Antifouling alloy, method for producing the same, and antifouling sheet produced from the same

Abstract

The application relates to a scale-inhibiting alloy and a preparation method thereof and a scale-inhibiting sheet manufactured from the scale-inhibiting alloy. The scale-inhibiting alloy comprises the following components: 55wt%-70wt% of Cu, 15wt%-30wt% of Zn, 5wt%-15wt% of Ni, 0.5wt%-3wt% of Si, 1wt%-5wt% of P, 0.001wt%-0.05wt% of a modifying element, and the balance of inevitable impurities, wherein the modifying element is one or more of B, Ti and Zr. The scale-inhibiting alloy adds the Si element for strengthening, so as to improve the mechanical properties and corrosion resistance; the Zn element is added as a negative electrode and the P element is added as a positive electrode, the alloying forms alpha phase+beta phase+multi-element brittle compound phase, can well excite the active current, and prevents the generation of water scale. The scale-inhibiting alloy has low production cost, meets the comprehensive requirements of cost, processing performance, corrosion resistance, mechanical properties, health and market acceptance of water treatment products, and has a good application prospect.

Description

Technical Field

[0001] This application belongs to the field of alloy technology, specifically relating to scale-inhibiting alloys, their preparation methods, and scale-inhibiting sheets made from the scale-inhibiting alloys. Background Technology

[0002] Scale buildup causes significant problems in daily life, such as clogging water outlets, reducing heating efficiency, increasing energy consumption, affecting aesthetics, and harming health. Currently, there are many scale inhibition solutions on the market, but all have shortcomings. For example, magnetic field scale inhibitors require an external power source, making them inconvenient to use; water softeners require continuous addition of sodium salts, which is troublesome and has high maintenance costs; silicon phosphate crystal chemical scale inhibitors dissolve quickly and have a short lifespan; and KDF55 has weak scale inhibition effects and is prone to excessive zinc precipitation.

[0003] A new type of scale-inhibiting alloy material has recently emerged on the market. It is made by melting more than eight elements and releases free electrons through the electrochemical interaction between different components to form a microcurrent. This microcurrent inhibits the formation of carbonates from calcium and magnesium ions in the water, thus achieving scale inhibition. Its advantages include high scale inhibition rate, long lifespan, and no precipitation of chemical substances. However, the high price of this material currently limits its industrial application. There are two main reasons for its high price: first, the high content of expensive elements, such as the high content of Ag, Sn, Ni, and Sb in patent application CN103805808A, leading to high raw material prices; second, the high waste ratio, due to excessive slag during smelting and severe segregation during casting. Furthermore, areas with severe segregation are unusable and require removal using processes such as wire cutting to obtain a usable product, which also increases processing costs. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of protection of this application.

[0005] This application provides a scale-inhibiting alloy, its preparation method, and scale-inhibiting sheets manufactured from the alloy. The scale-inhibiting alloy provided in this application is based on a Cu-Ni alloy, with Si added for strengthening to improve mechanical properties and corrosion resistance. Zn is added as the negative electrode and P as the positive electrode. Due to the large potential difference between P and Zn, and the alloying forming an α-phase + β-phase + multi-component brittle compound phase, an activation current can be effectively generated, preventing scale formation. P can lower the potential of Cu, making the Cu lattice more compact, promoting electron migration, and increasing the activation current. The scale-inhibiting alloy of this application is alloyed to form a uniformly distributed multi-component brittle compound phase. Adding an appropriate amount of modifier refines and further uniformly distributes this phase, improving processing performance and reducing processing costs. The scale inhibitor alloy of this application does not contain toxic elements (Pb, As, etc.) or expensive elements (Ag, Sb, Sn, rare earth, etc.), and has low raw material and production costs. It meets the comprehensive requirements of water treatment products in terms of cost, processing performance, corrosion resistance, mechanical properties, health, and market acceptance, and has a very good application prospect.

[0006] In one aspect, this application provides a scale-inhibiting alloy comprising the following components: 55wt%-70wt% Cu, 15wt%-30wt% Zn, 5wt%-15wt% Ni, 0.5wt%-3wt% Si, 1wt%-5wt% P, 0.001wt%-0.05wt% of a modifier element, with the balance being unavoidable impurities, wherein the modifier element is one or more of B, Ti, and Zr.

