Wear-resistant aluminum alloy wallboard and method of making same

Abstract

The application discloses a wear-resistant aluminum alloy wallboard and a preparation method thereof, and relates to the technical field of metal surface treatment, and comprises the following operation steps: step 1: an aluminum alloy profile with a first plug-in part is subjected to ultrasonic degreasing and oil removal, washing, drying and aging treatment in sequence to obtain an aluminum alloy profile A; step 2: the aluminum alloy profile A is subjected to micro-arc oxidation treatment in electrolyte A for 20-25 minutes, washed, dried, and then subjected to anodic oxidation treatment in electrolyte B for 40-50 minutes to obtain a wear-resistant aluminum alloy profile which serves as a first wallboard; and step 3: a second wallboard with a second plug-in part is slidably connected with the first wallboard to form a cross sliding structure, thereby obtaining the wear-resistant aluminum alloy wallboard.

Description

Technical Field

[0001] This invention relates to the field of metal surface treatment technology, specifically to a wear-resistant aluminum alloy wall panel and its preparation method. Background Technology

[0002] Aluminum alloy wall panels are widely used in the field of building decoration due to their advantages such as light weight, corrosion resistance, and ease of processing. However, in some specific environments, such as places with high traffic, high friction, or frequent mechanical collisions, the wear resistance of traditional aluminum alloy wall panels often fails to meet the requirements.

[0003] To address the wear resistance issue of aluminum alloy wall panels, existing technologies typically employ surface treatment methods such as anodizing, spraying wear-resistant coatings, and micro-arc oxidation. Anodizing forms a hard oxide film on the aluminum alloy surface, improving its wear resistance and corrosion resistance. However, for harsh operating environments, the wear resistance of a simple anodized film still needs further improvement. While spraying wear-resistant coatings can improve the wear resistance of wall panels to some extent, the adhesion and durability of the coating can be affected by various factors, such as the bonding strength between the coating and the substrate, ambient temperature, and humidity. After long-term use, the coating may peel off or flake. Micro-arc oxidation is a surface treatment method developed based on anodizing. It bonds firmly to the aluminum alloy substrate and is not easily detached. However, as the requirements for wear resistance of aluminum alloy wall panels increase, the wear resistance of simple micro-arc oxidation also needs further improvement.

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

[0005] The purpose of this invention is to provide a wear-resistant aluminum alloy wall panel and its preparation method to solve the problems raised in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

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

[0008] Step 1: The aluminum alloy profile with the first insertion part is subjected to ultrasonic degreasing, water washing, drying and aging treatment in sequence to obtain aluminum alloy profile A;

[0009] Step 2: Place the aluminum alloy profile A in electrolyte A for micro-arc oxidation treatment for 20-25 minutes, wash with water and dry, and then place it in electrolyte B for anodizing treatment for 40-50 minutes to obtain wear-resistant aluminum alloy profile, which is used as the first wall panel.

[0010] Step 3: Slidably connect the second wall panel with the second insertion part to the first wall panel to form a cross sliding structure; thus 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 a high-strength PVC, PP or other materials.

[0012] The optimized aging treatment process conditions are: temperature 160–180℃, time 6–8 hours; the micro-arc oxidation treatment process conditions are: current density 10–13 A / dm³. 2 The frequency is 300-500Hz, and the duty cycle is 15-30%; the anodizing process conditions are: voltage 70-90V, temperature 30-40℃.

[0013] In a more optimized form, the raw materials of 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] A more optimized method for preparing the modified gluconic acid is as follows: (1) Add nano-graphene to deionized water and disperse it by ultrasonication, add gluconic acid and sodium hydroxide aqueous solution dropwise, stir at room temperature for 4-5 hours, wash and dry to obtain graphene-gluconic acid; (2) Add EDC and imidazole-4,5-dicarboxylic acid to phosphate buffer solution and mix evenly to obtain mixed solution A and mixed solution B; add graphene-gluconic acid to phosphate buffer solution, disperse it by ultrasonication, add mixed solution A dropwise and sonicate for 10-15 minutes, add mixed solution B and sonicate for 30-40 minutes, shake at 22-25℃ for 18-22 hours, filter, wash with phosphate buffer solution, freeze dry to obtain modified gluconic acid.

