvanizing process, fe on the surface of the steel part can infiltrate into the zinc bath due to the fact that the steel part is soaked in the molten zinc bath, and the Fe content in the zinc bath is increased, so that the problems of zinc bath fluidity, plating thickening, plating adhesion deterioration and the like are caused. In order to reduce the Fe content in the zinc bath and improve the adhesive force of hot dip galvanized products, the hot dip galvanized alloy technical market shows that: fe in the hot galvanizing zinc bath of the structural part is lower than 0.015 percent, and the iron content in the hot galvanizing zinc bath of the strip steel is lower than 0.005 percent.
For example, in the current domestic and foreign hot galvanizing industry, an alloy plating layer added with trace alloy elements such as Ni, RE and the like has good surface quality, excellent corrosion resistance, excellent combination property and mechanical property and better zinc bath purifying capability. However, as the steel production process is improved, the components of the steel are complex, and the change causes some galvanization quality problems in the traditional hot galvanizing, such as the quality problems of quick rise of Fe content in zinc bath, thicker coating thickness, poor adhesive force and the like. On the other hand, the structure of the plating part is complex and the shape is changeable, such as a large pipe tower part, steel with higher silicon-manganese content is mostly adopted, the structure is more complex than that of single angle steel, plate materials, flat steel, steel pipes, strip steel with different types and the like, the structure influences the heat transfer of galvanization and the flow of zinc liquid, the adhesion of a plating layer is influenced, and higher requirements are put forward on hot galvanizing alloy. The pickling time of large steel parts and complex steel parts is long, and the local part can generate overpickling; the pickling brings more iron particles into the plating assisting liquid and the zinc alloy liquid, so that impurity iron in the zinc alloy liquid is increased in the zinc plating process, and more zinc slag is generated. Meanwhile, the hot dip plating requirement of the structural member is high, the galvanizing time is required to be prolonged, the zinc bath heat transfer effect is poor, the zinc bath fluidity is poor, more ferrum of the steel member is dissolved into zinc alloy liquid, the thickness of a coating is thicker, the adhesion of the coating is poor, particles can appear in the coating, the coating is not smooth, and the like, and the quality of the coating is poor. In the prior art, the zinc alloy for hot galvanizing mainly comprises Zn-Al-RE alloy and Zn-Ni alloy, which cannot be applied to the surface hot-dip coating process of steel materials with complex components, and cannot effectively solve the problem of zinc slag increase caused by excessive iron particles entering zinc alloy liquid; the Zn-Ni alloy is used for hot dip coating of the structural member for more than 3 minutes, the concentration of iron particles reaches 0.032% or even more than 0.04% in six continuous months, and the problems of embrittlement of a coating, poor local adhesive force of a coated member and the like occur; the strip steel uses Zn-Al-RE alloy zinc bath, the concentration of iron particles reaches 0.01% in six months continuously, and the plate surface particle phenomenon occurs.
CN113881911a discloses a zinc bath silicon-tin alloy, which improves the fluidity of the zinc bath by changing the surface tension of the zinc alloy, thereby achieving the effects of slowing down iron dissolution, controlling the thickness of the coating, improving the adhesion of the coating and improving other qualities of the coating.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a zinc alloy for zinc bath iron control hot dip coating.
Aiming at the technical problems, the following solution is provided:
the invention provides a zinc alloy for zinc bath iron control hot dip coating, which comprises 0.005-0.02wt% of Ga, 0.01-1.2wt% of Si and the balance of Zn, al and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip coating.
Preferably, the Al content is 5-30wt.%.
Preferably, the zinc alloy for zinc bath iron control hot dip coating contains 0.008wt.% Ga, 0.3wt.% Si, and the balance Zn, al and unavoidable impurities, based on the total mass of the zinc alloy for hot dip coating.
Preferably, the zinc alloy for zinc bath iron control hot dip coating contains 0.01wt.% Ga, 0.5wt.% Si, and the balance Zn, al and unavoidable impurities, based on the total mass of the zinc alloy for hot dip coating.
Preferably, the zinc alloy for zinc bath iron control hot dip coating contains 0.015wt.% Ga, 0.8wt.% Si, and the balance Zn, al and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot dip coating.