[0007] In embodiments of this application, the scale-inhibiting alloy comprises the following components: 55wt%-60wt% Cu, 20wt%-25wt% Zn, 10wt%-15wt% Ni, 1wt%-2wt% Si, 1wt%-3wt% P, 0.001wt%-0.03wt% of a modifying element, with the balance being unavoidable impurities, wherein the modifying element is one or more of B, Ti, and Zr; or

[0008] The scale-inhibiting alloy comprises the following components: 57wt%-58wt% Cu, 24wt%-25wt% Zn, 14wt%-15wt% Ni, 1.5wt%-1.8wt% Si, 2.5wt%-3wt% P, 0.01wt%-0.03wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0009] The scale-inhibiting alloy is composed of the following components: 55wt%-70wt% Cu, 15wt%-30wt% Zn, 5wt%-15wt% Ni, 0.5wt%-3wt% Si, 1wt%-5wt% P, 0.001wt%-0.05wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0010] The scale-inhibiting alloy is composed of the following components: 55wt%-60wt% Cu, 20wt%-25wt% Zn, 10wt%-15wt% Ni, 1wt%-2wt% Si, 1wt%-3wt% P, 0.001wt%-0.03wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0011] The scale-inhibiting alloy is composed of the following components: 57wt%-58wt% Cu, 24wt%-25wt% Zn, 14wt%-15wt% Ni, 1.5wt%-1.8wt% Si, 2.5wt%-3wt% P, 0.01wt%-0.03wt% of modifier elements, with the balance being unavoidable impurities. The modifier elements are one or more of B, Ti, and Zr.

[0012] In an embodiment of this application, the scale-inhibiting alloy comprises the following components: 57.2 wt% Cu, 24.36 wt% Zn, 14.1 wt% Ni, 1.6 wt% Si, 2.7 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.005 wt% B, 0.01 wt% Ti, and 0.005 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or

[0013] The scale-inhibiting alloy comprises the following components: 55.6 wt% Cu, 28.84 wt% Zn, 13.5 wt% Ni, 0.7 wt% Si, 1.3 wt% P, 0.04 wt% modifier elements, and 0.02 wt% impurities, wherein the modifier elements are 0.02 wt% B and 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or

[0014] The scale-inhibiting alloy comprises the following components: 68.4 wt% Cu, 16.95 wt% Zn, 7.4 wt% Ni, 2.8 wt% Si, 4.4 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% B, and the impurities are 0.02 wt% Pb and 0.01 wt% Fe; or

[0015] The scale-inhibiting alloy comprises the following components: 60.3 wt% Cu, 24.05 wt% Zn, 10.5 wt% Ni, 2.0 wt% Si, 3.1 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.02 wt% Fe; or

[0016] The scale-inhibiting alloy comprises the following components: 63.1 wt% Cu, 20.16 wt% Zn, 13.6 wt% Ni, 1.0 wt% Si, 2.1 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.02 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe.

[0017] In embodiments of this application, the unavoidable impurities include Pb and Fe, where Pb+Fe ≤ 0.05 wt% and Pb ≤ 0.02 wt%.

[0018] On the other hand, this application provides a method for preparing the above-mentioned scale-inhibiting alloy, comprising the following steps:

[0019] (1) Weigh out Cu ingots, Zn ingots, Cu-Ni master alloy, Cu-P master alloy, fast-melting Si and modifier elements according to the composition of the scale inhibitor alloy;

[0020] (2) Place the Cu ingot and the Cu-Ni master alloy at the bottom of the induction furnace, add a slag remover for refining and cover with charcoal, heat to 1050-1150℃ until all the material is melted, and filter off the surface slag.

[0021] (3) Adjust the temperature to 1030-1080℃, add the Zn ingot to the material obtained in step (2) and quickly press it into the bottom of the furnace. Stir it thoroughly after it melts.

[0022] (4) Add the Cu-P master alloy and the fast-melting Si to the material obtained in step (3) and stir thoroughly to ensure that the alloy liquid composition is uniform.

