Wear-resistant aluminum alloy wallboard and preparation method thereof

Abstract

The invention discloses a wear-resistant aluminum alloy wallboard and a preparation method thereof, and relates to the technical field of metal surface treatment.The preparation method comprises the following operation steps that firstly, an aluminum alloy profiled bar with a first inserting part is sequentially subjected to ultrasonic degreasing and oil removing, water washing, drying and aging treatment, and an aluminum alloy profiled bar A is obtained; 2, the aluminum alloy profiled bar A is placed in the electrolyte A to be subjected to micro-arc oxidation treatment for 20-25 min, water washing and drying are conducted, then the aluminum alloy profiled bar A is placed in the electrolyte B to be subjected to anodic oxidation treatment for 40-50 min, and a wear-resistant aluminum alloy profiled bar is obtained and serves as a first wall plate; 3, a second wall plate with a second inserting part is connected with the first wall plate in a sliding mode, and a cross-shaped sliding structure is formed; and thus, the wear-resistant aluminum alloy wallboard is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface treatment, in particular to a wear-resistant aluminum alloy wallboard and a preparation method thereof. Background Art

[0002] Aluminum alloy wall panels are widely used in architectural decoration due to their lightweight, corrosion-resistant, and easy-to-process advantages. However, in certain environments, such as those with high foot traffic, high friction, or frequent mechanical collisions, traditional aluminum alloy wall panels often lack the required wear resistance.

[0003] In order to solve the wear resistance problem of aluminum alloy wall panels, some surface treatment methods are usually adopted in the existing technology, such as anodizing, spraying wear-resistant coating, micro-arc oxidation, etc.; anodizing can form a hard oxide film on the surface of aluminum alloy, improving its wear resistance and corrosion resistance, but for some harsh use environments, the wear resistance of simple anodized film still needs to be further improved; although spraying wear-resistant coating can improve the wear resistance of wall panels to a certain extent, the adhesion and durability of the coating may be affected by many factors, such as the bonding strength between the coating and the substrate, ambient temperature and humidity, etc. After long-term use, the coating may fall off, peel off, etc.; micro-arc oxidation is a surface treatment method developed on the basis of anodizing. It has a strong bond with the aluminum alloy substrate and is not easy to fall off, but as people's requirements for the wear resistance of aluminum alloy wall panels increase, the wear resistance of simple micro-arc oxidation also needs to be further improved.

[0004] In summary, it is of great significance to prepare an aluminum alloy wall panel with better wear resistance. Summary of the Invention

[0005] The object of the present invention is to provide a wear-resistant aluminum alloy wallboard and a preparation method thereof, so as to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for preparing a wear-resistant aluminum alloy wallboard, characterized by comprising the following steps:

[0008] Step 1: subjecting the aluminum alloy profile having the first plug-in portion to ultrasonic degreasing, water washing, drying, and aging treatment in sequence to obtain aluminum alloy profile A;

[0009] Step 2: The aluminum alloy profile A is placed in electrolyte A for micro-arc oxidation treatment for 20 to 25 minutes, washed with water, dried, and then placed in electrolyte B for anodization treatment for 40 to 50 minutes to obtain a wear-resistant aluminum alloy profile, which is used as the first wall panel;

[0010] Step 3: Slidingly connect the second wall panel with the second plug-in portion to the first wall panel to form a cross sliding structure; thereby obtaining a wear-resistant aluminum alloy wall panel.

[0011] A more optimized method for preparing a wear-resistant aluminum alloy wall panel, wherein the material of the second wall panel includes one of metal and plastic; it can be the same material as the first wall panel, or it can be high-strength PVC, PP and other materials.

[0012] The most optimized process conditions for the aging treatment are: temperature of 160-180°C, time of 6-8 hours; the process conditions for the micro-arc oxidation treatment are: current density of 10-13A / dm 2 , frequency is 300-500 Hz, duty cycle is 15-30%; the process conditions of the anodizing are: voltage is 70-90 V, temperature is 30-40°C.

[0013] More optimally, the raw materials of the electrolyte A include the following components: 10-30 g / L sodium hydroxide, 8-12 g / L Na2SiO3, 4-8 g / L modified gluconic acid, and 2-10 g / L phytic acid.