Preferably, the zinc alloy for zinc bath iron control hot dip coating contains 0.02wt.% Ga, 1.2wt.% Si, and the balance Zn, al and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot dip coating.
Preferably, the zinc alloy for zinc bath iron control hot dip coating contains 0.005wt.% Ga, 0.01wt.% Si, and the balance Zn, al, and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot dip coating.
The invention also provides a hot galvanizing method, which comprises the steps of placing the substrate to be plated in the molten zinc alloy for hot galvanizing, and forming a plating layer on the surface of the substrate to be plated.
Compared with the prior art, the invention has the following beneficial effects:
according to the zinc alloy for hot dip coating provided by the invention, a proper amount of Ga and Si elements are added into the zinc bath of the zinc-aluminum alloy, so that trace Ga promotes better combination of Si and free Fe in the zinc bath and enters a slag phase through the synergistic effect of Ga and Si, thereby achieving the purpose of controlling iron in the zinc bath.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a back-scattered view of a hot dip galvanized slag sample produced in example 3.
FIG. 2 is a back-scattered view of a hot dip galvanized slag sample produced in comparative example 1.
Detailed Description
The invention provides a zinc alloy for zinc bath iron control hot dip coating, which comprises 0.005-0.02wt% of Ga, 0.01-1.2wt% of Si and the balance of Zn, al and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip coating.
Through a great deal of researches, the applicant finds that the zinc bath is added with a proper amount of Ga and Si trace elements, the obtained zinc alloy for hot dip coating is suitable for various complex components and steel materials with complex shapes, the iron content in the zinc bath can be effectively controlled to be kept at a lower level in the hot dip coating process, the adhesive force of a coating can be increased, and the quality of the coating is higher.
According to the zinc alloy for zinc bath iron control hot dip coating, through the synergistic effect of Ga and Si, trace Ga promotes better combination of Si and free Fe in zinc bath, enters a slag phase, so that the purpose of zinc bath iron control is achieved, the iron content in the zinc bath is maintained below 0.015% after more than 3 minutes of zinc continuous galvanizing for six months in hot dip coating of structural parts, the iron content in the zinc bath is maintained below 0.005% after more six months of strip steel continuous galvanizing, the coating adhesion is good, and the surface of the strip steel has no particle defect.
As the common knowledge of the person skilled in the art, the zinc alloy for hot dip coating provided by the invention also contains unavoidable impurities, and the impurities are present in the usual content, and the invention has no special requirement.
In a partially preferred embodiment, the Al content is 5-30wt.%.
In a preferred embodiment, the zinc alloy for iron-controlled zinc bath hot dip coating contains 0.008wt.% Ga, 0.3wt.% Si, and the balance Zn, al and unavoidable impurities, based on the total mass of the zinc alloy for hot dip coating.
In a preferred embodiment, the zinc alloy for iron-controlled zinc bath hot dip coating contains 0.01wt.% Ga, 0.5wt.% Si, and the balance Zn, al and unavoidable impurities, based on the total mass of the zinc alloy for hot dip coating.
In a preferred embodiment, the zinc alloy for iron-controlled zinc bath hot-dip coating contains 0.015wt.% Ga, 0.8wt.% Si, and the balance Zn, al, and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot-dip coating.
In a preferred embodiment, the zinc alloy for iron-controlled zinc bath hot-dip coating contains 0.02wt.% Ga, 1.2wt.% Si, and the balance Zn, al and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot-dip coating.
In a preferred embodiment, the zinc alloy for iron-controlled zinc bath hot-dip coating contains 0.005wt.% Ga, 0.01wt.% Si, and the balance Zn, al, and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for hot-dip coating.
The invention also provides a hot galvanizing method, which comprises the steps of placing the substrate to be plated in the molten zinc alloy for hot galvanizing, and forming a plating layer on the surface of the substrate to be plated.
In some alternative embodiments, the substrate to be plated may be a conventional substrate such as angle steel, plate, flat steel, steel pipe, strip steel, etc., or may be a complex-shaped steel member such as a large-pipe tower, and the components of the substrate to be plated may be diversified.
