Antibacterial corrosion-resistant aluminum material and preparation process thereof

Abstract

The application discloses an antibacterial and corrosion-resistant aluminum material, which comprises an aluminum base and an oxide layer covering the surface of the aluminum base, wherein the aluminum base comprises the following components in percentage by mass: Ce 0.7-1.1%, La 0.8-1.2%, Cu 0.2-0.25%, Mg 0.018-0.036%, Ag 0.012-0.018%, Si 0.12-0.16%, Cr 0.08-0.12%, Ti 0.05-0.08%, Zr 0.02-0.06%, Sc 0.002-0.004%, and the balance of Al and inevitable impurities. The application discloses an antibacterial and corrosion-resistant aluminum material and a manufacturing method thereof, and the obtained aluminum alloy has high strength, good fracture toughness, and long-lasting antibacterial effect and corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum alloy, in particular to an antibacterial and corrosion-resistant aluminum material and a preparation process thereof. BACKGROUND

[0002] Although aluminum alloy has excellent properties such as high strength, high elastic modulus, high toughness, high hardenability and high corrosion resistance, it has been widely used in automobiles, ships, aerospace, etc. However, with the continuous development of science and technology, the performance of single traditional metal alloy cannot meet the needs of today's high-tech products. Micro-alloying can endow the alloy system with new potential and fundamentally eliminate some performance defects. At the same time, people pay more and more attention to resisting bacteria, especially in recent years, various antibacterial materials have been gradually applied in textiles, medicine, ceramics, plastics and aquaculture related fields. At present, antibacterial metal materials are mainly steel, and the application of antibacterial aluminum or aluminum alloy materials is relatively small, mostly still in the research stage. SUMMARY

[0003] Therefore, the purpose of the present application is to provide an antibacterial and corrosion-resistant aluminum material and a preparation method thereof, which has high strength, good fracture toughness, and long-lasting antibacterial effect and corrosion resistance.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] An antibacterial and corrosion-resistant aluminum material comprises an aluminum base and an oxide layer covering the surface of the aluminum base, wherein the aluminum base comprises the following components with the mass percentage: Ce 0.7-1.1%, La 0.8-1.2%, Cu 0.2-0.25%, Mg 0.018-0.036%, Ag 0.012-0.018%, Si 0.12-0.16%, Cr 0.08-0.12%, Ti 0.05-0.08%, Zr 0.02-0.06%, Sc 0.002-0.004%, and the balance of Al and inevitable impurities.

[0006] A preparation process of an antibacterial and corrosion-resistant aluminum material comprises the following steps:

[0007] S1: sequentially melt and cast the raw materials of pure aluminum and aluminum intermediate alloy with corresponding mass percentage, homogenize, solid solution and aging treatment, to obtain the aluminum base;

[0008] S2: anodizing treatment is performed on the aluminum base, to obtain the antibacterial and corrosion-resistant aluminum material.

[0009] Preferably, in the step S1, the specific method of the melting and casting is as follows: pure aluminum and Al-TiC, Al-Sc-Zr intermediate alloy are first added to a preheated crucible, heated to 800-850℃ for melting, after complete melting into a metal liquid, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, Al-Cr intermediate alloy is added, stirred, after complete melting, standing for 20-30min, deslagging and pouring to obtain an aluminum alloy blank.

[0010] Preferably, in the step S1, the homogenization treatment is a temperature rising-temperature dropping homogenization treatment process, specifically:

[0011] The temperature rising homogenization treatment is heated to 470-500℃, and the holding time is 12h;

[0012] The temperature dropping homogenization treatment is at 450-460℃, and the holding time is 12h.

[0013] Preferably, in the step S1, the solid solution treatment process is specifically that the ion molten salt is heated to 460-480℃, and the holding time is 1h, and the ion molten salt includes silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid.

[0014] Preferably, the weight ratio of the silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid is 5:5:5:2:1.