[0015] In a more optimized form, the raw material for the graphene-gluconic acid comprises the following components: by mass parts, 1-2 parts of nano-graphene, 0.6-1.2 parts of gluconic acid, and 10-12 parts of sodium hydroxide aqueous solution; the concentration of the sodium hydroxide aqueous solution is 0.05 g / mL; the raw material for the modified gluconic acid comprises the following components: by mass parts, 0.02-0.04 parts of EDC, 2-3 parts of imidazole-4,5-dicarboxylic acid, 1-1.2 parts of graphene-gluconic acid, and 15-25 parts of phosphate buffer solution; the phosphate buffer solution contains 0.1-0.2 mol / L NaCl and has a pH of 7.0-7.5.

[0016] In a more optimized form, the raw materials of 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 dodecyl sulfate, 0.5-0.8 g / L ethylenediaminetetraacetic acid, and 1.5-2 g / L sodium citrate; the pH of electrolyte B is 1.8-2.0.

[0017] A more optimized method for preparing the modified polypyrrole is as follows: ammonium persulfate is added to 1-2 mol of hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; nano-zirconia is added to 1-2 mol of hydrochloric acid solution and ultrasonically dispersed; under ice-water bath conditions, pyrrole and pyrrole-2-sulfonic acid are added and mixed evenly; the oxidant hydrochloric acid solution is added dropwise over 1-2 hours; the reaction is carried out for 10-14 hours; the mixture is washed and dried to obtain the modified polypyrrole.

[0018] In a more optimized form, the modified polypyrrole raw material comprises the following components: by mass parts, 3-4 parts ammonium persulfate, 1-3 parts nano-zirconia, 6.7-7 parts pyrrole, 2-3 parts pyrrole-2-sulfonic acid, and 30-50 parts hydrochloric acid solution.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The present invention involves sequentially subjecting an aluminum alloy profile with a first insertion part to aging treatment, micro-arc oxidation, and anodizing to obtain a wear-resistant aluminum alloy profile, which is used as a first wall panel; it is then slidably connected to a second wall panel with a second insertion part to form a cross sliding structure; thus obtaining a wear-resistant aluminum alloy wall panel.

[0021] In this solution, aging treatment will eliminate residual stress from processing, reduce the risk of film cracking during micro-arc oxidation, and increase roughness, thereby enhancing the mechanical bonding and thickness of the film. The micro-arc oxidation electrolyte is composed of sodium hydroxide, gluconic acid, and phytic acid. Phytic acid refines the grain size of the film during micro-arc oxidation, which helps to improve the hardness, wear resistance, and corrosion resistance of the film.

[0022] Although the carboxyl groups in gluconic acid molecules can form complexes with metal ions in the aluminum alloy matrix, reducing the loss of metal ions and thus inhibiting the corrosion of the matrix, the carboxyl content of gluconic acid is relatively low, resulting in a poor effect. To improve its performance, the proposed method modifies it with nano-graphene and imidazole-4,5-dicarboxylic acid to increase the carboxyl content on its surface. Nano-graphene can improve the wear resistance and strength of the aluminum alloy, and the imidazole groups and multiple carboxyl groups introduced therein can prepare for subsequent anodizing. Imidazole groups have certain corrosion inhibition properties, reducing the erosion of the metal matrix by the electrolyte and improving the adhesion between the oxide film and the matrix.

[0023] To further improve the strength and corrosion resistance of aluminum alloy wall panels, the solution involves anodizing the micro-arc-oxidized aluminum alloy wall panels. To enhance performance, polypyrrole and nano-zirconia are added to the anodizing electrolyte.

[0024] Among them, polypyrrole has certain self-lubricating properties. During the friction process, the sliding and deformation of polypyrrole molecular chains can play a lubricating role, thereby reducing the friction coefficient between the aluminum alloy wall panel surface and the friction pair. Nano-zirconia has good chemical stability. Its nano-sized structure can effectively fill the pores on the material surface, improve the sealing and protective performance of the material, and can be used as a pore-sealing additive. Zirconium ions have suitable coordination configurations and empty orbitals, which can coordinate with nitrogen atoms in carboxyl and imidazole groups to form stable complexes. The addition of chelating agent ethylenediaminetetraacetic acid (EDTA) makes it easier for it to coordinate with carboxyl and imidazole groups, enhances the bonding force with the micro-arc oxidation layer, and thus improves strength and wear resistance.