[0023] (5) Add the aforementioned altering element to the material obtained in step (4), heat to 1080-1150℃, spray fire, stir and keep warm for 2-3 minutes;

[0024] (6) Keep the material obtained in step (5) at 1000-1050℃ for 10-20 minutes to homogenize the alloy and make the impurities float. Remove the scum and impurities.

[0025] (7) Heat the material obtained in step (6) to 1050-1100℃, remove it from the furnace, and pour it into a mold to form an alloy ingot. Cool it to obtain the final product.

[0026] In the embodiments of this application, in step (1), the purity of the Cu ingot is ≥99.90%, the purity of the Zn ingot is ≥99.95%, the Ni content in the Cu-Ni master alloy is 30%-40%, the P content in the Cu-P master alloy is 20%-30%, and the purity of the rapidly melting Si is ≥99.60%.

[0027] In an embodiment of this application, in step (2), the amount of the slag remover is 0.2%-0.5% of the weight of the melt.

[0028] In the embodiments of this application, in step (7), the mold is made of beryllium copper.

[0029] In another aspect, this application provides a scale inhibitor sheet made of the above-described scale inhibitor alloy or a scale inhibitor alloy obtained by the above-described method.

[0030] In embodiments of this application, the scale inhibitor is used in a water softener or scale inhibitor.

[0031] The beneficial effects of this application are:

[0032] 1. The scale-inhibiting alloy of this application is based on Cu-Ni alloy, with Si element added for strengthening to improve mechanical properties and corrosion resistance; Zn element (electronegativity of 1.65) is added as the negative electrode and P element (electronegativity of 2.19) is added as the positive electrode. Because there is a large potential difference between P and Zn, and the alloying forms α phase + β phase + multi-component brittle compound phase (including Cu-Zn-Ni-Si, Cu-Zn-Ni-P, Cu-Zn-Ni-Si-P compounds), it can effectively stimulate the activation current and prevent the formation of scale.

[0033] 2. In the scale-inhibiting alloy of this application, P can reduce the potential of Cu, making the Cu lattice more compact, promoting electron migration, and increasing the activation current.

[0034] 3. The scale-inhibiting alloy of this application can alloy to form a uniformly distributed multi-component brittle compound phase. By adding an appropriate amount of modifier, the phase can be refined and its distribution can be made more uniform, which is beneficial to improving processing performance and reducing processing costs.

[0035] 4. The scale-inhibiting alloy of this application does not contain elements that are easily oxidized and slag-forming, such as Al, Mg, and Mn, or elements that are easily segregated, such as Sn. This can effectively prevent the generation of slag and save production costs.

[0036] 5. The method for preparing the scale-inhibiting alloy of this application involves a maximum temperature of no more than 1150°C during the smelting process, and the addition of a slag remover for refining can effectively suppress the generation of slag. The use of a beryllium copper mold with high thermal conductivity and fast heat dissipation for casting the alloy ingot facilitates the rapid cooling of the alloy ingot, effectively prevents component segregation, greatly reduces waste generation, and saves process costs.

[0037] 6. The scale-inhibiting alloy of this application can stably release an activation current of 50-90μA, with an effective scale inhibition rate of ≥80%.

[0038] 7. The scale inhibitor alloy of this application does not contain toxic elements (Pb, As, etc.) or expensive elements (Ag, Sb, Sn, rare earth, etc.), and has low raw material and production costs. It meets the comprehensive requirements of water treatment products in terms of cost, processing performance, corrosion resistance, mechanical properties, health, and market acceptance, and has a very good application prospect.

[0039] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application may be realized and obtained by means of the methods described in the description. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0041] This application provides a scale-inhibiting alloy comprising the following components: 55wt%-70wt% Cu, 15wt%-30wt% Zn, 5wt%-15wt% Ni, 0.5wt%-3wt% Si, 1wt%-5wt% P, 0.001wt%-0.05wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr.