[0015] Preferably, in the step S1, the aging treatment is a three-stage aging treatment: 120℃ / 6h+140℃ / 6h+120℃ / 3h, that is, the temperature of the first-stage aging treatment is 120℃, the holding time is 6h; the temperature of the second-stage aging treatment is 140℃, the holding time is 6h; the temperature of the third-stage aging treatment is 120℃, the holding time is 3h.

[0016] Preferably, in the step S2, the anodic oxidation treatment is:

[0017] S21: the aluminum matrix is placed in a sulfuric acid solution with a volume fraction of 50% for oxidation;

[0018] S22: the aluminum matrix oxidized by the step S21 is used as a cathode, a graphite rod electrode is used as an anode, and electrochemical deposition is carried out in an electroplating solution.

[0019] Preferably, the electroplating solution is uniformly stirred and mixed by cesium sulfate, dodecyltrimethoxysilane, aluminum chloride, titanium carbide and deionized water according to a weight ratio of 1:2:1:1:3.

[0020] Preferably, the temperature of the oxidation of the aluminum matrix in the step S21 is 20-25 DEG C, the current density is 1.3-1.4 A / dm2, and the oxidation time is 5-8 min, and in the step S22, the electrochemical deposition is a step-up and step-down deposition, specifically, the temperature is 20-25 DEG C, the voltage of the first-stage deposition is 3-5 V, the deposition time is 10-15 min, the voltage of the second-stage deposition is 1-2 V, and the deposition time is 5-10 min.

[0021] The nanoparticles are uniformly dispersed in the matrix alloy, when the composite material is deformed, the nanoparticles can effectively hinder the movement of dislocations in the matrix, the size of the alpha-Al dendrite is obviously refined, the morphology is continuously transformed into equiaxed crystal, the nanoparticles in the nano-TiC particle matrix alloy play the role of heterogeneous core, and the grain refinement effect is achieved during the solidification of the composite material, so that the crystal grains present equiaxed crystal, the increase of the angle grain boundary is accompanied by the increase of the recrystallized grains, and the mechanical properties of the composite material are improved, the homogenization treatment of heating and cooling and the aging treatment make the Sc and Zr atoms in the alloy be analyzed out, and the precipitated phase formed is coherent with the matrix alloy, so that the hardness of the alloy can be significantly improved.

[0022] In addition, by adding the Al-TiC, Al-Sc-Zr intermediate alloy, the TiC can pin the subgrain during the aging treatment, the Sc and Zr can further prevent the static recrystallization of the alloy, hinder the dynamic recovery, stabilize the substructure, reduce the fraction of the high-angle grain boundary in the composite material, form the dislocation wall, and thus the tensile strength and elongation of the composite material are improved.

[0023] In addition, by depositing cesium and aluminum into the micropores and the surface of the anodic oxidation film, the aluminum anodic oxidation film can exhibit excellent antibacterial performance and corrosion resistance; after the cesium and aluminum are deposited in the micropores and on the surface of the anodic oxidation film, the cesium and aluminum have strong binding capacity with the anodic oxidation film and can be compounded with TiC, so that the Ce-Al-TiC composite coating with strong adhesion to the aluminum matrix and corrosion resistance is obtained on the surface of the aluminum alloy, and the antibacterial property and corrosion resistance are further improved. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application. In addition, it is particularly stated that the raw materials and equipment of the present application can be obtained from the market, and will not be listed one by one.

[0025] Embodiment one

[0026] The application discloses an antibacterial and corrosion-resistant aluminum material, which comprises an aluminum base and an oxide layer covering the surface of the aluminum base, wherein the aluminum base comprises the following components in percentage by mass: Ce 1.1%, La 1.2%, Cu 0.25%, Mg 0.036%, Ag 0.018%, Si 0.16%, Cr 0.12%, Ti 0.08%, Zr 0.06%, Sc 0.004%, and the balance of Al and inevitable impurities.

