A zinc-containing multicomponent alloy, a method for producing the same, a galvanizing method, and a plated metal member

Abstract

This application provides a zinc-containing multi-element alloy, its preparation method, a zinc plating method, and metal coated parts, relating to the field of hot-dip galvanizing technology. The chemical composition of the zinc-containing multi-element alloy provided in this application, by weight percentage, includes: 0.005%~0.4% Al, 0.4%~2.0% Ni, 0.1%~0.5% Mn, 0.001%~0.05% Ti, 0.01%~0.1% rare earth metals, and 0.001%~0.05% Si, with the balance being Zn and unavoidable impurities. This application obtains a zinc-containing multi-element alloy by synergistically designing the types and contents of various trace elements such as Al, Ni, Mn, Ti, rare earth elements, and Si. This zinc-containing multi-element alloy achieves a comprehensive effect of improved Ni utilization efficiency, controlled zinc-iron alloy layer growth, and uniform coating structure, thereby significantly improving the corrosion resistance of the coating while reducing its thickness.

Description

Technical Field

[0001] This application relates to the fields of non-ferrous metal smelting and hot-dip galvanizing technology, and in particular to a zinc-containing multi-element alloy and its preparation method, galvanizing method, and metal plating parts. Background Technology

[0002] Hot-dip galvanizing is one of the most widely used steel corrosion protection technologies. Its basic principle is to immerse a surface-treated steel substrate in molten zinc, causing a metallurgical reaction between the iron and zinc on the steel surface. This results in a dense zinc-iron alloy layer and a pure zinc layer on the substrate surface, significantly improving the corrosion resistance of steel structural components. This technology is widely used in power transmission towers, transportation facilities, building structural components, pipes, and mechanical parts.

[0003] In existing hot-dip galvanizing processes, a certain amount of nickel is usually added to the zinc bath to improve coating quality. Nickel can effectively suppress abnormal zinc plating reactions caused by high levels of elements such as silicon and phosphorus in the steel, known as the Sandelin effect, thereby preventing excessive coating growth and improving coating uniformity and surface quality.

[0004] However, in actual production, traditional zinc-nickel alloy systems still have many problems. For example, during alloy smelting and use, nickel is prone to segregation or deposition, leading to uneven alloy structure and reducing the amount of nickel effectively participating in the zinc plating reaction, thus affecting the coating quality. Simultaneously, during immersion plating, the complex formation behavior of intermetallic compounds in the zinc bath easily generates a large amount of bottom dross, reducing the utilization rate of effective zinc and increasing production costs. Furthermore, for steels with complex compositions or high silicon content, traditional zinc-aluminum-nickel systems still struggle to completely suppress the abnormal growth of the zinc-iron alloy layer, easily resulting in problems such as excessively thick coatings, surface darkening, coating cracking, and decreased adhesion. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this application provides a zinc-containing multi-element alloy, its preparation method, a zinc plating method, and metal-plated parts. The technical problem to be solved by this application is achieved through the following technical solution: In a first aspect, this application provides a zinc-containing multi-element alloy, wherein the chemical composition of the zinc-containing multi-element alloy, by weight percentage, includes: 0.005%~0.4% Al, 0.4%~2.0% Ni, 0.1%~0.5% Mn, 0.001%~0.05% Ti, 0.01%~0.1% rare earth metals, 0.001%~0.05% Si, with the balance being Zn and unavoidable impurities.

[0006] In one feasible manner, the rare earth metal includes La and / or Ce.

[0007] Secondly, this application provides a method for preparing a zinc-containing multi-element alloy, used to prepare the zinc-containing multi-element alloy provided in the first aspect of this application, the preparation method comprising the following steps: Al, Ni, Mn, Ti, rare earth metals, Si and Zn are mixed in the proportions of the zinc-containing multi-element alloy as described in claim 1 and then subjected to heat treatment to obtain an alloy melt. The molten alloy is poured into a casting mold and cooled to obtain the zinc-containing multi-element alloy.