[0014] The more optimized preparation method of the modified gluconic acid is as follows: (1) adding nanographene to deionized water for ultrasonic dispersion, adding gluconic acid and sodium hydroxide aqueous solution dropwise, stirring at room temperature for 4 to 5 hours, washing, and drying to obtain graphene-gluconic acid; (2) adding EDC and imidazole-4,5-dicarboxylic acid to a phosphate buffer solution and uniformly mixing to obtain a mixed solution A and a mixed solution B; adding graphene-gluconic acid to a phosphate buffer solution, ultrasonic dispersion, adding mixed solution A dropwise and ultrasonically for 10 to 15 minutes, adding mixed solution B and ultrasonically for 30 to 40 minutes, shaking it at 22 to 25° C. for 18 to 22 hours, filtering, washing with phosphate buffer solution, and freeze-drying to obtain modified gluconic acid.

[0015] More optimally, the raw materials of the graphene-gluconic acid include the following components: by mass, 1 to 2 parts of nanographene, 0.6 to 1.2 parts of gluconic acid, and 10 to 12 parts of sodium hydroxide aqueous solution; the concentration of the sodium hydroxide aqueous solution is 0.05 g / mL; the raw materials of the modified gluconic acid include the following components: by mass, 0.02 to 0.04 parts of EDC, 2 to 3 parts of imidazole-4,5-dicarboxylic acid, 1 to 1.2 parts of graphene-gluconic acid, and 15 to 25 parts of phosphate buffer solution; the phosphate buffer solution contains 0.1 to 0.2 mol / L NaCl, and the pH is 7.0 to 7.5.

[0016] More optimally, the raw materials of the electrolyte B include the following components: 12-18 g / L sulfuric acid, 2-5 g / L modified polypyrrole, 0.2-0.8 g / L sodium lauryl sulfate, 0.5-0.8 g / L ethylenediaminetetraacetic acid, and 1.5-2 g / L sodium citrate; the pH of the electrolyte B is 1.8-2.0.

[0017] A more optimized preparation method of the modified polypyrrole is as follows: adding ammonium persulfate to a 1-2 mol hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; adding nano zirconium dioxide to the 1-2 mol hydrochloric acid solution and ultrasonically dispersing the mixture; adding pyrrole and pyrrole-2-sulfonic acid in an ice-water bath and uniformly mixing the mixture; adding the oxidant hydrochloric acid solution dropwise for 1-2 hours; reacting the mixture for 10-14 hours; washing the mixture; and drying the mixture to obtain the modified polypyrrole.

[0018] More optimally, the raw materials of the modified polypyrrole include the following components: by mass, 3 to 4 parts of ammonium persulfate, 1 to 3 parts of nano zirconium dioxide, 6.7 to 7 parts of pyrrole, 2 to 3 parts of pyrrole-2-sulfonic acid, and 30 to 50 parts of hydrochloric acid solution.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention sequentially subjects an aluminum alloy profile having a first plug-in portion to aging treatment, micro-arc oxidation, and anodizing to obtain a wear-resistant aluminum alloy profile, which is used as a first wall panel; the profile is slidably connected to a second wall panel having a second plug-in portion to form a cross-sliding structure, thereby obtaining a wear-resistant aluminum alloy wall panel.

[0021] In this solution, aging treatment will eliminate residual stress from machining, reduce the risk of film cracking during micro-arc oxidation, and increase the roughness, thereby enhancing the mechanical bite and film thickness of the film. The micro-arc oxidation electrolyte is composed of sodium hydroxide, gluconic acid, and phytic acid. Phytic acid refines the film grains during the micro-arc oxidation process, helping to improve the film's hardness, wear resistance, and corrosion resistance.

[0022] Although the carboxyl groups in the gluconic acid molecule can form complexes with the metal ions in the aluminum alloy matrix, reducing the loss of metal ions and thus inhibiting the corrosion of the matrix; however, the carboxyl content of gluconic acid is relatively low, so its effect is relatively poor; in order to improve its performance; in the scheme, it is modified by nanographene and imidazole-4,5-dicarboxylic acid to increase the carboxyl content on its surface, among which nanographene can improve the wear resistance and strength of the aluminum alloy; and the imidazole group and multiple carboxyl groups introduced therein can prepare for the later anodizing; the imidazole group has certain corrosion inhibition properties, which reduces the erosion of the electrolyte on the metal matrix and improves the bonding strength between the oxide film and the matrix.