[0027] The application further discloses a preparation process of the antibacterial and corrosion-resistant aluminum material.

[0028] S1: raw materials corresponding to percentage by mass of pure aluminum and aluminum intermediate alloy components are sequentially subjected to melting and casting, homogenization treatment, solid solution treatment and aging treatment to obtain an aluminum base;

[0029] S2: the aluminum base is subjected to anodic oxidation treatment to obtain the antibacterial and corrosion-resistant aluminum material.

[0030] In step S1, the specific method of melting and casting is as follows: pure aluminum and Al-TiC, Al-Sc-Zr intermediate alloy are added into a preheated crucible, heated to 850 DEG C for melting, after complete melting into a metal liquid, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, Al-Cr intermediate alloy is added, stirred, after complete melting, standing for 30 min, deslagging and pouring to obtain an aluminum alloy blank.

[0031] In step S1, the homogenization treatment is an up-down temperature homogenization treatment process, and the specific process is as follows:

[0032] The temperature of the up temperature homogenization treatment is up to 500 DEG C, and the holding time is 12 h;

[0033] The temperature of the down temperature homogenization treatment is 460 DEG C, and the holding time is 12 h.

[0034] In step S1, the solid solution treatment process is as follows: ion molten salt is heated to 480 DEG C, and the holding time is 1 h, the ion molten salt comprises silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid, and the weight ratio of the silver nitrate, the copper nitrate, the magnesium nitrate, the magnesium pyrophosphate and the silicic acid is 5:5:5:2:1.

[0035] In step S1, the aging treatment is three-stage aging treatment: 120 DEG C / 6h+140 DEG C / 6h+120 DEG C / 3h, that is, the temperature of the first-stage aging treatment is 120 DEG C, the holding time is 6 h, the temperature of the second-stage aging treatment is 140 DEG C, the holding time is 6 h, and the temperature of the third-stage aging treatment is 120 DEG C, the holding time is 3 h.

[0036] In step S2, the anodic oxidation treatment is as follows:

[0037] S21: The aluminum matrix is placed in a sulfuric acid solution with a volume fraction of 50%, and is oxidized at a temperature of 25℃, a current density of 1.4A / dm2, and an oxidation time of 8min;

[0038] S22: The aluminum matrix oxidized by the step S21 is used as a cathode, and a graphite rod electrode is used as an anode, and electrochemical deposition is carried out in an electroplating solution, wherein the temperature is 25℃, the first voltage deposition is 5V, the deposition time is 15min, the second voltage deposition is 2V, and the deposition time is 10min.

[0039] The electroplating solution is prepared by ultrasonic stirring and uniform mixing of cesium sulfate, dodecyltrimethoxysilane, aluminum chloride, titanium carbide, and deionized water in a weight ratio of 1:2:1:1:3.

[0040] Example Two

[0041] An antibacterial and corrosion-resistant aluminum material, comprising an aluminum matrix and an oxide layer covering the surface of the aluminum matrix, wherein the aluminum matrix comprises the following components in mass percentage: Ce 0.7%, La 0.8%, Cu 0.2%, Mg 0.018%, Ag 0.012%, Si 0.12%, Cr 0.08%, Ti 0.05%, Zr 0.02%, Sc 0.002%, and the balance being Al and unavoidable impurities.

[0042] A preparation process of an antibacterial and corrosion-resistant aluminum material, comprising the following steps:

[0043] S1: Pure aluminum and raw materials corresponding to the mass percentage of aluminum intermediate alloy components are sequentially subjected to melting and casting, homogenization treatment, solid solution treatment, and aging treatment to obtain an aluminum matrix.

[0044] S2: The aluminum matrix is subjected to anodic oxidation treatment to obtain the antibacterial and corrosion-resistant aluminum material.