[0008] In one feasible approach, the temperature of the heat treatment is 650°C to 750°C.

[0009] Thirdly, this application provides a zinc plating method, comprising the following steps: The zinc-containing multi-element alloy provided in the first aspect of this application is mixed with zinc metal and then melted into a zinc plating solution; The substrate to be plated is immersed in the zinc plating solution for hot-dip galvanizing, forming a zinc coating on the surface of the substrate to be plated, thus obtaining a metal plated part.

[0010] In one feasible manner, the mass ratio of the zinc-containing multi-element alloy to the zinc metal mixture is 1:10~40.

[0011] In one feasible manner, the zinc plating solution contains 0.01% to 0.04% Ni by weight and 0.002% to 0.02% Al by weight.

[0012] In one feasible approach, the hot-dip plating treatment is performed at a temperature of 440°C to 470°C for a duration of 60 to 120 seconds.

[0013] In one feasible manner, the thickness of the zinc coating is ≤66μm.

[0014] Fourthly, this application provides a metal plated part, which is obtained by the zinc plating method provided in the third aspect of this application.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: This application obtains a zinc-containing multi-element alloy by synergistically designing the types and contents of various trace elements such as Al, Ni, Mn, Ti, rare earth elements and Si. This zinc-containing multi-element alloy can achieve the comprehensive effects of improved Ni utilization efficiency, controlled growth of zinc-iron alloy layer and uniform coating structure, thereby significantly improving the corrosion resistance of the coating while reducing the coating thickness. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 The microstructure of a traditional zinc-aluminum-nickel ternary alloy is shown. Figure 2 The surface corrosion morphology of a traditional zinc-aluminum-nickel ternary alloy coating is shown. Figure 3 The microstructure of a zinc-containing multi-element alloy according to an embodiment of this application is shown; Figure 4 The surface corrosion morphology of the zinc coating in an embodiment of this application is shown. Detailed Implementation

[0017] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments and application scenarios. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Unless otherwise specified, the following embodiments and features can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present application are within the scope of protection of the present application.

[0018] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] The first aspect of this application provides a zinc-containing multi-element alloy, the chemical composition of which, by weight percentage, includes: 0.005%~0.4% Al, 0.4%~2.0% Ni, 0.1%~0.5% Mn, 0.001%~0.05% Ti, 0.01%~0.1% rare earth metals (RE), 0.001%~0.05% Si, with the balance being Zn and unavoidable impurities.

[0020] In one embodiment, the rare earth metal includes La and / or Ce. Further, when the rare earth metal includes La and Ce, the mass ratio of La to Ce is 30-40:60-70.

[0021] This application achieves comprehensive control over the microstructure and hot-dip galvanizing reaction behavior of zinc alloy melts through the synergistic effect of multiple elements including Al, Ni, Mn, Ti, RE, and Si. Specifically, Ni is used to suppress abnormal galvanizing reactions caused by high Si and P content in the steel, thereby reducing abnormal coating thickness. Mn can, to a certain extent, replace some Ni in the alloy system, participating in the control of alloy microstructure, thus reducing Ni usage and alloy cost while ensuring coating performance. Furthermore, Mn, Ti, Si, and rare earth elements work together during alloy solidification and use through mechanisms such as solid solution strengthening, second-phase precipitation, and interfacial activity regulation. This improves the fluidity and crystallization behavior of the zinc alloy melt, refines the alloy grain structure, promotes the uniform distribution of Ni in the alloy, reduces Ni segregation and deposition tendency in the melt, thereby reducing slag phase formation during melting and use, and improving the effective utilization rate of Ni in the galvanizing reaction.

[0022] The second aspect of this application provides a method for preparing a zinc-containing multi-element alloy, used to prepare the zinc-containing multi-element alloy provided in the first aspect of this application. The method for preparing the zinc-containing multi-element alloy provided in this application includes the following steps: S11: Al, Ni, Mn, Ti, rare earth metals, Si and Zn are mixed according to the proportion of the zinc-containing multi-element alloy provided in the first aspect of the present application and then subjected to heat treatment to obtain an alloy melt.