In the hot dip galvanizing alloy provided by the invention, the components of the hot dip galvanizing zinc alloy are properly selected, so that the hot dip galvanizing zinc alloy is suitable for hot dip galvanizing treatment of surfaces of steel materials with various complex components and complex shapes, and therefore, the hot dip galvanizing method provided by the invention is suitable for various base materials to be plated with complex shapes.
The invention will be described more fully hereinafter with reference to the accompanying drawings and preferred embodiments in order to facilitate an understanding of the invention, but the scope of the invention is not limited to the following specific embodiments.
Example 1
The zinc alloy S1 for hot dip galvanizing of the zinc bath iron control contains 0.008wt% of Ga, 0.3wt% of Si, 10wt% of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip galvanizing.
The zinc alloy S1 for hot dip coating of the embodiment is adopted to carry out hot dip coating on angle steel and steel pipes for 1.5 minutes, the steel pipes are continuously used for six months, the iron content in a zinc bath is maintained below 0.015%, and the adhesion test of a coating is good.
Example 2
The zinc alloy S2 for hot dip galvanizing of the zinc bath iron control contains 0.01 weight percent of Ga, 0.5 weight percent of Si, 15 weight percent of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip galvanizing.
The zinc alloy S2 for hot dip coating is used for hot dip coating of strip steel and steel wire ropes, and is continuously used for nine months, the ferrum content in a zinc bath is maintained below 0.0030 percent, the adhesion test of a coating is good, and the coating has no surface defects and is bright and clean.
Example 3
The zinc alloy S3 for hot dip galvanizing of the zinc bath iron control contains 0.015wt% of Ga, 0.8wt% of Si, 15wt% of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip galvanizing.
The high-silicon high-manganese steel large pipe tower with discs at two ends is hot dip plated for 3 minutes by adopting the zinc alloy S3 for hot dip plating of the embodiment, and the zinc alloy is continuously used for one year, wherein the iron content in a zinc bath is maintained at 0.012 percent, and the plating adhesion test is good, and the surface defect is avoided.
The backscattering diagram of the hot dip galvanized slag sample produced in this example is shown in fig. 1, wherein the spectrum 1 corresponds to the impurity phase, the spectrum 3 corresponds to the part except the impurity, and the EDS components are shown in table 1.
TABLE 1 EDS component of zinc dross sample produced in example 3
Example 4
The zinc alloy S4 for hot dip galvanizing of the zinc bath iron control contains 0.02 weight percent of Ga, 1.2 weight percent of Si, 20 weight percent of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip galvanizing.
The zinc alloy S4 for hot dip coating of the embodiment is adopted to dip coat the photovoltaic bracket for 2 minutes, and is continuously used for one year, the ferrum content in the zinc bath is maintained at 0.013%, the adhesion test of the coating is good, and the coating has no surface defects.
Comparative example 1
The zinc alloy S5 for hot dip coating comprises 0.8wt% of Si, 15wt% of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip coating.
The zinc alloy S5 for hot dip coating of the comparative example is adopted for hot dip coating of the square high silicon high manganese steel large pipe tower for 3 minutes, and is continuously used for six months, the iron content in the zinc bath is maintained at 0.029%, the coating adhesion test is good, and fewer particles and more obvious flow marks appear on the surface.
The backscattering diagram of the hot dip galvanized slag sample produced in this comparative example is shown in fig. 2, wherein the spectrum 1 corresponds to the impurity phase, the spectrum 4 corresponds to the part except the impurity, and the EDS components are shown in table 2.
TABLE 2 EDS component of zinc dross produced in comparative example 1
As can be seen from the backscattering diagrams and EDS component analysis of the hot-dip galvanized slag of comparative example 3 and this comparative example, the hot-dip galvanized slag of example 3 has a higher Fe content, and it can be seen that the zinc bath of the present invention has a remarkable Fe enrichment effect on the zinc slag, and the zinc bath has a better Fe control effect, presumably because of this phenomenon: trace Ga promotes better combination of Si and free Fe in zinc bath to achieve the purpose of controlling iron in zinc bath, thereby reducing harmful impurity iron element in zinc liquid in a galvanized pot and eliminating quality reduction of galvanized coating caused by higher content of iron element.