[0045] In step S1, the specific method of melting and casting is as follows: first, pure aluminum and Al-TiC, Al-Sc-Zr intermediate alloy are added to a preheated crucible, heated to 800℃ for melting, after completely melted into a metal liquid, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, Al-Cr intermediate alloy is added and stirred, after completely melted, it is placed for 20min, deslagging and pouring to obtain aluminum alloy blank.

[0046] In step S1, the homogenization treatment is an up-down temperature homogenization treatment process, which is specifically as follows:

[0047] The temperature of the up temperature homogenization treatment is up to 470℃, and the holding time is 12h.

[0048] The temperature of the temperature reduction homogenization treatment is 450℃, and the holding time is 12h.

[0049] In step S1, the solid solution treatment process is as follows: the ion molten salt is heated to 460℃, and the holding time is 1h. The ion molten salt includes silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid, and the weight ratio of silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid is 5:5:5:2:1.

[0050] In step S1, the aging treatment is three-stage aging treatment: 120℃ / 6h+140℃ / 6h+120℃ / 3h, that is, the temperature of the first-stage aging treatment is 120℃, the holding time is 6h; the temperature of the second-stage aging treatment is 140℃, the holding time is 6h; and the temperature of the third-stage aging treatment is 120℃, the holding time is 3h.

[0051] In step S2, the anodic oxidation treatment is as follows:

[0052] S21: the aluminum base is placed in a sulfuric acid solution with a volume fraction of 50%, and is oxidized at a temperature of 20℃, a current density of 1.3A / dm2, and an oxidation time of 5min;

[0053] S22: the aluminum base oxidized by the step S21 is used as a cathode, and a graphite rod electrode is used as an anode, and electrochemical deposition is carried out in an electroplating solution, wherein the temperature is 20℃, the first-stage voltage deposition is 3V, the deposition time is 10min, the second-stage voltage deposition is 1V, and the deposition time is 5min.

[0054] In step S2, the anodic oxidation treatment is as follows:

[0055] Example Three

[0056] An antibacterial and corrosion-resistant aluminum material includes an aluminum base and an oxide layer covering the surface of the aluminum base. The aluminum base includes the following components with mass percentages: Ce 0.9%, La 1.0%, Cu 0.22%, Mg 0.026%, Ag 0.016%, Si 0.14%, Cr 0.09%, Ti 0.07%, Zr 0.05%, Sc 0.003%, and the balance is Al and unavoidable impurities.

[0057] A preparation process of an antibacterial and corrosion-resistant aluminum material includes the following steps:

[0058] S1: pure aluminum and aluminum intermediate alloy composition corresponding mass percentage of raw materials in turn for smelting casting, homogenization treatment, solid solution treatment and aging treatment, get aluminum matrix;

[0059] S2: the aluminum matrix is subjected to anodic oxidation treatment, and the antibacterial corrosion-resistant aluminum material is obtained.

[0060] In step S1, the specific method of smelting casting is: first, pure aluminum and Al-TiC, Al-Sc-Zr intermediate alloy are added to the preheated crucible, heated to 830℃ for smelting, after completely melted into metal liquid, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, Al-Cr intermediate alloy is added, stirring, after completely melting, standing for 25min, deslagging and pouring, getting aluminum alloy billet.

[0061] In step S1, the homogenization treatment is an up-down temperature homogenization treatment process, specifically:

[0062] The temperature of the up temperature homogenization treatment is up to 480℃, and the holding time is 12h;

[0063] The temperature of the down temperature homogenization treatment is 455℃, and the holding time is 12h.

[0064] In step S1, the solid solution treatment process is specifically: the ionic molten salt is heated to 470℃, and the holding time is 1h, the ionic molten salt includes silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid, and the weight ratio of silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid is 5:5:5:2:1.

[0065] In step S1, the aging treatment is three-stage aging treatment: 120℃ / 6h+140℃ / 6h+120℃ / 3h, that is, the temperature of the first-stage aging treatment is 120℃, the holding time is 6h; the temperature of the second-stage aging treatment is 140℃, the holding time is 6h; the temperature of the third-stage aging treatment is 120℃, the holding time is 3h.