[0023] In order to further improve the strength and corrosion resistance of aluminum alloy wall panels, the aluminum alloy wall panels after micro-arc oxidation are anodized. In order to improve the performance, polypyrrole and nano-zirconium dioxide are added to the anodizing electrolyte.

[0024] Among them, polypyrrole has certain self-lubricating properties. During the friction process, the sliding and deformation of the polypyrrole molecular chain can play a lubricating role, thereby reducing the friction coefficient between the aluminum alloy wall panel surface and the friction pair; and nano-zirconium dioxide nano-zirconium dioxide has good chemical stability. Its nano-scale size can effectively fill the pores on the surface of the material, improve the sealing and protective properties of the material, and can be used as a sealing additive. The zirconium ion has a suitable coordination configuration and empty orbital, and can coordinate with the nitrogen atoms in the carboxyl and imidazole groups to form a stable complex. The addition of the chelating agent ethylenediaminetetraacetic acid (EDTA) makes it easier to react with the carboxyl and imidazole groups, enhancing the bonding force with the micro-arc oxidation layer, thereby improving the strength and wear resistance.

[0025] However, polypyrrole has poor dispersibility in water. Therefore, in the scheme, pyrrole and pyrrole-2-sulfonic acid are copolymerized in an acidic dispersion of nano-zirconium dioxide to obtain modified polypyrrole, thereby improving the dispersibility of polypyrrole in water and alleviating the agglomeration of nano-zirconium dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the wear-resistant aluminum alloy wall panel;

[0027] Figure 2 This is a front view of the wear-resistant aluminum alloy wallboard prepared in Example 2;

[0028] Figure 3 This is a side view of the wear-resistant aluminum alloy wall panel prepared in Example 2. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The preparation method of modified gluconic acid is as follows: (1) adding 1.2 parts of nanographene to deionized water for ultrasonic dispersion, adding 0.8 parts of gluconic acid and 10 parts of sodium hydroxide aqueous solution (0.05 g / mL) dropwise, stirring at room temperature for 4 hours, washing, and drying to obtain graphene-gluconic acid; (2) adding 0.034 parts of EDC and 2.3 parts of imidazole-4,5-dicarboxylic acid to 10 parts of phosphate buffer solution (phosphate buffer solution has a pH of 7.2 and contains 0.15 mol / L NaCl) and mixing them uniformly to obtain mixed solution A and mixed solution B; adding 1 part of graphene-gluconic acid to 15 parts of phosphate buffer solution, ultrasonic dispersion, adding mixed solution A dropwise and ultrasonically for 10 minutes, adding mixed solution B and ultrasonically for 35 minutes, shaking it at 25°C for 20 hours, filtering, washing with phosphate buffer solution, and freeze-drying to obtain modified gluconic acid.

[0031] The preparation method of the modified polypyrrole comprises the following steps: adding 3.2 parts of ammonium persulfate to 10 parts of a 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; adding 1.2 nanometer zirconium dioxide to 20 parts of a 1 mol hydrochloric acid solution and ultrasonically dispersing the mixture; adding 6.7 parts of pyrrole and 2 parts of pyrrole-2-sulfonic acid in an ice-water bath and uniformly mixing the mixture; dripping the oxidant hydrochloric acid solution over a period of 2 hours; reacting the mixture for 12 hours; washing the mixture; and drying the mixture to obtain the modified polypyrrole.

[0032] The metal element composition of the following aluminum alloy profile is the metal component of 6063 aluminum alloy; the wear-resistant aluminum alloy profile obtained below is used as the first wall panel, and the second wall panel with the second plug-in portion is slidably connected to the first wall panel to form a cross sliding structure; thereby, the wear-resistant aluminum alloy wall panel is obtained, such as Figure 1 shown.