Comparative example 2
The zinc alloy S6 for hot dip coating comprises 0.01wt% of Ga, 15wt% of Al and the balance of Zn and unavoidable impurities carried by the zinc alloy based on the total mass of the zinc alloy for hot dip coating.
The zinc alloy S6 for hot dip coating of the comparative example is adopted to carry out hot dip coating on the square high-silicon high-manganese steel large pipe tower for 3 minutes, the continuous use is carried out for six months, the iron content in the zinc bath is maintained at 0.029-0.038%, the coating adhesion test is good, and fewer particles and more obvious flow marks appear on the surface.
Comparative example 3
A zinc alloy S7 for hot dip coating comprises 5wt% of Al, 1.0wt% of Ni, and the balance of Zn and unavoidable impurities of the zinc alloy.
The common angle steel is hot dip plated for 2 minutes by adopting the zinc alloy S7 for hot dip plating in the comparative example, the iron content in the zinc bath is maintained at 0.032% after continuous use for one year, the plating adhesion test is good, and more particles and more obvious flow marks appear on the surface.
Comparative example 4
A zinc alloy S8 for hot dip coating comprises 5wt% of Al, 0.072wt% of RE, and the balance of Zn and unavoidable impurities brought by the zinc alloy.
The hot dip zinc alloy S8 of the comparative example is adopted to plate zinc on strip steel and steel wire ropes, the continuous use is carried out for six months, the iron content in zinc bath is maintained at 0.0089%, the coating adhesion test is good, fewer particles exist on the surface of the strip steel, and obvious particles exist on the surface of the steel wire ropes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. A zinc alloy for zinc bath iron control hot dip coating, characterized by comprising 0.005-0.02wt.% Ga, 0.01-1.2wt.% Si, and the balance Zn, al and unavoidable impurities, based on the total mass of the zinc alloy for zinc bath iron control hot dip coating.
2. Zinc alloy for iron control hot dip coating according to claim 1, characterized in that the Al content is 5-30wt.%.
3. The zinc alloy for zinc-controlled iron hot dip coating according to claim 1 or 2, wherein 0.008wt.% Ga, 0.3wt.% Si, and the balance Zn, al and unavoidable impurities are contained based on the total mass of the zinc alloy for zinc-controlled iron hot dip coating.
4. The zinc alloy for zinc-controlled iron hot dip coating according to claim 1 or 2, wherein 0.01wt.% Ga, 0.5wt.% Si, and the balance Zn, al and unavoidable impurities are contained based on the total mass of the zinc alloy for zinc-controlled iron hot dip coating.
5. The zinc alloy for zinc-controlled iron hot dip coating according to claim 1 or 2, wherein the zinc alloy contains 0.015wt.% Ga, 0.8wt.% Si, and the balance Zn, al and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for zinc-controlled iron hot dip coating.
6. The zinc alloy for zinc-controlled iron hot dip coating according to claim 1 or 2, wherein 0.02wt.% Ga, 1.2wt.% Si, and the balance Zn, al and unavoidable impurities associated with the zinc alloy are contained based on the total mass of the zinc alloy for zinc-controlled iron hot dip coating.
7. The zinc alloy for zinc-controlled iron hot dip coating according to claim 1 or 2, wherein the zinc alloy for zinc-controlled iron hot dip coating contains 0.005wt.% Ga, 0.01wt.% Si, and the balance of Zn, al and unavoidable impurities associated with the zinc alloy, based on the total mass of the zinc alloy for zinc-controlled iron hot dip coating.
8. A hot dip galvanizing method, characterized by comprising placing a substrate to be plated in the molten zinc alloy for iron-controlling hot dip galvanizing according to any one of claims 1 to 7, and forming a plating layer on the surface of the substrate to be plated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310924563.9A CN116752067A (en) | 2023-07-26 | 2023-07-26 | Zinc alloy for zinc bath iron control hot dip coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310924563.9A CN116752067A (en) | 2023-07-26 | 2023-07-26 | Zinc alloy for zinc bath iron control hot dip coating |
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| CN116752067A true CN116752067A (en) | 2023-09-15 |
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| CN202310924563.9A Pending CN116752067A (en) | 2023-07-26 | 2023-07-26 | Zinc alloy for zinc bath iron control hot dip coating |
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