[0066] In step S2, the anodic oxidation treatment is:

[0067] S21: the aluminum matrix is placed in a sulfuric acid solution with a volume fraction of 50%, and is oxidized at a temperature of 22℃, a current density of 1.35A / dm2 and an oxidation time of 6min;

[0068] S22: the aluminum matrix oxidized by the step S21 is used as a cathode, and a graphite rod electrode is used as an anode, and is subjected to electrochemical deposition in an electroplating solution, wherein the temperature is 22℃, the first stage voltage deposition is 4V, the deposition time is 12min, and the second stage voltage deposition is 1.5V, the deposition time is 8min.

[0069] The electroplating solution is prepared by ultrasonic stirring and mixing cesium sulfate, dodecyltrimethoxysilane, aluminum chloride, titanium carbide and deionized water in a weight ratio of 1:2:1:1:3.

[0070] Comparative Example 1

[0071] Comparative Example 1 and Example 1 have basically the same component mass and preparation process, except that Al-TiC and Al-Sc-Zr intermediate alloys are not used, specifically:

[0072] An antibacterial corrosion-resistant aluminum material includes an aluminum base and an oxide layer covering the surface of the aluminum base. The aluminum base includes the following mass percentage components: Ce 1.1%, La 1.2%, Cu 0.25%, Mg 0.036%, Ag 0.018%, Si 0.16%, Cr 0.12%, and the balance of Al and unavoidable impurities.

[0073] A preparation process of an antibacterial corrosion-resistant aluminum material includes the following steps:

[0074] S1: sequentially melt-cast, homogenize, solid-solution treat and age-treat raw materials corresponding to the mass percentage of pure aluminum and aluminum intermediate alloy components to obtain an aluminum base;

[0075] S2: anodize the aluminum base to obtain the antibacterial corrosion-resistant aluminum material.

[0076] In step S1, the specific method of melt-casting is to first add pure aluminum, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, and Al-Cr intermediate alloys, stir, and after complete melting, stand for 30 min, remove slag and pour to obtain aluminum alloy blanks.

[0077] In step S1, the homogenization treatment is an up-down temperature homogenization treatment process, specifically:

[0078] The temperature of the up-temperature homogenization treatment is up to 500℃, and the holding time is 12h;

[0079] The temperature of the down-temperature homogenization treatment is 460℃, and the holding time is 12h.

[0080] In step S1, the solid-solution treatment process is specifically: heat the ionic molten salt to 480℃, and the holding time is 1h, the ionic molten salt includes silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid, and the weight ratio of silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid is 5:5:5:2:1.

[0081] In step S1, the aging treatment is a three-stage aging treatment: 120℃ / 6h+140℃ / 6h+120℃ / 3h, i.e., the temperature of the first-stage aging treatment is 120℃, the holding time is 6h; the temperature of the second-stage aging treatment is 140℃, the holding time is 6h; the temperature of the third-stage aging treatment is 120℃, the holding time is 3h.

[0082] In step S2, the anodic oxidation treatment is as follows:

[0083] S21: The aluminum base is placed in a sulfuric acid solution with a volume fraction of 50%, and is oxidized at a temperature of 25℃, a current density of 1.4A / dm2, and an oxidation time of 8min.

[0084] S22: The aluminum base oxidized in step S21 is used as a cathode, and a graphite rod electrode is used as an anode, and electrochemical deposition is carried out in an electroplating solution, wherein the temperature is 25℃, the first-stage voltage deposition is 5V, the deposition time is 15min, the second-stage voltage deposition is 2V, and the deposition time is 10min.

[0085] The electroplating solution is prepared by ultrasonic stirring and uniform mixing of cesium sulfate, dodecyltrimethoxysilane, aluminum chloride, titanium carbide, and deionized water in a weight ratio of 1:2:1:1:3.