[0033] Example 1: The preparation method of wear-resistant aluminum alloy profile is as follows:

[0034] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0035] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 , the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0036] Among them, the raw materials of electrolyte A include the following components: 20g / L sodium hydroxide, 10g / LNa2SiO3, 4g / L modified gluconic acid, and 3g / L phytic acid; the raw materials of electrolyte B include the following components: 12g / L sulfuric acid, 2g / L modified polypyrrole, 0.5g / L sodium lauryl sulfate, 0.5g / L ethylenediaminetetraacetic acid, and 1.5g / L sodium citrate; the pH of electrolyte B is 1.8.

[0037] Example 2: The preparation method of wear-resistant aluminum alloy profile is as follows:

[0038] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0039] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 , the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0040] Among them, the raw materials of electrolyte A include the following components: 20g / L sodium hydroxide, 10g / LNa2SiO3, 7g / L modified gluconic acid, and 6g / L phytic acid; the raw materials of electrolyte B include the following components: 15g / L sulfuric acid, 3.2g / L modified polypyrrole, 0.5g / L sodium lauryl sulfate, 0.7g / L ethylenediaminetetraacetic acid, and 1.5g / L sodium citrate; the pH of electrolyte B is 1.8.

[0041] Example 3: The preparation method of wear-resistant aluminum alloy profile is as follows:

[0042] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0043] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2, the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0044] Among them, the raw materials of electrolyte A include the following components: 20g / L sodium hydroxide, 10g / LNa2SiO3, 5g / L modified gluconic acid, and 10g / L phytic acid; the raw materials of electrolyte B include the following components: 15g / L sulfuric acid, 5g / L modified polypyrrole, 0.5g / L sodium lauryl sulfate, 0.7g / L ethylenediaminetetraacetic acid, and 1.5g / L sodium citrate; the pH of electrolyte B is 1.8.

[0045] Comparative Example 1 is based on Example 2, except that an aging treatment is performed;

[0046] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and removing oil for 10 minutes, washing with water, and drying to obtain aluminum alloy profile A;

[0047] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 , the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0048] Among them, the raw materials of electrolyte A include the following components: 20g / L sodium hydroxide, 10g / LNa2SiO3, 7g / L modified gluconic acid, and 6g / L phytic acid; the raw materials of electrolyte B include the following components: 15g / L sulfuric acid, 3.2g / L modified polypyrrole, 0.5g / L sodium lauryl sulfate, 0.7g / L ethylenediaminetetraacetic acid, and 1.5g / L sodium citrate; the pH of electrolyte B is 1.8.

[0049] Comparative Example 2 is based on Example 2, except that imidazole-4,5-dicarboxylic acid is not introduced into the modified gluconic acid;

[0050] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0051] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 , the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0052] The raw materials of electrolyte A include the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid; the raw materials of electrolyte B include the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium lauryl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; the pH of electrolyte B is 1.8;

[0053] The preparation method of modified gluconic acid is as follows: (1) adding 1.2 parts of nanographene to deionized water for ultrasonic dispersion, adding 0.8 parts of gluconic acid and 10 parts of sodium hydroxide aqueous solution (0.05 g / mL) dropwise, stirring at room temperature for 4 hours, washing, and drying to obtain graphene-gluconic acid; (2) adding 0.034 parts of EDC to 10 parts of phosphate buffer solution (phosphate buffer solution has a pH of 7.2 and contains 0.15 mol / L NaCl) and uniformly mixing to obtain mixed solution A; adding 1 part of graphene-gluconic acid to 15 parts of phosphate buffer solution, ultrasonic dispersion, adding mixed solution A dropwise and ultrasonically for 35 minutes, shaking it at 25°C for 20 hours, filtering, washing with phosphate buffer solution, and freeze-drying to obtain modified gluconic acid.

[0054] Comparative Example 3 is based on Example 2, except that pyrrole-2-sulfonic acid is not introduced into the modified polypyrrole;

[0055] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0056] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2, the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0057] The raw materials of electrolyte A include the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid; the raw materials of electrolyte B include the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium lauryl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; the pH of electrolyte B is 1.8;

[0058] The preparation method of modified polypyrrole comprises the following steps: adding 3.2 parts of ammonium persulfate to 10 parts of 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; adding 1.2 nanometer zirconium dioxide to 20 parts of 1 mol hydrochloric acid solution for ultrasonic dispersion; adding 6.7 parts of pyrrole in an ice-water bath and uniformly mixing; adding the oxidant hydrochloric acid solution dropwise for 2 hours, reacting for 12 hours, washing, and drying to obtain the modified polypyrrole.