[0042] In embodiments of this application, the scale-inhibiting alloy comprises the following components: 55wt%-60wt% Cu, 20wt%-25wt% Zn, 10wt%-15wt% Ni, 1wt%-2wt% Si, 1wt%-3wt% P, 0.001wt%-0.03wt% of a modifying element, with the balance being unavoidable impurities. The modifying element is one or more of B, Ti, and Zr; or

[0043] The scale-inhibiting alloy comprises the following components: 57wt%-58wt% Cu, 24wt%-25wt% Zn, 14wt%-15wt% Ni, 1.5wt%-1.8wt% Si, 2.5wt%-3wt% P, 0.01wt%-0.03wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0044] The scale-inhibiting alloy is composed of the following components: 55wt%-70wt% Cu, 15wt%-30wt% Zn, 5wt%-15wt% Ni, 0.5wt%-3wt% Si, 1wt%-5wt% P, 0.001wt%-0.05wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0045] The scale-inhibiting alloy is composed of the following components: 55wt%-60wt% Cu, 20wt%-25wt% Zn, 10wt%-15wt% Ni, 1wt%-2wt% Si, 1wt%-3wt% P, 0.001wt%-0.03wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr; or

[0046] The scale-inhibiting alloy is composed of the following components: 57wt%-58wt% Cu, 24wt%-25wt% Zn, 14wt%-15wt% Ni, 1.5wt%-1.8wt% Si, 2.5wt%-3wt% P, 0.01wt%-0.03wt% of modifier elements, with the balance being unavoidable impurities. The modifier elements are one or more of B, Ti, and Zr.

[0047] In embodiments of this application, the scale-inhibiting alloy comprises the following components: 57.2 wt% Cu, 24.36 wt% Zn, 14.1 wt% Ni, 1.6 wt% Si, 2.7 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.005 wt% B, 0.01 wt% Ti, and 0.005 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or

[0048] The scale-inhibiting alloy comprises the following components: 55.6 wt% Cu, 28.84 wt% Zn, 13.5 wt% Ni, 0.7 wt% Si, 1.3 wt% P, 0.04 wt% modifier elements, and 0.02 wt% impurities, wherein the modifier elements are 0.02 wt% B and 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or

[0049] The scale-inhibiting alloy comprises the following components: 68.4 wt% Cu, 16.95 wt% Zn, 7.4 wt% Ni, 2.8 wt% Si, 4.4 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% B, and the impurities are 0.02 wt% Pb and 0.01 wt% Fe; or

[0050] The scale-inhibiting alloy comprises the following components: 60.3 wt% Cu, 24.05 wt% Zn, 10.5 wt% Ni, 2.0 wt% Si, 3.1 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.02 wt% Fe; or

[0051] The scale-inhibiting alloy comprises the following components: 63.1 wt% Cu, 20.16 wt% Zn, 13.6 wt% Ni, 1.0 wt% Si, 2.1 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.02 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe.

[0052] In embodiments of this application, the unavoidable impurities include Pb and Fe, where Pb+Fe≤0.05wt% and Pb≤0.02wt%.

[0053] This application also provides a method for preparing the above-mentioned scale-inhibiting alloy, comprising the following steps:

[0054] (1) Weigh out Cu ingots, Zn ingots, Cu-Ni master alloy, Cu-P master alloy, fast-melting Si and modifier elements according to the composition of the scale inhibitor alloy;

[0055] (2) Place the Cu ingot and the Cu-Ni master alloy at the bottom of the induction furnace, add a slag remover for refining and cover with charcoal, heat to 1050-1150℃ until all the material is melted, and filter off the surface slag.

[0056] (3) Adjust the temperature to 1030-1080℃, add the Zn ingot to the material obtained in step (2) and quickly press it into the bottom of the furnace. Stir it thoroughly after it melts.

[0057] (4) Add the Cu-P master alloy and the fast-melting Si to the material obtained in step (3) and stir thoroughly to ensure that the alloy liquid composition is uniform.

[0058] (5) Add the aforementioned altering element to the material obtained in step (4), heat to 1080-1150℃, spray fire, stir and keep warm for 2-3 minutes;

[0059] (6) Keep the material obtained in step (5) at 1000-1050℃ for 10-20 minutes to homogenize the alloy and make the impurities float. Remove the scum and impurities.

[0060] (7) Heat the material obtained in step (6) to 1050-1100℃, remove it from the furnace, and pour it into a mold to form an alloy ingot. Cool it to obtain the final product.