[0023] Specifically, the heat treatment temperature is 650℃~750℃. Al, Ni, Mn, Ti, rare earth metals, Si, and Zn are obtained according to the weight percentages of Al 0.005%~0.4%, Ni 0.4%~2.0%, Mn 0.1%~0.5%, Ti 0.001%~0.05%, RE 0.01%~0.1%, and Si 0.001%~0.05%, and added to a melting pot for heating until all materials are fully melted. The slag on the surface of the melt is then skimmed off to obtain the alloy melt.

[0024] S12: Pour the molten alloy into a casting mold and cool it to obtain a zinc-containing multi-element alloy.

[0025] The preparation method provided in this application involves melting and alloying Al, Ni, Mn, Ti, rare earth elements, and Si and Zn within a temperature range of 700℃ to 900℃. This allows the alloying elements to fully dissolve and uniformly distribute within the zinc matrix, resulting in a homogeneous and stable multi-element zinc-based alloy. This preparation method has a simple process flow, and the alloying elements diffuse sufficiently in the melt, which helps to avoid segregation and deposition of Ni during alloy solidification, thereby improving the uniformity of the alloy structure. Simultaneously, through multi-element synergistic alloying, stable and dispersed strengthening phases or interface-controlled phases can be formed in the alloy, thereby improving the alloy's fluidity and solidification characteristics. This results in a uniform melting and minimal slag formation during actual galvanizing applications.

[0026] A third aspect of this application provides a zinc plating method, comprising the following steps: S21: The zinc-containing multi-element alloy and zinc metal provided in the first aspect of the present application are mixed and melted into a zinc plating solution.

[0027] Specifically, the mass ratio of the zinc-containing multi-element alloy to zinc metal is 1:10~40. In the zinc plating solution, the weight percentage of Ni is 0.01%~0.04%, and the weight percentage of Al is 0.002%~0.02%.

[0028] In some embodiments, the mixing ratio of the zinc-containing multi-element alloy and zinc metal is adjusted according to the coating composition requirements to ensure that the Ni weight percentage in the zinc plating solution is 0.01~0.04wt%, the Al content is in the range of 0.002~0.02wt%, and other components are present in trace amounts. For example, the mass ratio of the zinc-containing multi-element alloy and zinc metal is any one of 1:10, 1:15, 1:20, 1:30, or 1:40.

[0029] S22: The substrate to be plated is immersed in zinc plating solution and hot-dip galvanized to form a zinc coating on the surface of the substrate, thus obtaining a metal plated part.

[0030] Specifically, the hot-dip galvanizing temperature is 440℃~470℃, and the time is 60s~120s. The thickness of the zinc coating is ≤66μm.

[0031] In one embodiment, the temperature of the zinc plating solution is controlled at 440°C to 470°C, and the substrate to be plated is immersed in the zinc plating solution for 60s to 120s. After the immersion is completed, the plated steel part is taken out and naturally cooled to obtain a zinc coating with uniform structure and good adhesion. Its thickness can be controlled to ≤66μm. Compared with the traditional zinc-aluminum-nickel ternary alloy coating of 75μm, the zinc layer thickness is reduced by at least 10%, and the corrosion resistance of the coating is improved by at least 20%.

[0032] In one embodiment, the mixing ratio of zinc-containing multi-element alloy and zinc metal is determined according to the immersion plating requirements of the steel parts. The zinc-containing multi-element alloy can be added to the immersion zinc bath as an adjusting ingot to compensate for the loss of metals such as Al and Ni during the immersion zinc plating process, balance the effective metal content in the immersion plating solution, and ensure the quality of the plated parts.