[0059] Comparative Example 4 is based on Example 2, except that hot water sealing treatment is performed directly after micro-arc oxidation;

[0060] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0061] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 The frequency was set to 500 Hz, the duty cycle was set to 20%, micro-arc oxidation was performed for 20 minutes, the material was washed and dried, and then placed in deionized water at 100°C for hot water sealing for 30 minutes to obtain a wear-resistant aluminum alloy profile, which was used as the first wall panel;

[0062] The raw materials of electrolyte A include the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid.

[0063] Comparative Example 5 is based on Example 2, except that nano zirconium dioxide is not introduced into the modified polypyrrole;

[0064] Step 1: placing the aluminum alloy profile having the first plug-in portion in an aqueous solution containing 5 wt% NaOH and 3 wt% Na2CO3 at a temperature of 50°C, ultrasonically degreasing and deoiling for 10 minutes, washing with water, drying, and aging treatment at 170°C for 6 hours to obtain aluminum alloy profile A;

[0065] Step 2: Place aluminum alloy profile A in electrolyte A, with aluminum alloy profile A as the anode and stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm 2 , the frequency is set to 500 Hz, the duty cycle is set to 20%, micro-arc oxidation is performed for 20 minutes, washed with water, dried, and then placed in electrolyte B at 35°C, using it as the anode and the platinum electrode as the cathode, setting the voltage to 80 V, anodizing for 40 minutes, taking it out and washing it to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard;

[0066] The raw materials of electrolyte A include the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid; the raw materials of electrolyte B include the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium lauryl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; the pH of electrolyte B is 1.8;

[0067] The preparation method of the modified polypyrrole comprises the following steps: adding 3.2 parts of ammonium persulfate to 10 parts of a 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; adding 6.7 parts of pyrrole and 2 parts of pyrrole-2-sulfonic acid to 20 parts of the 1 mol / L hydrochloric acid solution in an ice-water bath, uniformly mixing, dripping the oxidant hydrochloric acid solution over 2 hours, reacting for 12 hours, washing, and drying to obtain the modified polypyrrole.

[0068] Detection test: The wear-resistant aluminum alloy profiles prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were subjected to friction and wear tests using an HT-600 high-temperature friction and wear testing machine. The mass before and after wear was recorded, and the difference in mass before and after wear was the mass loss. The self-corrosion potential of Examples 1 to 3 and Comparative Examples 1 to 5 was tested using a potentiodynamic polarization curve.

[0069]

[0070]

[0071] Table 1

[0072] Conclusion: Comparative Example 1 is based on Example 2, with the difference that aging treatment is performed, which reduces the bonding performance between the aluminum alloy profile and the micro-arc oxidation layer, thereby reducing the performance of the wear-resistant aluminum alloy profile; Comparative Example 2 is based on Example 2, with the difference that imidazole-4,5-dicarboxylic acid is not introduced into the modified gluconic acid, which reduces the coordination performance of the modified gluconic acid, resulting in reduced interface bonding between the micro-arc oxidation layer and the aluminum alloy profile and the anodized layer, thus affecting the performance of the wear-resistant aluminum alloy profile; Comparative Example 3 is based on Example 2, with the difference that pyrrole-2-sulfonic acid is not introduced into the modified polypyrrole, which reduces the dispersibility of the polypyrrole, thereby reducing the performance of the wear-resistant aluminum alloy profile; Comparative Example 4 is based on Example 2, with the difference that hot water sealing treatment is directly performed after micro-arc oxidation, thereby reducing the performance of the wear-resistant aluminum alloy profile; Comparative Example 5 is based on Example 2, with the difference that nano-zirconium dioxide is not introduced into the modified polypyrrole, thereby reducing the performance of the wear-resistant aluminum alloy profile.