[0086] Comparative Example 2

[0087] Comparative Example 1 and Example 1 have basically the same component mass and preparation process, except that Al-TiC and Al-Sc-Zr intermediate alloys are not used, and cesium sulfate and titanium carbide are not used as electrolyte components, specifically:

[0088] An antibacterial and corrosion-resistant aluminum material includes an aluminum base and an oxide layer covering the surface of the aluminum base. The aluminum base includes the following mass percentage components: Ce 1.1%, La 1.2%, Cu 0.25%, Mg 0.036%, Ag 0.018%, Si 0.16%, Cr 0.12%, and the balance of Al and unavoidable impurities.

[0089] A preparation process of an antibacterial and corrosion-resistant aluminum material includes the following steps:

[0090] S1: Pure aluminum and aluminum intermediate alloy components with corresponding mass percentage of raw materials are sequentially subjected to melting and casting, homogenization treatment, solid solution treatment, and aging treatment to obtain an aluminum base.

[0091] S2: The aluminum base is subjected to anodic oxidation treatment to obtain an antibacterial and corrosion-resistant aluminum material.

[0092] In step S1, the specific method of smelting and casting is: first, add pure aluminum, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, and Al-Cr intermediate alloy, stir, and after all are melted, stand for 30 min, remove slag and pour to obtain aluminum alloy blank.

[0093] In step S1, the homogenization treatment is an ascending temperature-descending temperature homogenization treatment process, specifically:

[0094] The temperature of the ascending temperature homogenization treatment is ascending to 500℃, and the holding time is 12h;

[0095] The temperature of the descending temperature homogenization treatment is 460℃, and the holding time is 12h.

[0096] In step S1, the solid solution treatment process is specifically: heat the ionic molten salt to 480℃, and the holding time is 1h, the ionic molten salt includes silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid, and the weight ratio of silver nitrate, copper nitrate, magnesium nitrate, magnesium pyrophosphate and silicic acid is 5:5:5:2:1.

[0097] In step S1, the aging treatment is three-stage aging treatment: 120℃ / 6h+140℃ / 6h+120℃ / 3h, that is, the temperature of the first-stage aging treatment is 120℃, the holding time is 6h; the temperature of the second-stage aging treatment is 140℃, the holding time is 6h; the temperature of the third-stage aging treatment is 120℃, the holding time is 3h.

[0098] In step S2, the anodic oxidation treatment is:

[0099] S21: place the aluminum matrix in a sulfuric acid solution with a volume fraction of 50%, at a temperature of 25℃, a current density of 1.4A / dm2, and an oxidation time of 8min;

[0100] S22: take the aluminum matrix oxidized by the step S21 as the cathode, and the graphite rod electrode as the anode, and perform electrochemical deposition in the electroplating solution, wherein the temperature is 25℃, the first-stage voltage deposition is 5V, the deposition time is 15min, and the second-stage voltage deposition is 2V, the deposition time is 10min.

[0101] The electroplating solution is prepared by ultrasonic stirring and mixing aluminum chloride and deionized water in a weight ratio of 1:3.

[0102] The samples of the aluminum alloy obtained in Examples 1-3 and Comparative Examples 1-2 are tested for hardness, yield strength, tensile strength and elongation.

[0103] Hardness test: The samples of the aluminum alloy obtained from Example 1-3 and Comparative Example 1 were cut into 10mm x 10mm x 5mm cubic samples, and then polished with coarse and fine sandpaper until 1500# metallographic sandpaper, and then polished with diamond polishing agent, washed and dried for standby. The hardness testing equipment was HV-1000 type microhardness tester.

[0104] Yield strength, tensile strength and elongation test:

[0105] The size of the room temperature tensile sample was designed according to the national standard GB / T228.1-2010, and the tensile property test was carried out on the INSPEK-Table100 type electronic universal tensile testing machine. The actual size data of each sample was accurately measured before the tensile test, the tensile rate of the aluminum alloy was 3mm / min, and the tensile test data was automatically collected to determine the yield strength, tensile strength and elongation of the alloy.