[0025] However, polypyrrole has poor dispersibility in water. Therefore, in this scheme, pyrrole and pyrrole-2-sulfonic acid are copolymerized in an acidic dispersion of nano-zirconia to obtain modified polypyrrole, which improves the dispersibility of polypyrrole in water and alleviates the agglomeration of nano-zirconia. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of a wear-resistant aluminum alloy wall panel.

[0027] Figure 2 This is a front view of the wear-resistant aluminum alloy wall panel 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 Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The preparation method of modified gluconic acid is as follows: (1) 1.2 parts of nano-graphene are added to deionized water and ultrasonically dispersed. 0.8 parts of gluconic acid and 10 parts of sodium hydroxide aqueous solution (0.05 g / mL) are added dropwise. The mixture is stirred at room temperature for 4 hours, washed and dried to obtain graphene-gluconic acid; (2) 0.034 parts of EDC and 2.3 parts of imidazole-4,5-dicarboxylic acid are added to 10 parts of phosphate buffer solution (pH = 7.2, containing 0.15 mol / L NaCl) and mixed evenly to obtain mixed solution A and mixed solution B; 1 part of graphene-gluconic acid is added to 15 parts of phosphate buffer solution and ultrasonically dispersed. Mixed solution A is added dropwise and ultrasonically dispersed for 10 minutes. Mixed solution B is added and ultrasonically dispersed for 35 minutes. The mixture is shaken at 25°C for 20 hours, filtered, washed with phosphate buffer solution, and freeze-dried to obtain modified gluconic acid.

[0031] The modified polypyrrole was prepared as follows: 3.2 parts of ammonium persulfate were added to 10 parts of 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; 1.2 nanometers of zirconium dioxide were added to 20 parts of 1 mol hydrochloric acid solution and ultrasonically dispersed; under ice-water bath conditions, 6.7 parts of pyrrole and 2 parts of pyrrole-2-sulfonic acid were added and mixed evenly; the oxidant hydrochloric acid solution was added dropwise over 2 hours; the reaction was carried out for 12 hours; and the mixture was washed and dried to obtain the modified polypyrrole.

[0032] The following aluminum alloy profiles have the same metallic element composition as 6063 aluminum alloy. Using the resulting wear-resistant aluminum alloy profile as the first wall panel, a second wall panel with a second insertion part is slidably connected to the first wall panel to form a cross-sliding structure; thus, a wear-resistant aluminum alloy wall panel is obtained. Figure 1 As shown.

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

[0034] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0035] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0036] Electrolyte A contains the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 4 g / L modified gluconic acid, and 3 g / L phytic acid; Electrolyte B contains the following components: 12 g / L sulfuric acid, 2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.5 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

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

[0038] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0039] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0040] Electrolyte A contains the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid; Electrolyte B contains the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

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

[0042] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0043] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0044] Electrolyte A contains the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 5 g / L modified gluconic acid, and 10 g / L phytic acid; Electrolyte B contains the following components: 15 g / L sulfuric acid, 5 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

[0045] Comparative Example 1 is based on Example 2, except that it undergoes time-related processing;

[0046] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, and dry to obtain aluminum alloy profile A;

[0047] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0048] Electrolyte A contains the following components: 20 g / L sodium hydroxide, 10 g / L Na2SiO3, 7 g / L modified gluconic acid, and 6 g / L phytic acid; Electrolyte B contains the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

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

[0050] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0051] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0052] Electrolyte A comprises the following components: 20 g / L sodium hydroxide, 10 g / L Na₂SiO₃, 7 g / L modified gluconic acid, and 6 g / L phytic acid; Electrolyte B comprises the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

[0053] The preparation method of modified gluconic acid is as follows: (1) 1.2 parts of nano-graphene are added to deionized water and ultrasonically dispersed. 0.8 parts of gluconic acid and 10 parts of sodium hydroxide aqueous solution (0.05 g / mL) are added dropwise. The mixture is stirred at room temperature for 4 hours, washed and dried to obtain graphene-gluconic acid; (2) 0.034 parts of EDC are added to 10 parts of phosphate buffer solution (pH = 7.2, containing 0.15 mol / L NaCl) and mixed evenly to obtain mixed solution A; 1 part of graphene-gluconic acid is added to 15 parts of phosphate buffer solution, ultrasonically dispersed, mixed solution A is added dropwise and ultrasonically dispersed for 35 minutes. The mixture is shaken at 25°C for 20 hours, filtered, washed with phosphate buffer solution, and freeze-dried to obtain modified gluconic acid.