[0061] In the embodiments of this application, in step (1), the purity of the Cu ingot is ≥99.90%, the purity of the Zn ingot is ≥99.95%, the Ni content in the Cu-Ni master alloy is 30%-40%, the P content in the Cu-P master alloy is 20%-30%, and the purity of the rapidly melting Si is ≥99.60%.

[0062] In the embodiments of this application, in step (2), the amount of the slag remover is 0.2%-0.5% of the weight of the melt.

[0063] In the embodiments of this application, in step (7), the mold is made of beryllium copper.

[0064] This application also provides a scale inhibitor sheet made of the above-described scale inhibitor alloy or a scale inhibitor alloy obtained by the above-described method.

[0065] In embodiments of this application, the scale inhibitor sheet is used in a water softener or scale inhibitor.

[0066] The materials used in the embodiments and comparative examples of this application are sourced from the following sources:

[0067] The Cu ingots were purchased from Ningbo Jintian Copper Industry, and the model was T2 copper busbar.

[0068] Zn ingots were purchased from Zhuzhou Smelter Torch, model Zn99.95;

[0069] The Cu-Ni master alloy was purchased from Shanghai Youfeng Alloy, and its model is CuNi35.

[0070] The Cu-P master alloy was purchased from Shanghai Youfeng Alloy, and its model is CuP25.

[0071] The fast-melting silicon was purchased from Guizhou Huangping Minhang Silicon Industry, and the model is Si99.90;

[0072] The modifiers B, Ti and Zr were purchased from Xuzhou Huazhong Aluminum Industry, and their grades were AlB5, AlTi75 and AlZr20, respectively.

[0073] The slag remover was purchased from Xuzhou Huazhong Aluminum Industry, model number HZ-WNQ.

[0074] Example 1

[0075] This embodiment provides a scale-inhibiting alloy comprising the following components: 57.2 wt% Cu, 24.36 wt% Zn, 14.1 wt% Ni, 1.6 wt% Si, 2.7 wt% P, 0.02 wt% of modifier elements, and 0.02 wt% of impurities, wherein the modifier elements are 0.005 wt% B, 0.01 wt% Ti, and 0.005 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe.

[0076] The scale-inhibiting alloy in this embodiment is prepared by the following method:

[0077] According to the composition of the scale-inhibiting alloy in this embodiment, weigh out Cu ingots, Zn ingots, Cu-Ni master alloy, Cu-P master alloy, fast-melting Si, and modifier elements; place Cu ingots and Cu-Ni master alloy at the bottom of an induction furnace, add a slag remover for refining and cover with charcoal, raise the temperature to 1050-1150℃ until all materials are melted, and filter off the surface slag; adjust the temperature to 1030-1080℃, add Zn ingots and quickly press them into the furnace bottom, and after melting, stir thoroughly and add Cu-P master alloy and fast-melting Si, stirring thoroughly to ensure uniform alloy composition; add modifier elements, raise the temperature to 1080-1150℃, spray, stir and hold for 2-3 minutes; hold at 1000-1050℃ for 10-20 minutes to homogenize the alloy and allow impurities to float, then remove the slag and impurities; raise the temperature to 1050-1100℃, pour into alloy ingots, and cool to obtain the final product.

[0078] Examples 2-5

[0079] Examples 2-5 provide a scale-inhibiting alloy, the composition of which is shown in Table 1. Furthermore, the scale-inhibiting alloys of Examples 2-5 were prepared according to the method of Example 1.

[0080] Comparative Examples 1-5

[0081] Comparative Examples 1-5 provide a scale-inhibiting alloy, the composition of which is shown in Table 1. Furthermore, the scale-inhibiting alloys of Comparative Examples 1-5 were prepared according to the method of Example 1.

[0082] Performance testing

[0083] The scale-inhibiting alloys prepared in Examples 1-5 and Comparative Examples 1-5 were weighed after the waste was removed to calculate the yield. The activation current and scale inhibition rate of the good products were tested to evaluate the processing performance. The results are shown in Table 1.

[0084] Yield rate is calculated as the ratio of the weight of good alloy ingots after scrap removal to the total weight of the alloy ingots. A higher yield rate indicates better melting performance, less raw material waste, and lower cost.