[0033] During hot-dip galvanizing, Al, Si, and Ti elements in the zinc-containing multi-element alloy system can form a stable interface control layer on the steel substrate surface, thereby reducing the diffusion rate of Fe into the zinc bath and inhibiting the excessive formation of Fe-Zn intermetallic compounds. Specifically, these elements can effectively reduce the FeZn content in the coating diffusion layer. 13 The formation of brittle phases controls the growth rate of the zinc-iron alloy layer, thus avoiding abnormal thickening of the alloy layer caused by impurities such as silicon and phosphorus in the steel. Simultaneously, the purification effect of rare earth elements improves inclusions and active interfaces in the zinc bath, reducing FeZn content. X The formation of the slag phase keeps the free iron content in the immersion plating solution stable below 0.01%, thereby reducing the amount of zinc plating bottom dross and improving the utilization rate of available Zn in the zinc bath. This application can reduce the coating thickness and reduce bottom dross generation while ensuring the corrosion resistance of the coating, thus improving the utilization rate of zinc bath and reducing production costs.

[0034] The fourth aspect of this application provides a metal plated part, which is obtained by the zinc plating method provided in the third aspect of this application.

[0035] The technical solution of this application will be further described below with reference to specific embodiments.

[0036] Comparative Example 1 This comparative example provides a conventional zinc-aluminum-nickel ternary alloy, whose chemical composition, by weight percentage, includes: 0.1% Al and 1.0% Ni, with the balance being Zn and unavoidable impurities. The zinc-aluminum-nickel ternary alloy and zinc metal are mixed and melted to obtain a zinc-aluminum-nickel ternary alloy zinc plating bath. The chemical composition of the zinc-aluminum-nickel ternary alloy zinc plating bath, by weight percentage, includes: 0.002~0.02% Al and 0.02~0.04% Ni. The zinc-aluminum-nickel ternary alloy zinc plating bath is used to perform hot-dip plating on the substrate to be plated, forming a zinc-aluminum-nickel ternary alloy coating on the surface of the substrate, resulting in a metal plated part.

[0037] The microstructure diagram of the zinc-aluminum-nickel ternary alloy provided in this comparative example is as follows: Figure 1 As shown, the surface corrosion morphology of the zinc-aluminum-nickel ternary alloy coating is as follows: Figure 2 As shown. By Figure 1 As can be seen, the zinc-aluminum-nickel ternary alloy provided in this comparative example is mainly composed of a zinc-rich phase, a zinc-aluminum-nickel phase, and a zinc-nickel phase, among which the zinc-nickel phase is mainly composed of delta phase NiZn.10 The black phase visible in the tissue is a small amount of Zn-Al-Ni phase, whose main components are a complex phase of Ni2Al3 and NiZn8. Figure 2 The corrosion products exhibit a distinct agglomerated structure, with a large amount of flocculent or blocky corrosion products accumulating in localized areas, along with significant porosity and voids. This indicates a pronounced localization of the corrosion reaction, with corrosion preferentially occurring at certain phase or grain boundaries and gradually spreading outwards. This corrosion morphology typically suggests inhomogeneity within the coating, significant differences in localized electrochemical activity, and a tendency to form micro-cell corrosion, resulting in uneven distribution of corrosion products and noticeable corrosion pits. In the traditional Zn-Al-Ni ternary system, due to the large size and uneven distribution of the second phase, segregation regions are easily formed during coating formation. These regions create significant potential differences in the corrosive environment, leading to localized micro-cell corrosion, concentrating the corrosion reaction, and ultimately forming large corrosion pits and a loose corrosion product structure.

[0038] Example 1 This embodiment provides a zinc-containing multi-element alloy S1. The chemical composition of the zinc-containing multi-element alloy S1, by weight percentage, includes: 0.08% Al, 0.9% Ni, 0.1% Mn, 0.003% Ti, 0.06% RE, 0.003% Si, with the balance being Zn and unavoidable impurities.

[0039] Zinc-containing multi-element alloy S1 is mixed with zinc metal at a mass ratio of 1:30 and then melted to obtain zinc plating solution K1. The chemical composition of zinc plating solution K1, by weight percentage, includes: 0.0026% Al, 0.025% Ni, 0.003% Mn, 0.0001% Ti, 0.0002% RE, and 0.0001% Si.