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

[0055] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0056] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0057] Electrolyte A comprises the following components: 20 g / L sodium hydroxide, 10 g / L Na₂SiO₃, 7 g / L modified gluconic acid, and 6 g / L phytic acid; Electrolyte B comprises the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

[0058] The modified polypyrrole was prepared as follows: 3.2 parts of ammonium persulfate were added to 10 parts of 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; 1.2 nanometers of zirconium dioxide were added to 20 parts of 1 mol hydrochloric acid solution and ultrasonically dispersed; under ice-water bath conditions, 6.7 parts of pyrrole were added and mixed evenly; the oxidant hydrochloric acid solution was added dropwise over 2 hours; the reaction was carried out for 12 hours; and the mixture was washed and dried to obtain the modified polypyrrole.

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

[0060] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0061] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and the micro-arc oxidation was carried out for 20 minutes. After washing and drying, the material was placed in 100℃ deionized water for hot water sealing treatment for 30 minutes to obtain wear-resistant aluminum alloy profiles, which were used as the first wall panel.

[0062] The raw materials for 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 was not introduced into the modified polypyrrole;

[0064] Step 1: Place the aluminum alloy profile with the first insertion part in an aqueous solution containing 5wt% NaOH and 3wt% Na2CO3 at a temperature of 50℃, ultrasonically degrease for 10 minutes, wash with water, dry, and age at 170℃ for 6 hours to obtain aluminum alloy profile A.

[0065] Step 2: Place the aluminum alloy profile A in electrolyte A, using aluminum alloy profile A as the anode and the stainless steel electrolytic cell as the cathode. Use constant current mode and set the current density to 12A / dm³. 2 The frequency was set to 500Hz, the duty cycle was set to 20%, and micro-arc oxidation was performed for 20 minutes. After washing and drying, the material was placed in electrolyte B at 35℃, with the platinum sheet electrode as the cathode. The voltage was set to 80V, and anodizing was performed for 40 minutes. The material was then removed, washed, and used as the first wall panel.

[0066] Electrolyte A comprises the following components: 20 g / L sodium hydroxide, 10 g / L Na₂SiO₃, 7 g / L modified gluconic acid, and 6 g / L phytic acid; Electrolyte B comprises the following components: 15 g / L sulfuric acid, 3.2 g / L modified polypyrrole, 0.5 g / L sodium dodecyl sulfate, 0.7 g / L ethylenediaminetetraacetic acid, and 1.5 g / L sodium citrate; Electrolyte B has a pH of 1.8.

[0067] The modified polypyrrole was prepared as follows: 3.2 parts of ammonium persulfate were added to 10 parts of 1 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; 20 parts of 1 mol / L hydrochloric acid solution were mixed with 6.7 parts of pyrrole and 2 parts of pyrrole-2-sulfonic acid under ice-water bath conditions, and the oxidant hydrochloric acid solution was added dropwise over 2 hours. The reaction was carried out for 12 hours, and the mixture was washed and dried to obtain the modified polypyrrole.

[0068] Testing: The wear-resistant aluminum alloy profiles prepared in Examples 1-3 and Comparative Examples 1-5 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 1-3 and Comparative Examples 1-5 was tested using potentiodynamic polarization curves.

[0069]

[0070]