[0085] The activation current test was conducted using a self-made activation current test device. The scale inhibitor was connected to the circulating water device, the flow rate was set to 8L / min, the ohmmeter was set to the μA range, the positive electrode was connected to the end of the scale inhibitor, and the negative electrode was located in the water at a straight-line distance of 20cm from the positive electrode of the ohmmeter along the water flow direction. The ohmmeter reading was taken 10 minutes after the circulating water was turned on as the current magnitude.

[0086] The scale inhibition rate was tested using a self-made scale inhibition rate testing device. The experimental group consisted of a 10L (1g / L) calcium chloride aqueous solution added to a water tank. A water pump connected to the scale inhibitor was used for water circulation at a flow rate of 8L / min. Three stainless steel polished pads were placed in the tank, and their initial weight was recorded. The tank was heated in a water bath at a constant temperature of 80℃. The water pump was turned on, and the circulation lasted for 120 hours, with water added periodically to maintain a constant volume of 10L. After 120 hours, the pads were removed, dried, and weighed. The average weight gain of the three pads was calculated. A control group was also set up. Except for the absence of the scale inhibitor, the control group used the same setup, parameters, and procedures as the experimental group. The weight gain of the pads was calculated using the same method. The scale inhibition rate was calculated as: (Control group pad weight gain - Experimental group pad weight gain) / Control group pad weight gain * 100%.

[0087] Machining performance evaluation includes assessment of cutting performance and mechanical properties: Cutting performance is evaluated by cutting under the same machining conditions (speed: 570 r / min, feed: 0.2 mm / r, depth of cut: 2 mm on one side) and observing the chip morphology. Difficult chip breaking, large chips, and chip curls all indicate poor cutting performance. The mechanical property test method is in accordance with GB / T228.1-2010 "Metallic materials - Tensile testing - Part 1: Test method at room temperature", with a maximum load of 100 kN, and observing whether it will break or crack during the tensile process.

[0088] Table 1

[0089]

[0090] As can be seen from the data in Table 1, the low-cost scale-inhibiting alloys prepared by the composition formulations and preparation methods of Examples 1-5 of this application do not contain expensive elements, produce less waste, have a yield rate of ≥90%, and have low raw material and production costs; the activation current is stable between 70-90 μA, the scale inhibition rate is ≥80%, exhibiting good scale inhibition effect and good processing performance. Comparative Example 1, without the addition of P, showed an activation current of only 36 μA and a scale inhibition rate of only 56%; Comparative Example 2, with the addition of excessive P, resulted in strong cold brittleness and was prone to cracking; Comparative Example 3, with the addition of a large amount of Sn, showed severe component segregation, more smelting waste, low yield, and was prone to brittle fracture; Comparative Example 4, with a Zn content of less than 10%, had a severely insufficient ability to provide electrons to the negative electrode, resulting in low current and low scale inhibition rate; Comparative Example 5, without the addition of modifying elements, had coarse grains, reduced strength and plasticity, and poor mechanical properties.

[0091] Although the embodiments disclosed in this application are as described above, the content described is merely for the purpose of understanding this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A scale-inhibiting alloy, characterized in that, It contains the following components: 55wt%-70wt% Cu, 15wt%-30wt% Zn, 5wt%-15wt% Ni, 0.5wt%-3wt% Si, 1wt%-5wt% P, 0.001wt%-0.05wt% of a modifier element, with the balance being unavoidable impurities, wherein the modifier element is one or more of B, Ti and Zr.

2. The scale-inhibiting alloy according to claim 1, wherein... The scale-inhibiting alloy comprises the following components: 55wt%-60wt% Cu, 20wt%-25wt% Zn, 10wt%-15wt% Ni, 1wt%-2wt% Si, 1wt%-3wt% P, 0.001wt%-0.03wt% of a modifying element, with the balance being unavoidable impurities. The modifying element is one or more of B, Ti, and Zr; or The scale-inhibiting alloy comprises the following components: 57wt%-58wt% Cu, 24wt%-25wt% Zn, 14wt%-15wt% Ni, 1.5wt%-1.8wt% Si, 2.5wt%-3wt% P, 0.01wt%-0.03wt% of a modifier element, with the balance being unavoidable impurities. The modifier element is one or more of B, Ti, and Zr.