[0040] Zinc plating solution K1 is used for zinc plating of iron tower components. Immersing the tower components in K1 for 60 seconds yields a zinc coating with a thickness of 62-65 μm. This coating has a bright and clean surface and a corrosion resistance rate of 0.00285 g / m². 2 The corrosion rate of traditional zinc-aluminum-nickel ternary alloy coatings with similar Al and Ni compositions is 0.00319 g / m. 2 In comparison, the corrosion resistance of the zinc coating in this embodiment is improved by 10.66%.

[0041] The microstructure diagram of the zinc-containing multi-element alloy S1 provided in this embodiment is as follows: Figure 3 As shown, the surface corrosion morphology of the zinc coating in this embodiment is as follows: Figure 4 As shown. By Figure 3It can be seen that the addition of elements such as Mn, Ti, rare earth elements, and Si promotes the formation of various phases in the microstructure of the multi-component zinc-nickel alloy. Among these, the irregularly shaped delta phase NiZn is particularly prominent. 10 The zinc-aluminum-nickel solid solution phase was replaced by a white Zn-Ni-La-Ce solid solution phase and Al. x Ni y The Al6Mn phase is replaced by the Al6Mn phase, of which some Al6Mn is replaced by the Al6Mn phase. x Ni y The phase contains trace amounts of Si and Ti elements. The presence of multiple phases refines the alloy microstructure and improves the uniform distribution of Ni within the alloy. In this embodiment, the solidification microstructure of the zinc-containing multi-component alloy S1 is significantly refined, the number of large-sized blocky phases is reduced, and the size of the second phase tends to be more uniform. Figure 4 It can be observed that the corrosion products are more uniformly distributed, with significantly smaller particle sizes, exhibiting a more continuous fine-particle or flocculent covering structure, and a marked reduction in surface porosity and deep corrosion pits. The corrosion products form a relatively dense covering layer on the coating surface, without significant large-area peeling or localized concentrated corrosion areas. This indicates a more uniform corrosion reaction and that the corrosion product layer provides a certain degree of protection. In this application, the addition of Mn, Ti, rare earth elements, and Si to the zinc-containing multi-element alloy transforms the alloy microstructure from a coarse, blocky structure to a fine, uniform structure. This microstructure characteristic changes the coating corrosion process from traditional localized corrosion to uniform corrosion and promotes the formation of a dense and stable corrosion product layer, thereby significantly improving the corrosion resistance of the coating.

[0042] Example 2 In one embodiment, this embodiment provides a zinc-containing multi-element alloy S2. The chemical composition of the zinc-containing multi-element alloy S2, by weight percentage, includes: 0.1% Al, 0.8% Ni, 0.2% Mn, 0.005% Ti, 0.01% RE, 0.005% Si, with the balance being Zn and unavoidable impurities.

[0043] Zinc-containing multi-element alloy S2 is mixed with zinc metal at a mass ratio of 1:30 and then melted to obtain zinc plating solution K2. The chemical composition of zinc plating solution K2, by weight percentage, includes: 0.003% Al, 0.026% Ni, 0.006% Mn, 0.00016% Ti, 0.0003% RE, and 0.00016% Si.

[0044] Zinc plating solution K2 is used for galvanizing ordinary large round tubes. Immersing the tubes in K2 for 60 seconds yields a zinc coating with a thickness of 58-62 μm. The zinc coating has a bright and clean surface, and its corrosion resistance rate is 0.00267 g / m². 2The corrosion rate of traditional zinc-aluminum-nickel ternary alloy coatings with similar Al and Ni compositions is 0.00319 g / m. 2 In comparison, the corrosion resistance of the zinc coating in this embodiment is improved by 16.30%.