[0073] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a wear-resistant aluminum alloy wallboard, characterized in that: The following steps are included: Step 1: subjecting the aluminum alloy profile having the first plug-in portion to ultrasonic degreasing, water washing, drying, and aging treatment in sequence to obtain aluminum alloy profile A; Step 2: The aluminum alloy profile A is placed in electrolyte A for micro-arc oxidation treatment for 20 to 25 minutes, washed with water, dried, and then placed in electrolyte B for anodization treatment for 40 to 50 minutes to obtain a wear-resistant aluminum alloy profile, which is used as the first wall panel; Step 3: Slidingly connect the second wall panel with the second plug-in portion to the first wall panel to form a cross sliding structure; In this way, wear-resistant aluminum alloy wall panels are obtained.

2. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 1, characterized in that: The process conditions of the aging treatment are: temperature of 160-180°C, time of 6-8 hours; the process conditions of the micro-arc oxidation treatment are: current density of 10-13A / dm 2 , frequency is 300-500 Hz, duty cycle is 15-30%; the process conditions of the anodizing are: voltage is 70-90 V, temperature is 30-40°C.

3. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 1, characterized in that: The raw materials of the electrolyte A include the following components: 10-30 g / L sodium hydroxide, 8-12 g / L Na2SiO3, 4-8 g / L modified gluconic acid, and 2-10 g / L phytic acid.

4. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 3, characterized in that: The preparation method of the modified gluconic acid is as follows: (1) adding nanographene to deionized water for ultrasonic dispersion, adding gluconic acid and sodium hydroxide aqueous solution dropwise, stirring at room temperature for 4 to 5 hours, washing, and drying to obtain graphene-gluconic acid; (2) EDC and imidazole-4,5-dicarboxylic acid are added to a phosphate buffer solution and uniformly mixed to obtain a mixed solution A and a mixed solution B; graphene-gluconic acid is added to the phosphate buffer solution, ultrasonically dispersed, the mixed solution A is added dropwise and ultrasonically dispersed for 10 to 15 minutes, the mixed solution B is added and ultrasonically dispersed for 30 to 40 minutes, and the mixture is shaken at 22 to 25° C. for 18 to 22 hours, filtered, washed with a phosphate buffer solution, and freeze-dried to obtain modified gluconic acid.

5. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 4, characterized in that: The raw materials of the graphene-gluconic acid include the following components: 1 to 2 parts of nanographene, 0.6 to 1.2 parts of gluconic acid, and 10 to 12 parts of sodium hydroxide aqueous solution, calculated by mass; the concentration of the sodium hydroxide aqueous solution is 0.05 g / mL; the raw materials of the modified gluconic acid include the following components: 0.02 to 0.04 parts of EDC, 2 to 3 parts of imidazole-4,5-dicarboxylic acid, 1 to 1.2 parts of graphene-gluconic acid, and 15 to 20 parts of phosphate buffer solution, calculated by mass; the phosphate buffer solution contains 0.1 to 0.2 mol / L NaCl and has a pH of 7.0 to 7.

5.

6. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 1, characterized in that: The raw materials of the electrolyte B include the following components: 12-18 g / L sulfuric acid, 2-5 g / L modified polypyrrole, 0.2-0.8 g / L sodium lauryl sulfate, 0.5-0.8 g / L ethylenediaminetetraacetic acid, and 1.5-2 g / L sodium citrate; the pH of the electrolyte B is 1.8-2.

0.

7. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 6, characterized in that: The preparation method of the modified polypyrrole comprises the following steps: adding ammonium persulfate to a 1-2 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; adding nano zirconium dioxide to the 1-2 mol hydrochloric acid solution for ultrasonic dispersion; adding pyrrole and pyrrole-2-sulfonic acid in an ice-water bath for uniform mixing; dripping the oxidant hydrochloric acid solution over a period of 1-2 hours; reacting for 10-14 hours; washing, and drying to obtain the modified polypyrrole.

8. The method for preparing a wear-resistant aluminum alloy wallboard according to claim 7, characterized in that: The raw materials of the modified polypyrrole include the following components: 3-4 parts of ammonium persulfate, 1-3 parts of nano zirconium dioxide, 6.7-7 parts of pyrrole, 2-3 parts of pyrrole-2-sulfonic acid, and 30-50 parts of hydrochloric acid solution, calculated by mass.

9. A wear-resistant aluminum alloy wallboard prepared according to the method for preparing a wear-resistant aluminum alloy wallboard according to any one of claims 1 to 8.

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