[0071] Table 1

[0072] Conclusions: Comparative Example 1 is based on Example 2, except that aging treatment was performed; this reduced the bonding performance between the aluminum alloy profile and the micro-arc oxidation layer, thus leading to a decrease in the performance of the wear-resistant aluminum alloy profile. Comparative Example 2 is based on Example 2, except that imidazole-4,5-dicarboxylic acid was not introduced into the modified gluconic acid, which reduced the coordination performance of the modified gluconic acid, resulting in a decrease in the interfacial bonding force between the micro-arc oxidation layer and the aluminum alloy profile and the anodic oxide layer, thus affecting the performance of the wear-resistant aluminum alloy profile. Comparative Example 3 is based on Example 2, except that pyrrole-2-sulfonic acid was not introduced into the modified polypyrrole; this reduced the dispersibility of polypyrrole, thus leading to a decrease in the performance of the wear-resistant aluminum alloy profile. Comparative Example 4 is based on Example 2, except that hot water sealing treatment was performed directly after micro-arc oxidation; this led to a decrease in the performance of the wear-resistant aluminum alloy profile. Comparative Example 5 is based on Example 2, except that nano-zirconia was not introduced into the modified polypyrrole, thus leading to a decrease in 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method of making a wear resistant aluminum alloy wallboard, characterized by: The method comprises the following steps: Step 1: the aluminum alloy profile with the first plug-in part is subjected to ultrasonic degreasing and oil removal, washing, drying and aging treatment in sequence to obtain an aluminum alloy profile A; Step 2: the aluminum alloy profile A is subjected to micro-arc oxidation treatment in electrolyte A for 20-25 minutes, washed, dried, and then subjected to anodic oxidation treatment in electrolyte B for 40-50 minutes to obtain a wear-resistant aluminum alloy profile, which is used as the first wallboard; Step 3: the second wallboard with the second plug-in part is slidably connected with the first wallboard to form a cross sliding structure; Thus, the wear-resistant aluminum alloy wallboard is obtained. The raw materials of the electrolyte A comprise the following components: 10-30 g / L of sodium hydroxide, 8-12 g / L of Na2SiO3, 4-8 g / L of modified gluconic acid and 2-10 g / L of phytic acid. The raw materials of the electrolyte B comprise the following components: 12-18 g / L of sulfuric acid, 2-5 g / L of modified polypyrrole, 0.2-0.8 g / L of sodium dodecyl sulfate, 0.5-0.8 g / L of ethylenediaminetetraacetic acid and 1.5-2 g / L of sodium citrate; the pH of the electrolyte B is 1.8-2.

0. The preparation method of the modified gluconic acid is as follows: (1) nano-graphene is added into deionized water and ultrasonically dispersed, and then a gluconic acid and sodium hydroxide aqueous solution are added dropwise, stirred at room temperature for 4-5 hours, washed, and dried to obtain graphene-gluconic acid; (2) EDC and imidazole-4,5-dicarboxylic acid are respectively added into a phosphate buffer solution and uniformly mixed to obtain mixed solution A and mixed solution B; the graphene-gluconic acid is added into the phosphate buffer solution and ultrasonically dispersed, mixed solution A is added dropwise and ultrasonically dispersed for 10-15 minutes, mixed solution B is added and ultrasonically dispersed for 30-40 minutes, and then the mixture is oscillated at 22-25℃ for 18-22 hours, filtered, washed with the phosphate buffer solution, and freeze-dried to obtain the modified gluconic acid; The preparation method of the modified polypyrrole is as follows: ammonium persulfate is added into a 1-2 mol / L hydrochloric acid solution to obtain an oxidant hydrochloric acid solution; Nano-zirconium dioxide is added into a 1-2 mol / L hydrochloric acid solution and ultrasonically dispersed, and then pyrrole and pyrrole-2-sulfonic acid are added and uniformly mixed under ice water bath conditions, the oxidant hydrochloric acid solution is added dropwise, and the reaction is carried out for 10-14 hours, and then the mixture is washed and dried to obtain the modified polypyrrole.

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

3. The method of claim 1, wherein: The raw materials of the graphene-gluconic acid comprise the following components: 1-2 parts of nano-graphene, 0.6-1.2 parts of gluconic acid and 10-12 parts of a sodium hydroxide aqueous solution according to mass fraction; the concentration of the sodium hydroxide aqueous solution is 0.05 g / mL; the raw materials of the modified gluconic acid comprise the following components: 0.02-0.04 parts of EDC, 2-3 parts of imidazole-4,5-dicarboxylic acid, 1-1.2 parts of graphene-gluconic acid and 15-20 parts of a phosphate buffer solution according to mass fraction; the phosphate buffer solution contains 0.1-0.2 mol / L NaCl and has a pH of 7.0-7.

5.

4. The method of claim 1, wherein: The raw material of the modified polypyrole comprises 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.

5. The wear-resistant aluminum alloy wallboard is prepared by the method according to any one of claims 1-4.

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