[0045] Example 3 In one embodiment, this embodiment provides a zinc-containing multi-element alloy S3. The chemical composition of the zinc-containing multi-element alloy S3, by weight percentage, includes: 0.25% Al, 0.4% Ni, 0.4% Mn, 0.01% Ti, 0.02% RE, 0.01% Si, with the balance being Zn and unavoidable impurities.

[0046] Zinc-containing multi-element alloy S3 is mixed with zinc metal at a mass ratio of 1:20 and then melted to obtain zinc plating solution K3. The chemical composition of zinc plating solution K3, by weight percentage, includes: 0.012% Al, 0.02% Ni, 0.02% Mn, 0.0005% Ti, 0.001% RE, and 0.0005% Si.

[0047] Zinc plating solution K3 is used for galvanizing ordinary large square tubes. Immersing these tubes in K3 for 60 seconds yields a zinc coating with a thickness of 53-58 μm. The zinc coating has a bright and clean surface and a corrosion resistance rate of 0.00185 g / m. 2 The corrosion rate of traditional zinc-aluminum-nickel ternary alloy coatings with similar Al and Ni compositions is 0.00319 g / m. 2 In comparison, the corrosion resistance of the zinc coating in this embodiment is improved by 40.01%.

[0048] Example 4 In one embodiment, this embodiment provides a zinc-containing multi-element alloy S4. The chemical composition of the zinc-containing multi-element alloy S4, by weight percentage, includes: 0.3% Al, 0.6% Ni, 0.3% Mn, 0.015% Ti, 0.03% RE, 0.015% Si, with the balance being Zn and unavoidable impurities.

[0049] Zinc-containing multi-element alloy S4 is mixed with zinc metal at a mass ratio of 1:20 and then melted to obtain zinc plating solution K4. The chemical composition of zinc plating solution K4, by weight percentage, includes: 0.015% Al, 0.03% Ni, 0.015% Mn, 0.00075% Ti, 0.0015% RE, and 0.00075% Si.

[0050] Zinc plating solution K4 is used for galvanizing ordinary channel steel. Immersing the ordinary channel steel in zinc plating solution K4 for 60 seconds yields a zinc coating with a thickness of 48~53μm. The zinc coating has a bright and clean surface, and its corrosion resistance rate is 0.00164g / m².2 The corrosion rate of traditional zinc-aluminum-nickel ternary alloy coatings with similar Al and Ni compositions is 0.00319 g / m. 2 In comparison, the corrosion resistance of the zinc coating in this embodiment is improved by 48.58%.

[0051] Example 5 This embodiment provides a zinc-containing multi-element alloy S5. The chemical composition of the zinc-containing multi-element alloy S5, by weight percentage, includes: 0.4% Al, 0.8% Ni, 0.2% Mn, 0.02% Ti, 0.04% RE, 0.02% Si, with the balance being Zn and unavoidable impurities.

[0052] Zinc-containing multi-element alloy S5 is mixed with zinc metal at a mass ratio of 1:20 and then melted to obtain zinc plating solution K5. The chemical composition of zinc plating solution K5, by weight percentage, includes: 0.02% Al, 0.04% Ni, 0.01% Mn, 0.001% Ti, 0.002% RE, and 0.001% Si.

[0053] Zinc plating solution K5 is used for galvanizing ordinary steel scaffolding and other components. Immersing ordinary steel scaffolding in K5 for 60 seconds yields a zinc coating with a thickness of 39-48 μm. The zinc coating has a bright and clean surface and a corrosion resistance rate of 0.00125 g / m². 2 The corrosion rate of traditional zinc-aluminum-nickel ternary alloy coatings with similar Al and Ni compositions is 0.00302 g / m. 2 In comparison, the corrosion resistance of the zinc coating in this embodiment is improved by 58.61%.

[0054] Example 6 This embodiment provides a zinc-containing multi-element alloy S6. The chemical composition of the zinc-containing multi-element alloy S6, by weight percentage, includes: 0.3% Al, 1.2% Ni, 0.5% Mn, 0.025% Ti, 0.07% RE, 0.025% Si, with the balance being Zn and unavoidable impurities.