3. The scale-inhibiting alloy according to claim 1, wherein... The scale-inhibiting alloy comprises the following components: 57.2 wt% Cu, 24.36 wt% Zn, 14.1 wt% Ni, 1.6 wt% Si, 2.7 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.005 wt% B, 0.01 wt% Ti, and 0.005 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or The scale-inhibiting alloy comprises the following components: 55.6 wt% Cu, 28.84 wt% Zn, 13.5 wt% Ni, 0.7 wt% Si, 1.3 wt% P, 0.04 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.02 wt% B and 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe; or The scale-inhibiting alloy comprises the following components: 68.4 wt% Cu, 16.95 wt% Zn, 7.4 wt% Ni, 2.8 wt% Si, 4.4 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% B, and the impurities are 0.02 wt% Pb and 0.01 wt% Fe; or The scale-inhibiting alloy comprises the following components: 60.3 wt% Cu, 24.05 wt% Zn, 10.5 wt% Ni, 2.0 wt% Si, 3.1 wt% P, 0.02 wt% of a modifier element, and 0.03 wt% of impurities, wherein the modifier element is 0.02 wt% Ti, and the impurities are 0.01 wt% Pb and 0.02 wt% Fe; or The scale-inhibiting alloy comprises the following components: 63.1 wt% Cu, 20.16 wt% Zn, 13.6 wt% Ni, 1.0 wt% Si, 2.1 wt% P, 0.02 wt% of a modifier element, and 0.02 wt% of impurities, wherein the modifier element is 0.02 wt% Zr, and the impurities are 0.01 wt% Pb and 0.01 wt% Fe.

4. The scale-inhibiting alloy according to claim 1 or 2, wherein, The unavoidable impurities include Pb and Fe, where Pb+Fe≤0.05wt% and Pb≤0.02wt%.

5. A method for preparing a scale-inhibiting alloy according to any one of claims 1-4, characterized in that, Includes the following steps: (1) Weigh out Cu ingots, Zn ingots, Cu-Ni master alloy, Cu-P master alloy, fast-melting Si and modifier elements according to the composition of the scale inhibitor alloy; (2) Place the Cu ingot and the Cu-Ni master alloy at the bottom of the induction furnace, add a slag remover for refining and cover with charcoal, heat to 1050-1150℃ until all the materials are melted, and filter out the surface slag. (3) Adjust the temperature to 1030-1080℃, add the Zn ingot to the material obtained in step (2) and quickly press it into the bottom of the furnace. Stir it thoroughly after it melts. (4) Add the Cu-P master alloy and the fast-melting Si to the material obtained in step (3) and stir thoroughly to ensure that the alloy liquid composition is uniform; (5) Add the modified element to the material obtained in step (4), heat to 1080-1150℃, spray fire, stir and keep warm for 2-3 minutes; (6) Keep the material obtained in step (5) at 1000-1050℃ for 10-20 minutes to homogenize the alloy and make the impurities float. Remove the scum and impurities. (7) Heat the material obtained in step (6) to 1050-1100℃, remove it from the furnace, and pour it into a mold to form an alloy ingot. Cool it to obtain the final product.

6. The method according to claim 5, wherein, In step (1), the purity of the Cu ingot is ≥99.90%, the purity of the Zn ingot is ≥99.95%, the Ni content in the Cu-Ni master alloy is 30%-40%, the P content in the Cu-P master alloy is 20%-30%, and the purity of the rapidly melting Si is ≥99.60%.

7. The method according to claim 5, wherein, In step (2), the amount of the slag remover is 0.2%-0.5% of the weight of the melt.

8. The method according to claim 5, wherein, In step (7), the mold is made of beryllium copper.

9. A scale inhibitor sheet made of a scale inhibitor alloy according to any one of claims 1-4 or a scale inhibitor alloy obtained by any one of claims 5-8.

10. The scale inhibitor sheet according to claim 9, wherein, The scale inhibitor sheet is used in water softeners or scale inhibitors.

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