[0106] Antibacterial property test: According to the national standard GB / T12967.1-2008 "Aluminum and aluminum alloy anodic oxidation film detection method", the antibacterial property of the aluminum alloy samples prepared in Example 1-3 and Comparative Example 1-2 was detected, and the detection bacteria were Escherichia coli and Staphylococcus aureus.

[0107] Salt spray resistance test: According to GB / T1771-2007 test, the temperature in the salt spray chamber was 35℃, the collected sodium chloride concentration was 60g / L, and the pH was 6.8;

[0108] The results are shown in Table 1.

[0109] Table 1

[0110]

[0111] As can be seen from the above table, the hardness, yield strength, tensile strength and elongation of Example 1-3 are improved compared with Comparative Example 1 and Comparative Example 2, and have good antibacterial property and corrosion resistance.

[0112] The above description of the disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A preparation process for antibacterial and corrosion-resistant aluminum material, characterized in that: The method comprises the following steps: S1: pure aluminum and aluminum intermediate alloy components corresponding mass percentage of raw materials are sequentially subjected to melting casting, homogenization treatment, solid solution treatment and aging treatment to obtain an aluminum matrix; S2: the aluminum matrix is subjected to anodic oxidation treatment, and the antibacterial and corrosion-resistant aluminum material is obtained; In the step S1, the specific method of melting casting is as follows: pure aluminum and Al-TiC, Al-Sc-Zr intermediate alloy are added to a preheated crucible, heated to 800-850℃ for melting, after completely melted into a metal liquid, Al-Si, Al-Ce, Al-La, Al-Cu, Al-Mg, Al-Ag, Al-Cr intermediate alloy is added, stirred, after completely melted, standing for 20-30min, deslagging and pouring to obtain an aluminum alloy blank; In the step S2, the anodic oxidation treatment is as follows: S21: the aluminum matrix is placed in a sulfuric acid solution with a volume fraction of 50% for oxidation; S22: the aluminum matrix after the step S21 oxidation is used as a cathode, and a graphite rod electrode is used as an anode for electrochemical deposition in an electroplating solution; The electroplating solution is prepared by ultrasonic stirring and mixing cesium sulfate, dodecyltrimethoxysilane, aluminum chloride, titanium carbide and deionized water in a weight ratio of 1:2:1:1:3; The antibacterial and corrosion-resistant aluminum material comprises an aluminum matrix and an oxide layer covering the surface of the aluminum matrix, and the aluminum matrix comprises the following mass percentage of components: Ce 0.7-1.1%, La 0.8-1.2%, Cu 0.2-0.25%, Mg 0.018-0.036%, Ag 0.012-0.018%, Si 0.12-0.16%, Cr 0.08-0.12%, Ti 0.05-0.08%, Zr 0.02-0.06%, Sc 0.002-0.004%, and the balance is Al and inevitable impurities.

2. The process for preparing an antibacterial corrosion resistant aluminum material according to claim 1, wherein In the step S1, the homogenization treatment is an ascending temperature and descending temperature homogenization treatment process, specifically as follows: The temperature of the ascending temperature homogenization treatment is 470-500℃, and the holding time is 12h; The temperature of the descending temperature homogenization treatment is 450-460℃, and the holding time is 12h.

3. The process for preparing an antibacterial corrosion resistant aluminum material according to claim 1, wherein The temperature of the oxidation of the aluminum matrix in the step S21 is 20-25℃, the current density is 1.3-1.4A / dm 2 , the oxidation time is 5-8min, the electrochemical deposition in the step S22 is step-up and step-down deposition, specifically: the temperature is 20-25℃, the voltage deposition in the first section is 3-5V, the deposition time is 10-15min, the voltage deposition in the second section is 1-2V, and the deposition time is 5-10min.

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