[0055] Example 7 This embodiment provides a zinc-containing multi-element alloy S7. The chemical composition of the zinc-containing multi-element alloy S7, by weight percentage, includes: 0.25% Al, 1.5% Ni, 0.5% Mn, 0.035% Ti, 0.08% RE, 0.035% Si, with the balance being Zn and unavoidable impurities.

[0056] Example 8 This embodiment provides a zinc-containing multi-element alloy S8. The chemical composition of the zinc-containing multi-element alloy S8, by weight percentage, includes: 0.4% Al, 2.0% Ni, 0.5% Mn, 0.05% Ti, 0.10% RE, 0.05% Si, with the balance being Zn and unavoidable impurities.

[0057] This application achieves significant results in alloy microstructure control, Ni utilization improvement, and zinc plating reaction kinetics control by constructing a multi-element synergistic regulation system of Al-Ni-Mn-Ti-RE-Si. The alloy exhibits a uniform and stable microstructure during melting and use, with a more uniform Ni distribution, thus significantly reducing Ni deposition and segregation in the molten pool and improving Ni utilization efficiency. Simultaneously, during hot-dip galvanizing, this multi-element system effectively inhibits the excessively rapid growth of the zinc-iron alloy layer, reduces the abnormal formation of Fe-Zn intermetallic compounds, resulting in a more uniform coating thickness and significantly reduced bottom slag formation. Compared to traditional zinc-aluminum-nickel ternary alloy systems, the coating thickness formed by this invention can be reduced by approximately 10% or more, the coating microstructure is more dense and uniform, the surface crack size is significantly reduced, and the corrosion resistance of the coating is improved by more than 20%, thereby significantly improving the overall performance of galvanized products and reducing production costs.

[0058] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0059] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A zinc-containing multicomponent alloy, characterized in that The chemical composition of the zinc-containing multi-element alloy, by weight percentage, includes: 0.005%~0.4% Al, 0.4%~2.0% Ni, 0.1%~0.5% Mn, 0.001%~0.05% Ti, 0.01%~0.1% rare earth metals, 0.001%~0.05% Si, with the balance being Zn and unavoidable impurities.

2. The zinc-containing multinary alloy of claim 1, wherein, The rare earth metals include La and / or Ce.

3. A method of producing a zinc-containing multinary alloy, characterized by, The method for preparing the zinc-containing multi-component alloy according to claim 1 or 2 includes the following steps: Al, Ni, Mn, Ti, rare earth metals, Si and Zn are mixed in the proportions of the zinc-containing multi-element alloy as described in claim 1 and then subjected to heat treatment to obtain an alloy melt. The molten alloy is poured into a casting mold and cooled to obtain the zinc-containing multi-element alloy.

4. The production method according to claim 3, characterized by, The temperature of the heat treatment is 650℃~750℃.

5. A galvanizing method characterized by, Includes the following steps: The zinc-containing multi-element alloy as described in claim 1 or 2 is mixed with zinc metal and then melted to form a zinc plating solution; The substrate to be plated is immersed in the zinc plating solution for hot-dip galvanizing, forming a zinc coating on the surface of the substrate to be plated, thus obtaining a metal plated part.

6. The galvanizing method according to claim 5, characterized by, The mass ratio of the zinc-containing multi-element alloy to the zinc metal mixture is 1:10~40.

7. The galvanizing method according to claim 5, characterized by, In the zinc plating solution, the weight percentage of Ni is 0.01%~0.04%, and the weight percentage of Al is 0.002%~0.02%.

8. The galvanizing method according to claim 5, characterized by, The hot-dip galvanizing process is performed at a temperature of 440℃~470℃ for a time of 60s~120s.

9. The galvanizing method according to claim 5, characterized by, The thickness of the zinc coating is ≤66μm.

10. A metal plated article, characterized by, The metal plating part is obtained by the zinc plating method as described in any one of claims 5 to 9.

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